28 results on '"Pope, James O."'
Search Results
2. Future extension of the UK summer and its impact on autumn precipitation
- Author
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Cotterill, Daniel F., Pope, James O., and Stott, Peter A.
- Published
- 2023
- Full Text
- View/download PDF
3. Investigation of future climate change over the British Isles using weather patterns
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Pope, James O., Brown, Kate, Fung, Fai, Hanlon, Helen M., Neal, Robert, Palin, Erika J., and Reid, Anne
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- 2022
- Full Text
- View/download PDF
4. Musical messages – Creating a bespoke climate story for the Outer Hebrides
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Pope, James O., primary, Logan, Matthew, additional, Kennedy, Sandra, additional, MacDonald, Kathleen, additional, Matthews, Alicia, additional, Milne, Kathleen, additional, and Pratt, Eleanor, additional
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- 2023
- Full Text
- View/download PDF
5. The impact of wintertime sea-ice anomalies on high surface heat flux events in the Iceland and Greenland Seas
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Pope, James O., Bracegirdle, Thomas J., Renfrew, Ian A., and Elvidge, Andrew D.
- Published
- 2020
- Full Text
- View/download PDF
6. Multi‐perspective view of the 1976 drought‐heatwave event and its changing likelihood
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Kendon, Elizabeth J., primary, Ciavarella, Andy, additional, McCarthy, Mark, additional, Brown, Simon, additional, Christidis, Nikos, additional, Kay, Gillian, additional, Dunstone, Nick, additional, Fereday, David, additional, and Pope, James O., additional
- Published
- 2023
- Full Text
- View/download PDF
7. Multiperspective view of the 1976 drought–heatwave event and its changing likelihood.
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Kendon, Elizabeth J., Ciavarella, Andy, McCarthy, Mark, Brown, Simon, Christidis, Nikos, Kay, Gillian, Dunstone, Nick, Fereday, David, and Pope, James O.
- Subjects
ATMOSPHERIC temperature ,HOT weather conditions ,RAINFALL ,OCEAN temperature ,ATMOSPHERIC models ,SUMMER ,DROUGHTS - Abstract
1976 was one of the most acute droughts in the UK, exceptional due to the compounding effects of low rainfall and hot summer temperatures. In this study, we provide a multiperspective view of the likelihood of a 1976‐like compound event occurring now and into the future. We find a high level of consistency in the messages emerging across a range of different approaches and climate modelling tools, from convection‐permitting climate projections to decadal hindcasts and global coupled‐model attribution ensembles. 1976 summer average temperatures remain, at the time of writing, amongst the highest on record, but with warming are becoming increasingly common. The nine‐month rainfall deficit to August 1976 was incredibly rare. Analysis here indicates that compound extremes like 1976 are expected to occur on time‐scales of hundreds to thousands of years in the present‐day climate, decreasing slightly into the future. The probability remains very small even if we account for favourable sea surface temperatures and atmospheric circulation that occurred in 1976. Similar but less severe events with a 1% chance of occurring in the present day are five times more frequent from the 2040s under RCP8.5. The occurrence of such compound events is significantly (up to an order of magnitude) higher than expected if temperature and rainfall extremes occurred independently. In general, differences in likelihood estimates between approaches can begin to be understood from how dependence between variables is handled, differences in bias correction, and different levels of conditioning (i.e., the probability given particular atmospheric or ocean states). The appropriate choice of conditioning very much depends on the question being asked and its unconscious use may lead to apparent contradictions. Parallels can be drawn between 1976 and the recent summer of 2022, and results here suggest that with hotter summers we should be prepared for more severe droughts like 1976 in the future. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
8. Multi-model Comparison of the Volcanic Sulfate Deposition from the 1815 Eruption of Mt. Tambora
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Marshall, Lauren, Schmidt, Anja, Toohey, Matthew, Carslaw, Ken S, Mann, Graham W, Sigl, Michael, Khodri, Myriam, Timmreck, Claudia, Zanchettin, Davide, Ball, William T, Bekki, Slimane, Brooke, James S. A, Dhomse, Sandip, Johnson, Colin, Lamarque, Jean-Francois, LeGrande, Allegra N, Mills, Michael J, Niemeier, Ulrike, Pope, James O, Poulain, Virginie, Robock, Alan, Rozanov, Eugene, Stenke, Andrea, Sukhodolov, Timofei, Tilmes, Simone, Tsigaridis, Kostas, and Tummon, Fiona
- Subjects
Geophysics - Abstract
The eruption of Mt. Tambora in 1815 was the largest volcanic eruption of the past 500 years. The eruption had significant climatic impacts, leading to the 1816 "year without a summer", and remains a valuable event from which to understand the climatic effects of large stratospheric volcanic sulfur dioxide injections. The eruption also resulted in one of the strongest and most easily identifiable volcanic sulfate signals in polar ice cores, which are widely used to reconstruct the timing and atmospheric sulfate loading of past eruptions. As part of the Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP), five state-of-the-art global aerosol models simulated this eruption. We analyze both simulated background (no Tambora) and volcanic (with Tambora) sulfate deposition to polar regions and compare to ice core records. The models simulate overall similar patterns of background sulfate deposition, although there are differences in regional details and magnitude. However, the volcanic sulfate deposition varies considerably between the models with differences in timing, spatial pattern and magnitude. Mean simulated deposited sulfate on Antarctica ranges from 19 to 264 kgkm-2 and on Greenland from 31 to 194 kgkm-2, as compared to the mean ice-core derived estimates of roughly 50 kgkm-2 for both Greenland and Antarctica. The ratio of the hemispheric atmospheric sulfate aerosol burden after the eruption to the average ice sheet deposited sulfate varies between models by up to a factor of 15. Sources of this inter-model variability include differences in both the formation and the transport of sulfate aerosol. Our results suggest that deriving relationships between sulfate deposited on ice sheets and atmospheric sulfate burdens from model simulations may be associated with greater uncertainties than previously thought.
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- 2018
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9. The Springtime Influence of Natural Tropical Pacific Variability on the Surface Climate of the Ross Ice Shelf, West Antarctica: Implications for Ice Shelf Thinning
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Clem, Kyle R., Orr, Andrew, and Pope, James O.
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- 2018
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10. Future extension of the UK summer and its impact on autumn precipitation
- Author
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Cotterill, Daniel F., primary, Pope, James O., additional, and Stott, Peter A., additional
- Published
- 2022
- Full Text
- View/download PDF
11. Identifying Weather Patterns Associated with Increased Volcanic Ash Risk within British Isles Airspace
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Harrison, Samuel R., primary, Pope, James O., additional, Neal, Robert A., additional, Garry, Freya K., additional, Kurashina, Ryosuke, additional, and Suri, Dan, additional
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- 2022
- Full Text
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12. On the identification of a Pliocene time slice for data—model comparison
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Haywood, Alan M., Dolan, Aisling M., Pickering, Steven J., Dowsett, Harry J., McClymont, Erin L., Prescott, Caroline L., Salzmann, Ulrich, Hill, Daniel J., Hunter, Stephen J., Lunt, Daniel J., Pope, James O., and Valdes, Paul J.
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- 2013
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13. Investigation of future climate change over the British Isles using weather patterns
- Author
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Pope, James O., primary, Brown, Kate, additional, Fung, Fai, additional, Hanlon, Helen M., additional, Neal, Robert, additional, Palin, Erika J., additional, and Reid, Anne, additional
- Published
- 2021
- Full Text
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14. The Iceland Greenland Seas Project
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Renfrew, Ian A., Pickart, Robert S., Vage, Kjetil, Moore, G. W. K., Bracegirde, Thomas J., Elvidge, Andrew D., Jeansson, Emil, Lachlan-Cope, Thomas, McRaven, Leah T., Papritz, Lukas, Reuder, Joachim, Sodemann, Harald, Terpstra, Annick, Waterman, Stephanie N., Valdimarsson, Héðinn, Weiss, Albert, Almansi, Mattia, Bahr, Frank B., Brakstad, Ailin, Barrell, Christopher, Brooke, Jennifer K., Brooks, Barbara J., Brooks, Ian M., Brooks, Malcolm E., Bruvik, Erik Magnus, Duscha, Christiane, Fer, Ilker, Golid, H. M., Hallerstig, M., Hessevik, Idar, Huang, Jie, Houghton, Leah A., Jonsson, Steingrimur, Jonassen, Marius, Jackson, K., Kvalsund, K., Kolstad, Erik W., Konstali, K., Kristiansen, Jorn, Ladkin, Russell, Lin, Peigen, Macrander, Andreas, Mitchell, Alexandra, Olafsson, H., Pacini, Astrid, Payne, Chris, Palmason, Bolli, Perez-Hernandez, M. Dolores, Peterson, Algot K., Petersen, Guðrún N., Pisareva, Maria N., Pope, James O., Seidl, Andrew D., Semper, Stefanie, Sergeev, Denis, Skjelsvik, Silje, Søiland, Henrik, Smith, D., Spall, Michael A., Spengler, Thomas, Touzeau, Alexandra, Tupper, George H., Weng, Y., Williams, Keith D., Yang, Xiaohau, Zhou, Shenjie, Renfrew, Ian A., Pickart, Robert S., Vage, Kjetil, Moore, G. W. K., Bracegirde, Thomas J., Elvidge, Andrew D., Jeansson, Emil, Lachlan-Cope, Thomas, McRaven, Leah T., Papritz, Lukas, Reuder, Joachim, Sodemann, Harald, Terpstra, Annick, Waterman, Stephanie N., Valdimarsson, Héðinn, Weiss, Albert, Almansi, Mattia, Bahr, Frank B., Brakstad, Ailin, Barrell, Christopher, Brooke, Jennifer K., Brooks, Barbara J., Brooks, Ian M., Brooks, Malcolm E., Bruvik, Erik Magnus, Duscha, Christiane, Fer, Ilker, Golid, H. M., Hallerstig, M., Hessevik, Idar, Huang, Jie, Houghton, Leah A., Jonsson, Steingrimur, Jonassen, Marius, Jackson, K., Kvalsund, K., Kolstad, Erik W., Konstali, K., Kristiansen, Jorn, Ladkin, Russell, Lin, Peigen, Macrander, Andreas, Mitchell, Alexandra, Olafsson, H., Pacini, Astrid, Payne, Chris, Palmason, Bolli, Perez-Hernandez, M. Dolores, Peterson, Algot K., Petersen, Guðrún N., Pisareva, Maria N., Pope, James O., Seidl, Andrew D., Semper, Stefanie, Sergeev, Denis, Skjelsvik, Silje, Søiland, Henrik, Smith, D., Spall, Michael A., Spengler, Thomas, Touzeau, Alexandra, Tupper, George H., Weng, Y., Williams, Keith D., Yang, Xiaohau, and Zhou, Shenjie
- Abstract
© The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Renfrew, I. A., Pickart, R. S., Vage, K., Moore, G. W. K., Bracegirdle, T. J., Elvidge, A. D., Jeansson, E., Lachlan-Cope, T., McRaven, L. T., Papritz, L., Reuder, J., Sodemann, H., Terpstra, A., Waterman, S., Valdimarsson, H., Weiss, A., Almansi, M., Bahr, F., Brakstad, A., Barrell, C., Brooke, J. K., Brooks, B. J., Brooks, I. M., Brooks, M. E., Bruvik, E. M., Duscha, C., Fer, I., Golid, H. M., Hallerstig, M., Hessevik, I., Huang, J., Houghton, L., Jonsson, S., Jonassen, M., Jackson, K., Kvalsund, K., Kolstad, E. W., Konstali, K., Kristiansen, J., Ladkin, R., Lin, P., Macrander, A., Mitchell, A., Olafsson, H., Pacini, A., Payne, C., Palmason, B., Perez-Hernandez, M. D., Peterson, A. K., Petersen, G. N., Pisareva, M. N., Pope, J. O., Seidl, A., Semper, S., Sergeev, D., Skjelsvik, S., Soiland, H., Smith, D., Spall, M. A., Spengler, T., Touzeau, A., Tupper, G., Weng, Y., Williams, K. D., Yang, X., & Zhou, S. The Iceland Greenland Seas Project. Bulletin of the American Meteorological Society, 100(9), (2019): 1795-1817, doi:10.1175/BAMS-D-18-0217.1., The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere–ocean research program investigating climate processes in the source region of the densest waters of the Atlantic meridional overturning circulation. During February and March 2018, a field campaign was executed over the Iceland and southern Greenland Seas that utilized a range of observing platforms to investigate critical processes in the region, including a research vessel, a research aircraft, moorings, sea gliders, floats, and a meteorological buoy. A remarkable feature of the field campaign was the highly coordinated deployment of the observing platforms, whereby the research vessel and aircraft tracks were planned in concert to allow simultaneous sampling of the atmosphere, the ocean, and their interactions. This joint planning was supported by tailor-made convection-permitting weather forecasts and novel diagnostics from an ensemble prediction system. The scientific aims of the IGP are to characterize the atmospheric forcing and the ocean response of coupled processes; in particular, cold-air outbreaks in the vicinity of the marginal ice zone and their triggering of oceanic heat loss, and the role of freshwater in the generation of dense water masses. The campaign observed the life cycle of a long-lasting cold-air outbreak over the Iceland Sea and the development of a cold-air outbreak over the Greenland Sea. Repeated profiling revealed the immediate impact on the ocean, while a comprehensive hydrographic survey provided a rare picture of these subpolar seas in winter. A joint atmosphere–ocean approach is also being used in the analysis phase, with coupled observational analysis and coordinated numerical modeling activities underway., The IGP has received funding from the U.S. National Science Foundation: Grant OCE-1558742; the U.K.’s Natural Environment Research Council: AFIS (NE/N009754/1); the Research Council of Norway: MOCN (231647), VENTILATE (229791), SNOWPACE (262710) and FARLAB (245907); and the Bergen Research Foundation (BFS2016REK01). We thank all those involved in the field work associated with the IGP, particularly the officers and crew of the Alliance, and the operations staff of the aircraft campaign.
- Published
- 2020
15. Non‐additive response of the high‐latitude Southern Hemisphere climate to aerosol forcing in a climate model with interactive chemistry
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Pope, James O., primary, Orr, Andrew, additional, Marshall, Gareth J., additional, and Abraham, Nathan Luke, additional
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- 2020
- Full Text
- View/download PDF
16. The Iceland Greenland Seas Project
- Author
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Renfrew, I. A., Pickart, R. S., Våge, K., Moore, G. W. K., Bracegirdle, Thomas J., Elvidge, A. D., Jeansson, E., Lachlan-Cope, Thomas, McRaven, L.T., Papritz, L., Reuder, J., Sodemann, H., Terpstra, A., Waterman, S., Valdimarsson, H., Weiss, Alexandra, Almansi, M., Bahr, F., Brakstad, A., Barrell, C., Brooke, J. K., Brooks, B.J., Brooks, I. M., Brooks, M. E., Bruvik, E. M., Duscha, C., Fer, I., Golid, H. M., Hallerstig, M., Hessevik, I., Huang, J., Houghton, L., Jónsson, S., Jonassen, M., Jackson, K., Kvalsund, K., Kolstad, E. W., Konstali, K., Kristiansen, J., Ladkin, Russell, Lin, P., Macrander, A., Mitchell, A., Olafsson, H., Pacini, A., Payne, C., Palmason, B., Pérez-Hernández, M. D., Peterson, A. K., Petersen, G. N., Pisareva, M. N., Pope, James O., Seidl, A., Semper, S., Sergeev, D., Skjelsvik, S., Søiland, H., Smith, D., Spall, M. A., Spengler, T., Touzeau, A., Tupper, G., Weng, Y., Williams, K. D., Yang, X., Zhou, S., Renfrew, I. A., Pickart, R. S., Våge, K., Moore, G. W. K., Bracegirdle, Thomas J., Elvidge, A. D., Jeansson, E., Lachlan-Cope, Thomas, McRaven, L.T., Papritz, L., Reuder, J., Sodemann, H., Terpstra, A., Waterman, S., Valdimarsson, H., Weiss, Alexandra, Almansi, M., Bahr, F., Brakstad, A., Barrell, C., Brooke, J. K., Brooks, B.J., Brooks, I. M., Brooks, M. E., Bruvik, E. M., Duscha, C., Fer, I., Golid, H. M., Hallerstig, M., Hessevik, I., Huang, J., Houghton, L., Jónsson, S., Jonassen, M., Jackson, K., Kvalsund, K., Kolstad, E. W., Konstali, K., Kristiansen, J., Ladkin, Russell, Lin, P., Macrander, A., Mitchell, A., Olafsson, H., Pacini, A., Payne, C., Palmason, B., Pérez-Hernández, M. D., Peterson, A. K., Petersen, G. N., Pisareva, M. N., Pope, James O., Seidl, A., Semper, S., Sergeev, D., Skjelsvik, S., Søiland, H., Smith, D., Spall, M. A., Spengler, T., Touzeau, A., Tupper, G., Weng, Y., Williams, K. D., Yang, X., and Zhou, S.
- Abstract
A coordinated atmosphere-ocean research project, centered on a rare wintertime field campaign to the Iceland and Greenland Seas, seeks to determine the location and causes of dense water formation by cold-air outbreaks. The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere-ocean research program investigating climate processes in the source region of the densest waters of the Atlantic Meridional Overturning Circulation. During February and March 2018, a field campaign was executed over the Iceland and southern Greenland Seas that utilized a range of observing platforms to investigate critical processes in the region – including a research vessel, a research aircraft, moorings, sea gliders, floats and a meteorological buoy. A remarkable feature of the field campaign was the highly-coordinated deployment of the observing platforms, whereby the research vessel and aircraft tracks were planned in concert to allow simultaneous sampling of the atmosphere, the ocean and their interactions. This joint planning was supported by tailor-made convection-permitting weather forecasts and novel diagnostics from an ensemble prediction system. The scientific aims of the IGP are to characterize the atmospheric forcing and the ocean response of coupled processes; in particular, cold-air outbreaks in the vicinity of the marginal-ice zone and their triggering of oceanic heat loss, and the role of freshwater in the generation of dense water masses. The campaign observed the lifecycle of a long-lasting cold-air outbreak over the Iceland Sea and the development of a cold-air outbreak over the Greenland Sea. Repeated profiling revealed the immediate impact on the ocean, while a comprehensive hydrographic survey provided a rare picture of these subpolar seas in winter. A joint atmosphere-ocean approach is also being used in the analysis phase, with coupled observational analysis and coordinated numerical modelling activities underway.
- Published
- 2019
17. Response of the Asian summer monsoons to idealized precession and obliquity forcing in a set of GCMs
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Bosmans, J.H.C., Erb, M.P., Dolan, A.M., Drijfhout, S.S., Tuenter, E., Hilgen, F.J., Edge, D., Pope, James O., Lourens, L.J., Bosmans, J.H.C., Erb, M.P., Dolan, A.M., Drijfhout, S.S., Tuenter, E., Hilgen, F.J., Edge, D., Pope, James O., and Lourens, L.J.
- Abstract
We examine the response of the Indian and East Asian summer monsoons to separate precession and obliquity forcing, using a set of fully coupled high-resolution models for the first time: EC-Earth, GFDL CM2.1, CESM and HadCM3. We focus on the effect of insolation changes on monsoon precipitation and underlying circulation changes, and find strong model agreement despite a range of model physics, parameterization, and resolution. Our results show increased summer monsoon precipitation at times of increased summer insolation, i.e. minimum precession and maximum obliquity, accompanied by a redistribution of precipitation and convection from ocean to land. Southerly monsoon winds over East Asia are strengthened as a consequence of an intensified land-sea pressure gradient. The response of the Indian summer monsoon is less straightforward. Over south-east Asia low surface pressure is less pronounced and winds over the northern Indian Ocean are directed more westward. An Indian Ocean Dipole pattern emerges, with increased precipitation and convection over the western Indian Ocean. Increased temperatures occur during minimum precession over the Indian Ocean, but not during maximum obliquity when insolation is reduced over the tropics and southern hemisphere during northern hemisphere summer. Evaporation is reduced over the northern Indian Ocean, which together with increased precipitation over the western Indian Ocean dampens the increase of monsoonal precipitation over the continent. The southern tropical Indian Ocean as well as the western tropical Pacific (for precession) act as a moisture source for enhanced monsoonal precipitation. The models are in closest agreement for precession-induced changes, with more model spread for obliquity-induced changes, possibly related to a smaller insolation forcing. Our results indicate that a direct response of the Indian and East Asian summer monsoons to insolation forcing is possible, in line with speleothem records but in contrast
- Published
- 2018
18. Unprecedented springtime retreat of Antarctic sea ice in 2016
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Turner, John, Phillips, Tony, Marshall, Gareth J., Hosking, J. Scott, Pope, James O., Bracegirdle, Thomas J., and Deb, Pranab
- Abstract
During austral spring 2016 Antarctic sea ice extent (SIE) decreased at a record rate of 75 x 10(3) km(2) d(-1), which was 46% faster than the mean rate and 18% faster than in any previous spring season during the satellite era. The decrease of sea ice area was also exceptional and 28% greater than the mean. Anomalous negative retreat occurred in all sectors of the Antarctic but was greatest in the Weddell and Ross Seas. Record negative SIE anomalies for the day of year were recorded from 3 November 2016 to 9 April 2017. Rapid ice retreat in the Weddell Sea took place in strong northerly flow after an early maximum ice extent in late August. Rapid ice retreat occurred in November in the Ross Sea when surface pressure was at a record high level, with the Southern Annular Mode at its most negative for that month since 1968.
- Published
- 2017
19. The impacts of El Niño on the observed sea ice budget of West Antarctica
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Pope, James O., Holland, Paul R., Orr, Andrew, Marshall, Gareth J., Phillips, Tony, Pope, James O., Holland, Paul R., Orr, Andrew, Marshall, Gareth J., and Phillips, Tony
- Abstract
We assess the impact of El Niño-induced wind changes on seasonal West Antarctic sea ice concentrations using reanalysis data and sea ice observations. A novel ice budget analysis reveals that in autumn a previously identified east-west dipole of sea ice concentration anomalies is formed by dynamic and thermodynamic processes in response to El Niño-generated circulation changes. The dipole features decreased (increased) concentration in the Ross Sea (Amundsen and Bellingshausen Seas). Thermodynamic processes and feedback make a substantial contribution to ice anomalies in all seasons. The eastward propagation of this anomaly is partly driven by mean sea ice drift rather than anomalous winds. Our results demonstrate that linkages between sea ice anomalies and atmospheric variability are highly nonlocal in space and time. Therefore, we assert that caution should be applied when interpreting the results of studies that attribute sea ice changes without accounting for such temporally and spatially remote linkages.
- Published
- 2017
20. An assessment of the Polar Weather Research and Forecast (WRF) model representation of near-surface meteorological variables over West Antarctica
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Deb, Pranab, Orr, Andrew, Hosking, J. Scott, Phillips, Tony, Turner, John, Bannister, Daniel, Pope, James O., and Colwell, Steve
- Abstract
Despite the recent significant climatic changes observed over West Antarctica, which include large warming in central West Antarctica and accelerated ice loss, adequate validation of regional simulations of meteorological variables are rare for this region. To address this gap, results from a recent version of the Polar Weather Research and Forecasting model (Polar WRF) covering West Antarctica at a high horizontal resolution of 5 km were validated against near-surface meteorological observations. The model employed physics options that included the Mellor-Yamada-Nakanishi-Niino (MYNN) boundary layer scheme, the WRF Single Moment 5-Class cloud microphysics scheme, the new version of the Rapid Radiative Transfer Model for both shortwave and longwave radiation, and the Noah land surface model. Our evaluation finds this model to be a useful tool for realistically capturing the near-surface meteorological conditions. It showed high skill in simulating surface pressure (correlation ≥0.97), good skill for wind speed with better correlation at inland sites (0.7-0.8) compared to coastal sites (0.3-0.6), generally good representation of strong wind events, and good skill for temperature in winter (correlation ≥0.8). The main shortcomings of this configuration of Polar WRF are an occasional failure to properly represent transient cyclones and their influence on coastal winds, an amplified diurnal temperature cycle in summer, and a general tendency to underestimate the wind speed at inland sites in summer. Additional sensitivity studies were performed to quantify the impact of the choice of boundary layer scheme and surface boundary conditions. It is shown that the model is most sensitive to the choice of boundary layer scheme, with the representation of the temperature diurnal cycle in summer significantly improved by selecting the Mellor-Yamada-Janjic boundary layer scheme. By contrast, the model results showed little sensitivity to whether the horizontal resolution was 5 or 15 km.
- Published
- 2016
21. Unprecedented springtime retreat of Antarctic sea ice in 2016
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Turner, John, primary, Phillips, Tony, additional, Marshall, Gareth J., additional, Hosking, J. Scott, additional, Pope, James O., additional, Bracegirdle, Thomas J., additional, and Deb, Pranab, additional
- Published
- 2017
- Full Text
- View/download PDF
22. The impacts of El Niño on the observed sea ice budget of West Antarctica
- Author
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Pope, James O., primary, Holland, Paul R., additional, Orr, Andrew, additional, Marshall, Gareth J., additional, and Phillips, Tony, additional
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- 2017
- Full Text
- View/download PDF
23. Assessing orbitally-forced interglacial climate variability during the mid-Pliocene Warm Period
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Prescott, Caroline L., Haywood, Alan M., Dolan, Aisling M., Hunter, Stephen J., Pope, James O., and Pickering, Steven J.
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- 2014
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- View/download PDF
24. An assessment of the Polar Weather Research and Forecasting (WRF) model representation of near-surface meteorological variables over West Antarctica
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Deb, Pranab, primary, Orr, Andrew, additional, Hosking, J. Scott, additional, Phillips, Tony, additional, Turner, John, additional, Bannister, Daniel, additional, Pope, James O., additional, and Colwell, Steve, additional
- Published
- 2016
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25. Can uncertainties in sea ice albedo reconcile patterns of data-model discord for the Pliocene and 20th/21st centuries?
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Howell, Fergus W., Haywood, Alan M., Dolan, Aisling M., Dowsett, Harry J., Francis, Jane E., Hill, Daniel J., Pickering, Steven J., Pope, James O., Salzmann, Ulrich, Wade, Bridget S., Howell, Fergus W., Haywood, Alan M., Dolan, Aisling M., Dowsett, Harry J., Francis, Jane E., Hill, Daniel J., Pickering, Steven J., Pope, James O., Salzmann, Ulrich, and Wade, Bridget S.
- Abstract
General Circulation Model simulations of the mid-Pliocene warm period (mPWP, 3.264 to 3.025 Myr ago) currently underestimate the level of warming that proxy data suggest existed at high latitudes, with discrepancies of up to 11°C for sea surface temperature estimates and 17°C for surface air temperature estimates. Sea ice has a strong influence on high-latitude climates, partly due to the albedo feedback. We present results demonstrating the effects of reductions in minimum sea ice albedo limits in general circulation model simulations of the mPWP. While mean annual surface air temperature increases of up to 6°C are observed in the Arctic, the maximum decrease in model-data discrepancies is just 0.81°C. Mean annual sea surface temperatures increase by up to 2°C, with a maximum model-data discrepancy improvement of 1.31°C. It is also suggested that the simulation of observed 21st century sea ice decline could be influenced by the adjustment of the sea ice albedo parameterization.
- Published
- 2014
26. Can uncertainties in sea ice albedo reconcile patterns of data-model discord for the Pliocene and 20th/21st centuries?
- Author
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Howell, Fergus W., primary, Haywood, Alan M., additional, Dolan, Aisling M., additional, Dowsett, Harry J., additional, Francis, Jane E., additional, Hill, Daniel J., additional, Pickering, Steven J., additional, Pope, James O., additional, Salzmann, Ulrich, additional, and Wade, Bridget S., additional
- Published
- 2014
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27. Quantifying Uncertainty in Model Predictions for the Pliocene (Plio-QUMP): Initial results
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Pope, James O., primary, Collins, Matthew, additional, Haywood, Alan M., additional, Dowsett, Harry J., additional, Hunter, Stephen J., additional, Lunt, Daniel J., additional, Pickering, Steven J., additional, and Pound, Matthew J., additional
- Published
- 2011
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28. The Iceland Greenland Seas Project
- Author
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Renfrew, Ian A., Pickart, Robert S., Våge, Kjetil, Moore, George W.K., Bracegirdle, Thomas J., Elvidge, Andrew D., Jeansson, Emil, Lachlan-Cope, Tom A., McRaven, Leah T., Papritz, Lukas, Reuder, Joachim, Sodemann, Harald, Terpstra, Annick, Waterman, Stephanie N., Valdimarsson, Héđinn, Weiss, Alexandra, Almansi, Mattia, Bahr, Frank B., Brakstad, Ailin, Barrell, C., Brooke, Jennifer K., Brooks, Barbara J., Brooks, Ian M., Brooks, Malcolm E., Bruvik, Erik M., Duscha, C., Fer, Ilker, Hallerstig, M., Hessevik, Idar, Huang, Jie, Houghton, Leah A., Jónsson, Steingrímur, Jonassen, Marius O., Jackson, K., Kvalsund, Karsten, Kolstad, Erik W., Konstali, K., Kristiansen, Jørn, Ladkin, Russell, Lin, Peigen, MacRander, Andreas, Mitchell, A., Ólafsson, Haraldur, Pacini, Astrid, Payne, C., Palmason, B., Pérez-Hernández, María D., Peterson, Algot K., Petersen, Gudrún N., Pisareva, Maria N., Pope, James O., Seidl, Andrew, Semper, Stefanie, Sergeev, Denis E., Skjelsvik, S., Søiland, Henrik, Smith, Doug M., Spall, Michael A., Spengler, Thomas, Touzeau, Alexandra, Weng, Y., Williams, Keith D., Yang, X., and Zhou, S.
- Subjects
13. Climate action ,14. Life underwater - Abstract
The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere–ocean research program investigating climate processes in the source region of the densest waters of the Atlantic meridional overturning circulation. During February and March 2018, a field campaign was executed over the Iceland and southern Greenland Seas that utilized a range of observing platforms to investigate critical processes in the region, including a research vessel, a research aircraft, moorings, sea gliders, floats, and a meteorological buoy. A remarkable feature of the field campaign was the highly coordinated deployment of the observing platforms, whereby the research vessel and aircraft tracks were planned in concert to allow simultaneous sampling of the atmosphere, the ocean, and their interactions. This joint planning was supported by tailor-made convection-permitting weather forecasts and novel diagnostics from an ensemble prediction system. The scientific aims of the IGP are to characterize the atmospheric forcing and the ocean response of coupled processes; in particular, cold-air outbreaks in the vicinity of the marginal ice zone and their triggering of oceanic heat loss, and the role of freshwater in the generation of dense water masses. The campaign observed the life cycle of a long-lasting cold-air outbreak over the Iceland Sea and the development of a cold-air outbreak over the Greenland Sea. Repeated profiling revealed the immediate impact on the ocean, while a comprehensive hydrographic survey provided a rare picture of these subpolar seas in winter. A joint atmosphere–ocean approach is also being used in the analysis phase, with coupled observational analysis and coordinated numerical modeling activities underway., Bulletin of the American Meteorological Society, 100 (9), ISSN:0003-0007, ISSN:1520-0477
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