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1. Curriculum agility as optional CDIO standard

Author

Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Edström, Kristina, Keller, Elizabeth, Lyng, Reidar, McCartan, Charles, Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Edström, Kristina, Keller, Elizabeth, Lyng, Reidar, and McCartan, Charles

Abstract

The concept of Curriculum Agility has been co-created in a series of sessions at CDIO meetings and conferences since 2018. Deliverables were a jointly generated definition, characteristics, a set of principles, and a self-mapping process on these principles. Using the Curriculum Agility concept offers guidance for CDIO programs and institutions in increasing the adaptability of their curricula based on the latest insights and developments in their discipline, continuously fulfilling the need of an ever more diverse student population and anticipating sudden societal changes. Curriculum Agility takes a holistic approach to considering conditions for proactive and timely curriculum development, including but not limited to enhancement of faculty competence. Although the success of CDIO implementation depends on this wider set of conditions that can drive, enable, or hinder change, this is currently not addressed in the CDIO standards. This paper proposes Curriculum Agility as an optional standard in the CDIO framework. It is a widely applicable, program-level concept including both educational and organisational aspects that addresses an important need in engineering education, and it is co-created within the CDIO community. Curriculum Agility is currently not sufficiently present or addressed in the existing standards. Therefore, this paper argues that Curriculum Agility as an optional standard and rubric will be a new useful tool in the CDIO toolbox., QC 20231204

Published
2023

2. A comprehensive assessment of anthropogenic and natural sources and sinks of Australasia's carbon budget

Author

Villalobos, Yohanna, Canadell, Josep G., Keller, Elizabeth D., Briggs, Peter R., Bukosa, Beata, Giltrap, Donna L., Harman, Ian, Hilton, Timothy W., Kirschbaum, Miko U. F., Lauerwald, Ronny, Liang, Liyin L., Maavara, Taylor, Mikaloff-Fletcher, Sara E., Rayner, Peter J., Resplandy, Laure, Rosentreter, Judith, Metz, Eva M., Serrano, Oscar, Smith, Benjamin, Villalobos, Yohanna, Canadell, Josep G., Keller, Elizabeth D., Briggs, Peter R., Bukosa, Beata, Giltrap, Donna L., Harman, Ian, Hilton, Timothy W., Kirschbaum, Miko U. F., Lauerwald, Ronny, Liang, Liyin L., Maavara, Taylor, Mikaloff-Fletcher, Sara E., Rayner, Peter J., Resplandy, Laure, Rosentreter, Judith, Metz, Eva M., Serrano, Oscar, and Smith, Benjamin

Abstract

Regional carbon budget assessments attribute and track changes in carbon sources and sinks and support the development and monitoring the efficacy of climate policies. We present a comprehensive assessment of the natural and anthropogenic carbon (C-CO2) fluxes for Australasia as a whole, as well as for Australia and New Zealand individually, for the period from 2010 to 2019, using two approaches: bottom-up methods that integrate flux estimates from land-surface models, data-driven models, and inventory estimates; and top-down atmospheric inversions based on satellite and in situ measurements. Our bottom-up decadal assessment suggests that Australasia's net carbon balance was close to carbon neutral (−0.4 ± 77.0 TgC yr−1). However, substantial uncertainties remain in this estimate, primarily driven by the large spread between our regional terrestrial biosphere simulations and predictions from global ecosystem models. Within Australasia, Australia was a net source of 38.2 ± 75.8 TgC yr−1, and New Zealand was a net CO2 sink of −38.6 ± 13.4 TgC yr−1. The top-down approach using atmospheric CO2 inversions indicates that fluxes derived from the latest satellite retrievals are consistent within the range of uncertainties with Australia's bottom-up budget. For New Zealand, the best agreement was found with a national scale flux inversion estimate based on in situ measurements, which provide better constrained of fluxes than satellite flux inversions. This study marks an important step toward a more comprehensive understanding of the net CO2 balance in both countries, facilitating the improvement of carbon accounting approaches and strategies to reduce emissions.

Published
2023

3. RECCAP2 Future Component : Consistency and Potential for Regional Assessment to Constrain Global Projections

Author

Jones, Chris D., Ziehn, Tilo, Anand, Jatin, Bastos, Ana, Burke, Eleanor, Canadell, Josep G., Cardoso, Manoel, Ernst, Yolandi, Jain, Atul K., Jeong, Sujong, Keller, Elizabeth D., Kondo, Masayuki, Lauerwald, Ronny, Lin, Tzu Shun, Murray-Tortarolo, Guillermo, Nabuurs, Gert Jan, O’Sullivan, Mike, Poulter, Ben, Qin, Xiaoyu, von Randow, Celso, Sanches, Marcos, Schepaschenko, Dmitry, Shvidenko, Anatoly, Smallman, Luke, Tian, Hanqin, Villalobos, Yohanna, Wang, Xuhui, Yun, Jeongmin, Jones, Chris D., Ziehn, Tilo, Anand, Jatin, Bastos, Ana, Burke, Eleanor, Canadell, Josep G., Cardoso, Manoel, Ernst, Yolandi, Jain, Atul K., Jeong, Sujong, Keller, Elizabeth D., Kondo, Masayuki, Lauerwald, Ronny, Lin, Tzu Shun, Murray-Tortarolo, Guillermo, Nabuurs, Gert Jan, O’Sullivan, Mike, Poulter, Ben, Qin, Xiaoyu, von Randow, Celso, Sanches, Marcos, Schepaschenko, Dmitry, Shvidenko, Anatoly, Smallman, Luke, Tian, Hanqin, Villalobos, Yohanna, Wang, Xuhui, and Yun, Jeongmin

Abstract

Projections of future carbon sinks and stocks are important because they show how the world's ecosystems will respond to elevated CO2 and changes in climate. Moreover, they are crucial to inform policy decisions around emissions reductions to stay within the global warming levels identified by the Paris Agreement. However, Earth System Models from the 6th Coupled Model Intercomparison Project (CMIP6) show substantial spread in future projections—especially of the terrestrial carbon cycle, leading to a large uncertainty in our knowledge of any remaining carbon budget (RCB). Here we evaluate the global terrestrial carbon cycle projections on a region-by-region basis and compare the global models with regional assessments made by the REgional Carbon Cycle Assessment and Processes, Phase 2 activity. Results show that for each region, the CMIP6 multi-model mean is generally consistent with the regional assessment, but substantial cross-model spread exists. Nonetheless, all models perform well in some regions and no region is without some well performing models. This gives confidence that the CMIP6 models can be used to look at future changes in carbon stocks on a regional basis with appropriate model assessment and benchmarking. We find that most regions of the world remain cumulative net sources of CO2 between now and 2100 when considering the balance of fossil-fuels and natural sinks, even under aggressive mitigation scenarios. This paper identifies strengths and weaknesses for each model in terms of its performance over a particular region including how process representation might impact those results and sets the agenda for applying stricter constraints at regional scales to reduce the uncertainty in global projections.

Published
2023

4. Curriculum Agility : Responsive Organization, Dynamic Content, and Flexible Education

Author

Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Georgsson, Fredrik, Keller, Elizabeth, Lyng, Reidar, McCartan, Charles, Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Georgsson, Fredrik, Keller, Elizabeth, Lyng, Reidar, and McCartan, Charles

Abstract

This special session, within the conference theme of Incorporating Convergence into Programs, Curricula, and Continuing Education, focuses on Curriculum Agility in engineering education. It will introduce the concept of Curriculum Agility and its current trends, as well as further co-develop the concept behind it. This is done following an iterative design thinking approach, by co-creating guiding principles that engineering institutions can use to make their study programs more responsive, dynamic, and flexible. Curriculum Agility is particularly important in engineering education in order to keep pace with the rapid development of new technologies and materials. In addition, the concept aims to meet students' expectations and needs for more individualized study plans, as well as society's need for forward-thinking engineers equipped to contribute to finding solutions to current and future societal challenges. Thus, to anticipate and meet these challenges, institutions for engineering education need to have an organizational and management structure with the capacity to act within a much shorter timeframe than traditionally seen in universities. Curriculum Agility is a framework for introducing necessary changes in operations to be able to act responsibly and rapidly on change and expectations. This work presents seven principles for Curriculum Agility that have emerged from a series of sessions at international conferences and network meetings. The seven principles currently include: Stakeholder Involvement, Organization and Governance, Decision Making, Program and Course Design, Innovation of Education, and Pedagogy and Didactics. This special session brings educators together to discuss the 'what, how and why' with regard to Curriculum Agility. The overall aim is to further develop a shared vision on Curriculum Agility and build upon the intention of assessing it at different levels in the organization of engineering education institutions. The expected outcome

Published
2021
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5. Curriculum Agility : Responsive Organization, Dynamic Content, and Flexible Education

Author

Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Georgsson, Fredrik, Keller, Elizabeth, Lyng, Reidar, McCartan, Charles, Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Georgsson, Fredrik, Keller, Elizabeth, Lyng, Reidar, and McCartan, Charles

Abstract

This special session, within the conference theme of Incorporating Convergence into Programs, Curricula, and Continuing Education, focuses on Curriculum Agility in engineering education. It will introduce the concept of Curriculum Agility and its current trends, as well as further co-develop the concept behind it. This is done following an iterative design thinking approach, by co-creating guiding principles that engineering institutions can use to make their study programs more responsive, dynamic, and flexible. Curriculum Agility is particularly important in engineering education in order to keep pace with the rapid development of new technologies and materials. In addition, the concept aims to meet students' expectations and needs for more individualized study plans, as well as society's need for forward-thinking engineers equipped to contribute to finding solutions to current and future societal challenges. Thus, to anticipate and meet these challenges, institutions for engineering education need to have an organizational and management structure with the capacity to act within a much shorter timeframe than traditionally seen in universities. Curriculum Agility is a framework for introducing necessary changes in operations to be able to act responsibly and rapidly on change and expectations. This work presents seven principles for Curriculum Agility that have emerged from a series of sessions at international conferences and network meetings. The seven principles currently include: Stakeholder Involvement, Organization and Governance, Decision Making, Program and Course Design, Innovation of Education, and Pedagogy and Didactics. This special session brings educators together to discuss the 'what, how and why' with regard to Curriculum Agility. The overall aim is to further develop a shared vision on Curriculum Agility and build upon the intention of assessing it at different levels in the organization of engineering education institutions. The expected outcome, QC 20220728part of proceedings ISBN 978-1-6654-3851-3

Published
2021
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6. An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica

Author

Lee, James E., Brook, Edward J., Bertler, Nancy A. N., Buizert, Christo, Baisden, Troy, Blunier, Thomas, Ciobanu, V. Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Fudge, Tyler J., Hindmarsh, Richard, Keller, Elizabeth D., Parrenin, Frédéric, Severinghaus, Jeffrey P., Vallelonga, Paul, Waddington, Edwin D., Winstrup, Mai, Lee, James E., Brook, Edward J., Bertler, Nancy A. N., Buizert, Christo, Baisden, Troy, Blunier, Thomas, Ciobanu, V. Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Fudge, Tyler J., Hindmarsh, Richard, Keller, Elizabeth D., Parrenin, Frédéric, Severinghaus, Jeffrey P., Vallelonga, Paul, Waddington, Edwin D., and Winstrup, Mai

Abstract

In 2013 an ice core was recovered from Roosevelt Island, an ice dome between two submarine troughs carved by paleo-ice-streams in the Ross Sea, Antarctica. The ice core is part of the Roosevelt Island Climate Evolution (RICE) project and provides new information about the past configuration of the West Antarctic Ice Sheet (WAIS) and its retreat during the last deglaciation. In this work we present the RICE17 chronology, which establishes the depth–age relationship for the top 754 m of the 763 m core. RICE17 is a composite chronology combining annual layer interpretations for 0–343 m (Winstrup et al., 2019) with new estimates for gas and ice ages based on synchronization of CH4 and δ18Oatm records to corresponding records from the WAIS Divide ice core and by modeling of the gas age–ice age difference. Novel aspects of this work include the following: (1) an automated algorithm for multiproxy stratigraphic synchronization of high-resolution gas records; (2) synchronization using centennial-scale variations in methane for pre-anthropogenic time periods (60–720 m, 1971 CE to 30 ka), a strategy applicable for future ice cores; and (3) the observation of a continuous climate record back to ∼65 ka providing evidence that the Roosevelt Island Ice Dome was a constant feature throughout the last glacial period.

Published
2020

7. Assessing Curriculum Agility in a CDIO Engineering Education

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

Change and individualization are two aspects that are important in innovative higher education. In this paper, we argue for how the concept of curriculum agility can be used as a framework for engineering education that is able to meet societal, environmental, and technological challenges. In order to both anticipate and meet the needs of the rapidly changing world, engineering education needs to have an organization that allows for innovation, change and adaptation, with the capacity to respond within a (much) shorter timeframe than traditionally seen in higher education. The structure and processes of such organizations should include the time needed to establish and decommission new educational programmes, and the flexibility within the programmes. The CDIO’s Curriculum Agility Working Group has defined seven principles for curriculum agility and has analysed how these relate to the CDIOStandards. This paper describes how the principles can provide guidance on both a curricular and institutional level. The principles are mapped against the CDIO Standards, relating to what is required for an agile curriculum, in order to indicate how the Standards can be utilized to assess the flexibility and agility of educational programmes., Part of proceedings: ISBN 978-91-88041-27-2QC 20210218

Published
2020

8. Assessing Curriculum Agility in a CDIO Engineering Education

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

Change and individualization are two aspects that are important in innovative higher education. In this paper, we argue for how the concept of curriculum agility can be used as a framework for engineering education that is able to meet societal, environmental, and technological challenges. In order to both anticipate and meet the needs of the rapidly changing world, engineering education needs to have an organization that allows for innovation, change and adaptation, with the capacity to respond within a (much) shorter timeframe than traditionally seen in higher education. The structure and processes of such organizations should include the time needed to establish and decommission new educational programmes, and the flexibility within the programmes. The CDIO’s Curriculum Agility Working Group has defined seven principles for curriculum agility and has analysed how these relate to the CDIOStandards. This paper describes how the principles can provide guidance on both a curricular and institutional level. The principles are mapped against the CDIO Standards, relating to what is required for an agile curriculum, in order to indicate how the Standards can be utilized to assess the flexibility and agility of educational programmes., Part of proceedings: ISBN 978-91-88041-27-2QC 20210218

Published
2020

9. Assessing curriculum agility in a CDIO engineering education

Author

Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Georgsson, Fredrik, Keller, Elizabeth, Lyng, Reidar, McCartan, Charles, Brink, Suzanne, Carlsson, Carl Johan, Enelund, Mikael, Georgsson, Fredrik, Keller, Elizabeth, Lyng, Reidar, and McCartan, Charles

Abstract

Change and individualization are two aspects that are important in innovative higher education. In this paper, we argue for how the concept of curriculum agility can be used as a framework for engineering education that is able to meet societal, environmental, and technological challenges. To both anticipate and meet the needs of the rapidly changing world, engineering education needs to have an organization that allows for innovation, change, and adaptation, with the capacity to respond within a (much) shorter timeframe than traditionally seen in higher education. The structure and processes of such organizations should include the time needed to establish and decommission new educational programmes, and the flexibility within the programmes. The CDIO's Curriculum Agility Working Group has defined seven principles for curriculum agility and has analysed how these relate to the CDIO Standards. This paper describes how the principles can provide guidance on both a curricular and institutional level. The principles are mapped against the CDIO Standards, relating to what is required for an agile curriculum, in order to indicate how the Standards can be utilized to assess the flexibility and agility of educational programmes.

Published
2020

10. An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica

Author

Lee, James E., Brook, Edward J., Bertler, Nancy A. N., Buizert, Christo, Baisden, Troy, Blunier, Thomas, Ciobanu, V. Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Fudge, Tyler J., Hindmarsh, Richard, Keller, Elizabeth D., Parrenin, Frederic, Severinghaus, Jeffrey P., Vallelonga, Paul, Waddington, Edwin D., Winstrup, Mai, Lee, James E., Brook, Edward J., Bertler, Nancy A. N., Buizert, Christo, Baisden, Troy, Blunier, Thomas, Ciobanu, V. Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Fudge, Tyler J., Hindmarsh, Richard, Keller, Elizabeth D., Parrenin, Frederic, Severinghaus, Jeffrey P., Vallelonga, Paul, Waddington, Edwin D., and Winstrup, Mai

Abstract

In 2013 an ice core was recovered from Roosevelt Island, an ice dome between two submarine troughs carved by paleo-ice-streams in the Ross Sea, Antarctica. The ice core is part of the Roosevelt Island Climate Evolution (RICE) project and provides new information about the past configuration of the West Antarctic Ice Sheet (WAIS) and its retreat during the last deglaciation. In this work we present the RICE17 chronology, which establishes the depth-age relationship for the top 754m of the 763m core. RICE17 is a composite chronology combining annual layer interpretations for 0-343m (Winstrup et al., 2019) with new estimates for gas and ice ages based on synchronization of CH4 and delta O-18(atm) records to corresponding records from the WAIS Divide ice core and by modeling of the gas age-ice age difference.Novel aspects of this work include the following: (1) an automated algorithm for multiproxy stratigraphic synchronization of high-resolution gas records; (2) synchronization using centennial-scale variations in methane for preanthropogenic time periods (60-720 m, 1971 CE to 30 ka), a strategy applicable for future ice cores; and (3) the observation of a continuous climate record back to similar to 65 ka providing evidence that the Roosevelt Island Ice Dome was a constant feature throughout the last glacial period.

Published
2020

11. Assessing Curriculum Agility in a CDIO Engineering Education

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

Change and individualization are two aspects that are important in innovative higher education. In this paper, we argue for how the concept of curriculum agility can be used as a framework for engineering education that is able to meet societal, environmental, and technological challenges. In order to both anticipate and meet the needs of the rapidly changing world, engineering education needs to have an organization that allows for innovation, change and adaptation, with the capacity to respond within a (much) shorter timeframe than traditionally seen in higher education. The structure and processes of such organizations should include the time needed to establish and decommission new educational programmes, and the flexibility within the programmes. The CDIO’s Curriculum Agility Working Group has defined seven principles for curriculum agility and has analysed how these relate to the CDIOStandards. This paper describes how the principles can provide guidance on both a curricular and institutional level. The principles are mapped against the CDIO Standards, relating to what is required for an agile curriculum, in order to indicate how the Standards can be utilized to assess the flexibility and agility of educational programmes., Part of proceedings: ISBN 978-91-88041-27-2QC 20210218

Published
2020

12. Assessing Curriculum Agility in a CDIO Engineering Education

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

Change and individualization are two aspects that are important in innovative higher education. In this paper, we argue for how the concept of curriculum agility can be used as a framework for engineering education that is able to meet societal, environmental, and technological challenges. In order to both anticipate and meet the needs of the rapidly changing world, engineering education needs to have an organization that allows for innovation, change and adaptation, with the capacity to respond within a (much) shorter timeframe than traditionally seen in higher education. The structure and processes of such organizations should include the time needed to establish and decommission new educational programmes, and the flexibility within the programmes. The CDIO’s Curriculum Agility Working Group has defined seven principles for curriculum agility and has analysed how these relate to the CDIOStandards. This paper describes how the principles can provide guidance on both a curricular and institutional level. The principles are mapped against the CDIO Standards, relating to what is required for an agile curriculum, in order to indicate how the Standards can be utilized to assess the flexibility and agility of educational programmes., Part of proceedings: ISBN 978-91-88041-27-2QC 20210218

Published
2020

13. Assessing Curriculum Agility in a CDIO Engineering Education

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

Change and individualization are two aspects that are important in innovative higher education. In this paper, we argue for how the concept of curriculum agility can be used as a framework for engineering education that is able to meet societal, environmental, and technological challenges. In order to both anticipate and meet the needs of the rapidly changing world, engineering education needs to have an organization that allows for innovation, change and adaptation, with the capacity to respond within a (much) shorter timeframe than traditionally seen in higher education. The structure and processes of such organizations should include the time needed to establish and decommission new educational programmes, and the flexibility within the programmes. The CDIO’s Curriculum Agility Working Group has defined seven principles for curriculum agility and has analysed how these relate to the CDIOStandards. This paper describes how the principles can provide guidance on both a curricular and institutional level. The principles are mapped against the CDIO Standards, relating to what is required for an agile curriculum, in order to indicate how the Standards can be utilized to assess the flexibility and agility of educational programmes., Part of proceedings: ISBN 978-91-88041-27-2QC 20210218

Published
2020

14. An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica

Author

Lee, James E., Brook, Edward J., Bertler, Nancy A. N., Buizert, Christo, Baisden, Troy, Blunier, Thomas, Ciobanu, V. Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Fudge, Tyler J., Hindmarsh, Richard, Keller, Elizabeth D., Parrenin, Frederic, Severinghaus, Jeffrey P., Vallelonga, Paul, Waddington, Edwin D., Winstrup, Mai, Lee, James E., Brook, Edward J., Bertler, Nancy A. N., Buizert, Christo, Baisden, Troy, Blunier, Thomas, Ciobanu, V. Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Fudge, Tyler J., Hindmarsh, Richard, Keller, Elizabeth D., Parrenin, Frederic, Severinghaus, Jeffrey P., Vallelonga, Paul, Waddington, Edwin D., and Winstrup, Mai

Abstract

In 2013 an ice core was recovered from Roosevelt Island, an ice dome between two submarine troughs carved by paleo-ice-streams in the Ross Sea, Antarctica. The ice core is part of the Roosevelt Island Climate Evolution (RICE) project and provides new information about the past configuration of the West Antarctic Ice Sheet (WAIS) and its retreat during the last deglaciation. In this work we present the RICE17 chronology, which establishes the depth-age relationship for the top 754m of the 763m core. RICE17 is a composite chronology combining annual layer interpretations for 0-343m (Winstrup et al., 2019) with new estimates for gas and ice ages based on synchronization of CH4 and delta O-18(atm) records to corresponding records from the WAIS Divide ice core and by modeling of the gas age-ice age difference.Novel aspects of this work include the following: (1) an automated algorithm for multiproxy stratigraphic synchronization of high-resolution gas records; (2) synchronization using centennial-scale variations in methane for preanthropogenic time periods (60-720 m, 1971 CE to 30 ka), a strategy applicable for future ice cores; and (3) the observation of a continuous climate record back to similar to 65 ka providing evidence that the Roosevelt Island Ice Dome was a constant feature throughout the last glacial period.

Published
2020

15. Back to the Future: Using Long-Term Observational and Paleo-Proxy Reconstructions to Improve Model Projections of Antarctic Climate

Author

Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., Wainer, Ilana, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., and Wainer, Ilana

Abstract

Quantitative estimates of future Antarctic climate change are derived from numerical global climate models. Evaluation of the reliability of climate model projections involves many lines of evidence on past performance combined with knowledge of the processes that need to be represented. Routine model evaluation is mainly based on the modern observational period, which started with the establishment of a network of Antarctic weather stations in 1957/58. This period is too short to evaluate many fundamental aspects of the Antarctic and Southern Ocean climate system, such as decadal-to-century time-scale climate variability and trends. To help address this gap, we present a new evaluation of potential ways in which long-term observational and paleo-proxy reconstructions may be used, with a particular focus on improving projections. A wide range of data sources and time periods is included, ranging from ship observations of the early 20th century to ice core records spanning hundreds to hundreds of thousands of years to sediment records dating back 34 million years. We conclude that paleo-proxy records and long-term observational datasets are an underused resource in terms of strategies for improving Antarctic climate projections for the 21st century and beyond. We identify priorities and suggest next steps to addressing this.

Published
2019

16. A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica

Author

Winstrup, Mai, Vallelonga, Paul, Kjær, Helle A., Fudge, Tyler J., Lee, James E., Riis, Marie H., Edwards, Ross, Bertler, Nancy A.N., Blunier, Thomas, Brook, Ed J., Buizert, Christo, Ciobanu, Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Ellis, Aja, Emanuelsson, B. Daniel, Hindmarsh, Richard C.A., Keller, Elizabeth D., Kurbatov, Andrei V., Mayewski, Paul A., Neff, Peter D., Pyne, Rebecca L., Simonsen, Marius F., Svensson, Anders, Tuohy, Andrea, Waddington, Edwin D., Wheatley, Sarah, Winstrup, Mai, Vallelonga, Paul, Kjær, Helle A., Fudge, Tyler J., Lee, James E., Riis, Marie H., Edwards, Ross, Bertler, Nancy A.N., Blunier, Thomas, Brook, Ed J., Buizert, Christo, Ciobanu, Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Ellis, Aja, Emanuelsson, B. Daniel, Hindmarsh, Richard C.A., Keller, Elizabeth D., Kurbatov, Andrei V., Mayewski, Paul A., Neff, Peter D., Pyne, Rebecca L., Simonsen, Marius F., Svensson, Anders, Tuohy, Andrea, Waddington, Edwin D., and Wheatley, Sarah

Abstract

ice core, Ross Ice Shelf, West Antarctica. The core adds information on past accumulation changes in an otherwise poorly constrained sector of Antarctica. The timescale was constructed by identifying annual cycles in high-resolution impurity records, and it constitutes the top part of the Roosevelt Island Ice Core Chronology 2017 (RICE17). Validation by volcanic and methane matching to the WD2014 chronology from the WAIS Divide ice core shows that the two timescales are in excellent agreement. In a companion paper, gas matching to WAIS Divide is used to extend the timescale for the deeper part of the core in which annual layers cannot be identified. Based on the annually resolved timescale, we produced a record of past snow accumulation at Roosevelt Island. The accumulation history shows that Roosevelt Island experienced slightly increasing accumulation rates between 700 BCE and 1300 CE, with an average accumulation of 0.25±0.02 m water equivalent (w.e.) per year. Since 1300 CE, trends in the accumulation rate have been consistently negative, with an acceleration in the rate of decline after the mid-17th century. The current accumulation rate at Roosevelt Island is 0.210±0.002 m w.e. yr−1 (average since 1965 CE, ±2σ), and it is rapidly declining with a trend corresponding to 0.8 mm yr−2. The decline observed since the mid-1960s is 8 times faster than the long-term decreasing trend taking place over the previous centuries, with decadal mean accumulation rates consistently being below average. Previous research has shown a strong link between Roosevelt Island accumulation rates and the location and intensity of the Amundsen Sea Low, which has a significant impact on regional sea-ice extent. The decrease in accumulation rates at Roosevelt Island may therefore be explained in terms of a recent strengthening of the ASL and the expansion of sea ice in the eastern Ross Sea. The start of the rapid decrease in RICE accumulation rates observed in 1965 CE may thus mark the ons

Published
2019

17. Back to the Future: Using Long-Term Observational and Paleo-Proxy Reconstructions to Improve Model Projections of Antarctic Climate

Author

Sub Dynamics Meteorology, Marine and Atmospheric Research, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., Wainer, Ilana, Sub Dynamics Meteorology, Marine and Atmospheric Research, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., and Wainer, Ilana

Published
2019

18. Back to the Future: Using long-term observational and paleo-proxy reconstructions to improve model projections of Antarctic climate

Author

Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A.N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goose, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., Wainer, Ilana, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A.N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goose, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., and Wainer, Ilana

Abstract

Quantitative estimates of future Antarctic climate change are derived from numerical global climate models. Evaluation of the reliability of climate model projections involves many lines of evidence on past performance combined with knowledge of the processes that need to be represented. Routine model evaluation is mainly based on the modern observational period, which started with the establishment of a network of Antarctic weather stations in 1957/58. This period is too short to evaluate many fundamental aspects of the Antarctic and Southern Ocean climate system, such as decadal-to-century time-scale climate variability and trends. To help address this gap, we present a new evaluation of potential ways in which long-term observational and paleo-proxy reconstructions may be used, with a particular focus on improving projections. A wide range of data sources and time periods is included, ranging from ship observations of the early 20th century to ice core records spanning hundreds to hundreds of thousands of years to sediment records dating back 34 million years. We conclude that paleo-proxy records and long-term observational datasets are an underused resource in terms of strategies for improving Antarctic climate projections for the 21st century and beyond. We identify priorities and suggest next steps to addressing this.

Published
2019

19. Global environmental consequences of 21st century ice sheet melt

Author

Golledge, Nicholas R, Keller, Elizabeth D, Gomez, Natalya, Naughten, Kaitlin, Bernales, Jorge, Trusel, Luke D, Edwards, Tamsin L, Golledge, Nicholas R, Keller, Elizabeth D, Gomez, Natalya, Naughten, Kaitlin, Bernales, Jorge, Trusel, Luke D, and Edwards, Tamsin L

Abstract

Government policies currently commit us to surface warming of three to four degrees Celsius above pre-industrial levels by 2100, which will lead to enhanced ice-sheet melt. Ice-sheet discharge was not explicitly included in Coupled Model Intercomparison Project phase 5, so effects on climate from this melt are not currently captured in the simulations most commonly used to inform governmental policy. Here we show, using simulations of the Greenland and Antarctic ice sheets constrained by satellite-based measurements of recent changes in ice mass, that increasing meltwater from Greenland will lead to substantial slowing of the Atlantic overturning circulation, and that meltwater from Antarctica will trap warm water below the sea surface, creating a positive feedback that increases Antarctic ice loss. In our simulations, future ice-sheet melt enhances global temperature variability and contributes up to 25 centimetres to sea level by 2100. However, uncertainties in the way in which future changes in ice dynamics are modelled remain, underlining the need for continued observations and comprehensive multi-model assessments.

Published
2019

20. Back to the Future: Using Long-Term Observational and Paleo-Proxy Reconstructions to Improve Model Projections of Antarctic Climate

Author

Sub Dynamics Meteorology, Marine and Atmospheric Research, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., Wainer, Ilana, Sub Dynamics Meteorology, Marine and Atmospheric Research, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., and Wainer, Ilana

Published
2019

21. Back to the Future: Using Long-Term Observational and Paleo-Proxy Reconstructions to Improve Model Projections of Antarctic Climate

Author

Sub Dynamics Meteorology, Marine and Atmospheric Research, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., Wainer, Ilana, Sub Dynamics Meteorology, Marine and Atmospheric Research, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A. N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goosse, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., and Wainer, Ilana

Published
2019

22. Back to the Future: Using long-term observational and paleo-proxy reconstructions to improve model projections of Antarctic climate

Author

Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A.N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goose, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., Wainer, Ilana, Bracegirdle, Thomas J., Colleoni, Florence, Abram, Nerilie J., Bertler, Nancy A.N., Dixon, Daniel A., England, Mark, Favier, Vincent, Fogwill, Chris J., Fyfe, John C., Goodwin, Ian, Goose, Hugues, Hobbs, Will, Jones, Julie M., Keller, Elizabeth D., Khan, Alia L., Phipps, Steven J., Raphael, Marilyn N., Russell, Joellen, Sime, Louise, Thomas, Elizabeth R., van den Broeke, Michiel R., and Wainer, Ilana

Abstract

Quantitative estimates of future Antarctic climate change are derived from numerical global climate models. Evaluation of the reliability of climate model projections involves many lines of evidence on past performance combined with knowledge of the processes that need to be represented. Routine model evaluation is mainly based on the modern observational period, which started with the establishment of a network of Antarctic weather stations in 1957/58. This period is too short to evaluate many fundamental aspects of the Antarctic and Southern Ocean climate system, such as decadal-to-century time-scale climate variability and trends. To help address this gap, we present a new evaluation of potential ways in which long-term observational and paleo-proxy reconstructions may be used, with a particular focus on improving projections. A wide range of data sources and time periods is included, ranging from ship observations of the early 20th century to ice core records spanning hundreds to hundreds of thousands of years to sediment records dating back 34 million years. We conclude that paleo-proxy records and long-term observational datasets are an underused resource in terms of strategies for improving Antarctic climate projections for the 21st century and beyond. We identify priorities and suggest next steps to addressing this.

Published
2019

23. Global environmental consequences of 21st century ice sheet melt

Author

Golledge, Nicholas R, Keller, Elizabeth D, Gomez, Natalya, Naughten, Kaitlin, Bernales, Jorge, Trusel, Luke D, Edwards, Tamsin L, Golledge, Nicholas R, Keller, Elizabeth D, Gomez, Natalya, Naughten, Kaitlin, Bernales, Jorge, Trusel, Luke D, and Edwards, Tamsin L

Abstract

Government policies currently commit us to surface warming of three to four degrees Celsius above pre-industrial levels by 2100, which will lead to enhanced ice-sheet melt. Ice-sheet discharge was not explicitly included in Coupled Model Intercomparison Project phase 5, so effects on climate from this melt are not currently captured in the simulations most commonly used to inform governmental policy. Here we show, using simulations of the Greenland and Antarctic ice sheets constrained by satellite-based measurements of recent changes in ice mass, that increasing meltwater from Greenland will lead to substantial slowing of the Atlantic overturning circulation, and that meltwater from Antarctica will trap warm water below the sea surface, creating a positive feedback that increases Antarctic ice loss. In our simulations, future ice-sheet melt enhances global temperature variability and contributes up to 25 centimetres to sea level by 2100. However, uncertainties in the way in which future changes in ice dynamics are modelled remain, underlining the need for continued observations and comprehensive multi-model assessments.

Published
2019

24. A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica

Author

Winstrup, Mai, Vallelonga, Paul, Kjaer, Helle A., Fudge, Tyler J., Lee, James E., Riis, Marie H., Edwards, Ross, Bertler, Nancy A. N., Blunier, Thomas, Brook, Ed J., Buizert, Christo, Ciobanu, Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Ellis, Aja, Emanuelsson, B. Daniel, Hindmarsh, Richard C. A., Keller, Elizabeth D., Kurbatov, Andrei V., Mayewski, Paul A., Neff, Peter D., Pyne, Rebecca L., Simonsen, Marius F., Svensson, Anders, Tuohy, Andrea, Waddington, Edwin D., Wheatley, Sarah, Winstrup, Mai, Vallelonga, Paul, Kjaer, Helle A., Fudge, Tyler J., Lee, James E., Riis, Marie H., Edwards, Ross, Bertler, Nancy A. N., Blunier, Thomas, Brook, Ed J., Buizert, Christo, Ciobanu, Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Ellis, Aja, Emanuelsson, B. Daniel, Hindmarsh, Richard C. A., Keller, Elizabeth D., Kurbatov, Andrei V., Mayewski, Paul A., Neff, Peter D., Pyne, Rebecca L., Simonsen, Marius F., Svensson, Anders, Tuohy, Andrea, Waddington, Edwin D., and Wheatley, Sarah

Published
2019

25. A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica

Author

Winstrup, Mai, Vallelonga, Paul, Kjaer, Helle A., Fudge, Tyler J., Lee, James E., Riis, Marie H., Edwards, Ross, Bertler, Nancy A. N., Blunier, Thomas, Brook, Ed J., Buizert, Christo, Ciobanu, Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Ellis, Aja, Emanuelsson, B. Daniel, Hindmarsh, Richard C. A., Keller, Elizabeth D., Kurbatov, Andrei V., Mayewski, Paul A., Neff, Peter D., Pyne, Rebecca L., Simonsen, Marius F., Svensson, Anders, Tuohy, Andrea, Waddington, Edwin D., Wheatley, Sarah, Winstrup, Mai, Vallelonga, Paul, Kjaer, Helle A., Fudge, Tyler J., Lee, James E., Riis, Marie H., Edwards, Ross, Bertler, Nancy A. N., Blunier, Thomas, Brook, Ed J., Buizert, Christo, Ciobanu, Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Ellis, Aja, Emanuelsson, B. Daniel, Hindmarsh, Richard C. A., Keller, Elizabeth D., Kurbatov, Andrei V., Mayewski, Paul A., Neff, Peter D., Pyne, Rebecca L., Simonsen, Marius F., Svensson, Anders, Tuohy, Andrea, Waddington, Edwin D., and Wheatley, Sarah

Published
2019

26. Introducing Global Competence in Swedish Engineering Education

Author

Kjellgren, Björn, Keller, Elizabeth, Kjellgren, Björn, and Keller, Elizabeth

Abstract

This innovative practice work in progress paper describes a recently launched university-wide initiative to strengthen global competence education at Sweden’s largest technical university, KTH Royal Institute of Technology. Current engineering education is expected to equip graduates with the skills needed to work effectively and ethically in environments characterized by social and cultural diversity. While this is commonly agreed on, adjusting program curricula to meet this need has proven to be a challenging task. To address this issue in a pragmatic way, KTH decided in 2016 to introduce an extra-curricular Certificate of Global Competence as a non-intrusive way of complementing existing programs. The certificate is made up of two courses and an international experience. This initiative has been designed to not only help students develop global competence but also to encourage and ensure quality in international mobility. As the certificate courses are elective for all programs at the university, students are presented with an opportunity to work closely together with people from different programs and backgrounds. This fosters cross-disciplinary understanding and encourages international-ization at home. The novelty of the certificate—nothing like it existed at any Swedish university—created uncertainty at the top management level. Even though one of the advantages of the certificate was the fact that it would strengthen the university’s global competence education while leaving existing programs untouched, the validation process took more than two years. However, the final result was that this bottom-up initiative is now endorsed by top management and part of the university’s internationalization endeavors. This paper presents the process of introducing the certificate as well as initial findings from the first courses, plans to extend the global competence initiative to faculty members and make the certificate an integral part of the university’s overall inter, QC 20190513

Published
2018
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28. The Ross Sea Dipole - temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

Author

Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anais, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, V Holly L, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anais, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, V Holly L, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (RICE) ice core. Comparison of this record with climate reanalysis data for the 1979–2012 interval shows that RICE reliably captures temperature and snow precipitation variability in the region. Trends over the past 2700 years in RICE are shown to be distinct from those in West Antarctica and the western Ross Sea captured by other ice cores. For most of this interval, the eastern Ross Sea was warming (or showing isotopic enrichment for other reasons), with increased snow accumulation and perhaps decreased sea ice concentration. However, West Antarctica cooled and the western Ross Sea showed no significant isotope temperature trend. This pattern here is referred to as the Ross Sea Dipole. Notably, during the Little Ice Age, West Antarctica and the western Ross Sea experienced colder than average temperatures, while the eastern Ross Sea underwent a period of warming or increased isotopic enrichment. From the 17th century onwards, this dipole relationship changed. All three regions show current warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea but increasing in the western Ross Sea. We interpret this pattern as reflecting an increase in sea ice in the eastern Ross Sea with perhaps the establishment of a modern Roosevelt Island polynya as a local moisture source for RICE.

Published
2018

29. The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

Author

Bertler, N, Conway, H, Dahl-Jensen, D, Emanuelsson, D, Winstrup, M, Vallelonga, P, Lee, J, Brook, E, Severinghaus, J, Fudge, T, Keller, E, Troy Baisden, W, Hindmarsh, R, Neff, P, Blunier, T, Edwards, R, Mayewski, P, Kipfstuhl, S, Buizert, C, Canessa, S, Dadic, R, Kjær, H, Kurbatov, A, Zhang, D, Waddington, E, Baccolo, G, Beers, T, Brightley, H, Carter, L, Clemens-Sewall, D, Ciobanu, V, Delmonte, B, Eling, L, Ellis, A, Ganesh, S, Golledge, N, Haines, S, Handley, M, Hawley, R, Hogan, C, Johnson, K, Korotkikh, E, Lowry, D, Mandeno, D, Mckay, R, Menking, J, Naish, T, Noerling, C, Ollive, A, Orsi, A, Proemse, B, Pyne, A, Pyne, R, Renwick, J, Scherer, R, Semper, S, Simonsen, M, Sneed, S, Steig, E, Tuohy, A, Ulayottil Venugopal, A, Valero-Delgado, F, Venkatesh, J, Wang, F, Wang, S, Winski, D, Holly, W, Whiteford, A, Xiao, C, Yang, J, Zhang, X, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Troy Baisden, W., Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Holly, Winton, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, N, Conway, H, Dahl-Jensen, D, Emanuelsson, D, Winstrup, M, Vallelonga, P, Lee, J, Brook, E, Severinghaus, J, Fudge, T, Keller, E, Troy Baisden, W, Hindmarsh, R, Neff, P, Blunier, T, Edwards, R, Mayewski, P, Kipfstuhl, S, Buizert, C, Canessa, S, Dadic, R, Kjær, H, Kurbatov, A, Zhang, D, Waddington, E, Baccolo, G, Beers, T, Brightley, H, Carter, L, Clemens-Sewall, D, Ciobanu, V, Delmonte, B, Eling, L, Ellis, A, Ganesh, S, Golledge, N, Haines, S, Handley, M, Hawley, R, Hogan, C, Johnson, K, Korotkikh, E, Lowry, D, Mandeno, D, Mckay, R, Menking, J, Naish, T, Noerling, C, Ollive, A, Orsi, A, Proemse, B, Pyne, A, Pyne, R, Renwick, J, Scherer, R, Semper, S, Simonsen, M, Sneed, S, Steig, E, Tuohy, A, Ulayottil Venugopal, A, Valero-Delgado, F, Venkatesh, J, Wang, F, Wang, S, Winski, D, Holly, W, Whiteford, A, Xiao, C, Yang, J, Zhang, X, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Troy Baisden, W., Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Holly, Winton, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (RICE) ice core. Comparison of this record with climate reanalysis data for the 1979-2012 interval shows that RICE reliably captures temperature and snow precipitation variability in the region. Trends over the past 2700 years in RICE are shown to be distinct from those in West Antarctica and the western Ross Sea captured by other ice cores. For most of this interval, the eastern Ross Sea was warming (or showing isotopic enrichment for other reasons), with increased snow accumulation and perhaps decreased sea ice concentration. However, West Antarctica cooled and the western Ross Sea showed no significant isotope temperature trend. This pattern here is referred to as the Ross Sea Dipole. Notably, during the Little Ice Age, West Antarctica and the western Ross Sea experienced colder than average temperatures, while the eastern Ross Sea underwent a period of warming or increased isotopic enrichment. From the 17th century onwards, this dipole relationship changed. All three regions show current warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea but increasing in the western Ross Sea. We interpret this pattern as reflecting an increase in sea ice in the eastern Ross Sea with perhaps the establishment of a modern Roosevelt Island polynya as a local moisture source for RICE

Published
2018

30. The Ross Sea Dipole - temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 Years

Author

Bertler, Nancy A.N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C.A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H.L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy A.N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C.A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H.L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979–2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past 2,700 years, the eastern Ross Sea was warming with perhaps increased snow accumulation and decreased sea ice extent. However, West Antarctica cooled whereas the western Ross Sea showed no significant temperature trend. From the 17th Century onwards, this relationship changes. All three regions now show signs of warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea, but increasing in the western Ross Sea. Analysis of decadal to centennial-scale climate variability superimposed on the longer term trend reveal that periods characterised by opposing temperature trends between the Eastern and Western Ross Sea have occurred since the 3rd Century but are masked by longer-term trends. This pattern here is referred to as the Ross Sea Dipole, caused by a sensitive response of the region to dynamic interactions of the Southern Annual Mode and tropical forcings.

Published
2018

31. The Ross Sea Dipole - temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

Author

Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anais, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, V Holly L, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anais, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, V Holly L, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (RICE) ice core. Comparison of this record with climate reanalysis data for the 1979–2012 interval shows that RICE reliably captures temperature and snow precipitation variability in the region. Trends over the past 2700 years in RICE are shown to be distinct from those in West Antarctica and the western Ross Sea captured by other ice cores. For most of this interval, the eastern Ross Sea was warming (or showing isotopic enrichment for other reasons), with increased snow accumulation and perhaps decreased sea ice concentration. However, West Antarctica cooled and the western Ross Sea showed no significant isotope temperature trend. This pattern here is referred to as the Ross Sea Dipole. Notably, during the Little Ice Age, West Antarctica and the western Ross Sea experienced colder than average temperatures, while the eastern Ross Sea underwent a period of warming or increased isotopic enrichment. From the 17th century onwards, this dipole relationship changed. All three regions show current warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea but increasing in the western Ross Sea. We interpret this pattern as reflecting an increase in sea ice in the eastern Ross Sea with perhaps the establishment of a modern Roosevelt Island polynya as a local moisture source for RICE.

Published
2018

32. The Ross Sea Dipole - temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 Years

Author

Bertler, Nancy A.N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C.A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H.L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy A.N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C.A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H.L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979–2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past 2,700 years, the eastern Ross Sea was warming with perhaps increased snow accumulation and decreased sea ice extent. However, West Antarctica cooled whereas the western Ross Sea showed no significant temperature trend. From the 17th Century onwards, this relationship changes. All three regions now show signs of warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea, but increasing in the western Ross Sea. Analysis of decadal to centennial-scale climate variability superimposed on the longer term trend reveal that periods characterised by opposing temperature trends between the Eastern and Western Ross Sea have occurred since the 3rd Century but are masked by longer-term trends. This pattern here is referred to as the Ross Sea Dipole, caused by a sensitive response of the region to dynamic interactions of the Southern Annual Mode and tropical forcings.

Published
2018

33. The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

Author

Bertler, N, Conway, H, Dahl-Jensen, D, Emanuelsson, D, Winstrup, M, Vallelonga, P, Lee, J, Brook, E, Severinghaus, J, Fudge, T, Keller, E, Troy Baisden, W, Hindmarsh, R, Neff, P, Blunier, T, Edwards, R, Mayewski, P, Kipfstuhl, S, Buizert, C, Canessa, S, Dadic, R, Kjær, H, Kurbatov, A, Zhang, D, Waddington, E, Baccolo, G, Beers, T, Brightley, H, Carter, L, Clemens-Sewall, D, Ciobanu, V, Delmonte, B, Eling, L, Ellis, A, Ganesh, S, Golledge, N, Haines, S, Handley, M, Hawley, R, Hogan, C, Johnson, K, Korotkikh, E, Lowry, D, Mandeno, D, Mckay, R, Menking, J, Naish, T, Noerling, C, Ollive, A, Orsi, A, Proemse, B, Pyne, A, Pyne, R, Renwick, J, Scherer, R, Semper, S, Simonsen, M, Sneed, S, Steig, E, Tuohy, A, Ulayottil Venugopal, A, Valero-Delgado, F, Venkatesh, J, Wang, F, Wang, S, Winski, D, Holly, W, Whiteford, A, Xiao, C, Yang, J, Zhang, X, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Troy Baisden, W., Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Holly, Winton, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, N, Conway, H, Dahl-Jensen, D, Emanuelsson, D, Winstrup, M, Vallelonga, P, Lee, J, Brook, E, Severinghaus, J, Fudge, T, Keller, E, Troy Baisden, W, Hindmarsh, R, Neff, P, Blunier, T, Edwards, R, Mayewski, P, Kipfstuhl, S, Buizert, C, Canessa, S, Dadic, R, Kjær, H, Kurbatov, A, Zhang, D, Waddington, E, Baccolo, G, Beers, T, Brightley, H, Carter, L, Clemens-Sewall, D, Ciobanu, V, Delmonte, B, Eling, L, Ellis, A, Ganesh, S, Golledge, N, Haines, S, Handley, M, Hawley, R, Hogan, C, Johnson, K, Korotkikh, E, Lowry, D, Mandeno, D, Mckay, R, Menking, J, Naish, T, Noerling, C, Ollive, A, Orsi, A, Proemse, B, Pyne, A, Pyne, R, Renwick, J, Scherer, R, Semper, S, Simonsen, M, Sneed, S, Steig, E, Tuohy, A, Ulayottil Venugopal, A, Valero-Delgado, F, Venkatesh, J, Wang, F, Wang, S, Winski, D, Holly, W, Whiteford, A, Xiao, C, Yang, J, Zhang, X, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Troy Baisden, W., Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Holly, Winton, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (RICE) ice core. Comparison of this record with climate reanalysis data for the 1979-2012 interval shows that RICE reliably captures temperature and snow precipitation variability in the region. Trends over the past 2700 years in RICE are shown to be distinct from those in West Antarctica and the western Ross Sea captured by other ice cores. For most of this interval, the eastern Ross Sea was warming (or showing isotopic enrichment for other reasons), with increased snow accumulation and perhaps decreased sea ice concentration. However, West Antarctica cooled and the western Ross Sea showed no significant isotope temperature trend. This pattern here is referred to as the Ross Sea Dipole. Notably, during the Little Ice Age, West Antarctica and the western Ross Sea experienced colder than average temperatures, while the eastern Ross Sea underwent a period of warming or increased isotopic enrichment. From the 17th century onwards, this dipole relationship changed. All three regions show current warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea but increasing in the western Ross Sea. We interpret this pattern as reflecting an increase in sea ice in the eastern Ross Sea with perhaps the establishment of a modern Roosevelt Island polynya as a local moisture source for RICE

Published
2018

34. The Ross Sea Dipole - temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

Author

Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Simonsen, Marius, Wang, Shimeng, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Simonsen, Marius, and Wang, Shimeng

Published
2018

35. The Ross Sea Dipole - temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

Author

Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Simonsen, Marius, Wang, Shimeng, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjaer, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Simonsen, Marius, and Wang, Shimeng

Published
2018

36. The Ross Sea Dipole – Temperature, Snow Accumulation and Sea Ice Variability in the Ross Sea Region, Antarctica, over the Past 2,700 Years

Author

Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja A, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar A, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, Victoria HL, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja A, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar A, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, Victoria HL, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979–2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past 2,700 years, the eastern Ross Sea was warming with perhaps increased snow accumulation and decreased sea ice extent. However, West Antarctica cooled whereas the western Ross Sea showed no significant temperature trend. From the 17th Century onwards, this relationship changes. All three regions now show signs of warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea, but increasing in the western Ross Sea. Analysis of decadal to centennial-scale climate variability superimposed on the longer term trend reveal that periods characterised by opposing temperature trends between the Eastern and Western Ross Sea have occurred since the 3rd Century but are masked by longer-term trends. This pattern here is referred to as the Ross Sea Dipole, caused by a sensitive response of the region to dynamic interactions of the Southern Annual Mode and tropical forcings.

Published
2017

37. The Ross Sea Dipole – Temperature, Snow Accumulation and Sea Ice Variability in the Ross Sea Region, Antarctica, over the Past 2,700 Years

Author

Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja A, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar A, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, Victoria HL, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy AN, Bertler, Nancy AN, Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B, Winstrup, Mai, Vallelonga, Paul T, Lee, James E, Brook, Ed J, Severinghaus, Jeffrey P, Fudge, Taylor J, Keller, Elizabeth D, Baisden, W Troy, Hindmarsh, Richard CA, Neff, Peter D, Blunier, Thomas, Edwards, Ross, Mayewski, Paul A, Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A, Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D, Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J, Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G, Delmonte, Barbara, Eling, Lukas, Ellis, Aja A, Ganesh, Shruthi, Golledge, Nicholas R, Haines, Skylar A, Handley, Michael, Hawley, Robert L, Hogan, Chad M, Johnson, Katelyn M, Korotkikh, Elena, Lowry, Daniel P, Mandeno, Darcy, McKay, Robert M, Menking, James A, Naish, Timothy R, Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C, Pyne, Alexander R, Pyne, Rebecca L, Renwick, James, Scherer, Reed P, Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B, Steig, Eric J, Tuohy, Andrea, Ulayottil Venugopal, Abhijith, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A, Winton, Victoria HL, Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Abstract

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979–2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past 2,700 years, the eastern Ross Sea was warming with perhaps increased snow accumulation and decreased sea ice extent. However, West Antarctica cooled whereas the western Ross Sea showed no significant temperature trend. From the 17th Century onwards, this relationship changes. All three regions now show signs of warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea, but increasing in the western Ross Sea. Analysis of decadal to centennial-scale climate variability superimposed on the longer term trend reveal that periods characterised by opposing temperature trends between the Eastern and Western Ross Sea have occurred since the 3rd Century but are masked by longer-term trends. This pattern here is referred to as the Ross Sea Dipole, caused by a sensitive response of the region to dynamic interactions of the Southern Annual Mode and tropical forcings.

Published
2017

38. The Ross Sea Dipole – Temperature, Snow Accumulation and Sea Ice Variability in the Ross Sea Region, Antarctica, over the Past 2,700 Years

Author

Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H. L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H. L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Published
2017

39. The Ross Sea Dipole – Temperature, Snow Accumulation and Sea Ice Variability in the Ross Sea Region, Antarctica, over the Past 2,700 Years

Author

Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H. L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin, Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Ed D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja A., Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar A., Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, Victoria H. L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, and Zhang, Xin

Published
2017

40. Water Mist Suppression in a Turbulent Line Burner

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

An experimental study of water mist fire suppression in a buoyant, turbulent diffusion flame is presented. An existing turbulent line burner facility was modified to allow for water mist suppression. These modifications include streamlining the oxidizer delivery system, facility improvements to increase mist generation efficiency, as well as the addition of a mist containment system and an enhanced exhaust flow to homogenize the water mist in the flame region and reduce secondary flows. Following these improvements, the capabilities of the water mist generation system were characterized both using a classical mass balance approach and using more modern advanced diagnostic techniques. The turbulent line burner facility fitted with the water mist improvements were applied to suppress a 50 kW methane flame. Species-based calorimetry was used to evaluate the global heat release rate and combustion efficiency to evaluate suppression behavior. Detailed local measurements of flame temperature were also performed and provide a useful data set for the evaluation of flame suppression response and for the validation of CFD fire models.

Published
2016

41. Extreme Science

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

Have you ever wondered how tides are created, where the greatest earthquake happened, or how time is measured? All of these and many more questions are answered at this fantastic website created by scientist, Elizabeth Keller. Users can find an abundance of materials on time, weather, space phenomena, and earth science. Within the Gallery of Scientists, users can learn about the work of admirable researchers. Packed with fun statistics and amazing images, this website will help educators get students excited about learning.

42. Extreme Science

Author

Keller, Elizabeth and Keller, Elizabeth

Abstract

Have you ever wondered how tides are created, where the greatest earthquake happened, or how time is measured? All of these and many more questions are answered at this fantastic website created by scientist, Elizabeth Keller. Users can find an abundance of materials on time, weather, space phenomena, and earth science. Within the Gallery of Scientists, users can learn about the work of admirable researchers. Packed with fun statistics and amazing images, this website will help educators get students excited about learning.

43. Local history cards for the Kayser family

Author

Keller, Elizabeth; Kiser, Emma; Keiser, George; Keyser, Paul; Keyseur, Silas, 1861, Bennett, Elaine C., Keller, Elizabeth; Kiser, Emma; Keiser, George; Keyser, Paul; Keyseur, Silas, 1861, and Bennett, Elaine C.

Abstract

This archival material has been provided for educational purposes. Ball State University Libraries recognizes that some historic items may include offensive content. Our statement regarding objectionable content is available at: https://dmr.bsu.edu/digital/about

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