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Start Over Author "Haywood, Alan M" Publisher european geosciences union
9 results on '"Haywood, Alan M"'

1. Highly stratified mid-Pliocene Southern Ocean in PlioMIP2

Author

Sub Physical Oceanography, Marine and Atmospheric Research, Weiffenbach, Julia E., Dijkstra, Henk A., Heydt, Anna S. von der, Abe-Ouchi, Ayako, Chan, Wing-Le, Chandan, Deepak, Feng, Ran, Haywood, Alan M., Hunter, Stephen J., Li, Xiangyu, Otto-Bliesner, Bette L., Peltier, William Richard, Stepanek, Christian, Tan, Ning, Tindall, Julia C., Zhang, Zhongshi, Sub Physical Oceanography, Marine and Atmospheric Research, Weiffenbach, Julia E., Dijkstra, Henk A., Heydt, Anna S. von der, Abe-Ouchi, Ayako, Chan, Wing-Le, Chandan, Deepak, Feng, Ran, Haywood, Alan M., Hunter, Stephen J., Li, Xiangyu, Otto-Bliesner, Bette L., Peltier, William Richard, Stepanek, Christian, Tan, Ning, Tindall, Julia C., and Zhang, Zhongshi

Published
2024

2. Unraveling the mechanisms and implications of a stronger mid-Pliocene Atlantic Meridional Overturning Circulation (AMOC) in PlioMIP2

Author

Sub Physical Oceanography, Sub Dynamics Meteorology, Marine and Atmospheric Research, Weiffenbach, Julia E., Baatsen, Michiel L. J., Dijkstra, Henk A., Heydt, Anna S. von der, Abe-Ouchi, Ayako, Brady, Esther C., Chan, Wing-Le, Chandan, Deepak, Chandler, Mark A., Contoux, Camille, Feng, Ran, Guo, Chuncheng, Han, Zixuan, Haywood, Alan M., Li, Qiang, Li, Xiangyu, Lohmann, Gerrit, Lunt, Daniel J., Nisancioglu, Kerim H., Otto-Bliesner, Bette L., Peltier, W. Richard, Ramstein, Gilles, Sohl, Linda E., Stepanek, Christian, Tan, Ning, Tindall, Julia C., Williams, Charles J. R., Zhang, Qiong, Zhang, Zhongshi, Sub Physical Oceanography, Sub Dynamics Meteorology, Marine and Atmospheric Research, Weiffenbach, Julia E., Baatsen, Michiel L. J., Dijkstra, Henk A., Heydt, Anna S. von der, Abe-Ouchi, Ayako, Brady, Esther C., Chan, Wing-Le, Chandan, Deepak, Chandler, Mark A., Contoux, Camille, Feng, Ran, Guo, Chuncheng, Han, Zixuan, Haywood, Alan M., Li, Qiang, Li, Xiangyu, Lohmann, Gerrit, Lunt, Daniel J., Nisancioglu, Kerim H., Otto-Bliesner, Bette L., Peltier, W. Richard, Ramstein, Gilles, Sohl, Linda E., Stepanek, Christian, Tan, Ning, Tindall, Julia C., Williams, Charles J. R., Zhang, Qiong, and Zhang, Zhongshi

Published
2023

3. The hydrological cycle and ocean circulation of the Maritime Continent in the Pliocene: results from PlioMIP2

Author

Sub Physical Oceanography, Sub Dynamics Meteorology, Marine and Atmospheric Research, Ren, Xin, Lunt, Daniel J., Hendy, Erica, Von Der Heydt, Anna, Abe-Ouchi, Ayako, Otto-Bliesner, Bette, Williams, Charles J.R., Stepanek, Christian, Guo, Chuncheng, Chandan, Deepak, Lohmann, Gerrit, Tindall, Julia C., Sohl, Linda E., Chandler, Mark A., Kageyama, Masa, Baatsen, Michiel L.J., Tan, Ning, Zhang, Qiong, Feng, Ran, Hunter, Stephen, Chan, Wing Le, Peltier, W. Richard, Li, Xiangyu, Kamae, Youichi, Zhang, Zhongshi, Haywood, Alan M., Sub Physical Oceanography, Sub Dynamics Meteorology, Marine and Atmospheric Research, Ren, Xin, Lunt, Daniel J., Hendy, Erica, Von Der Heydt, Anna, Abe-Ouchi, Ayako, Otto-Bliesner, Bette, Williams, Charles J.R., Stepanek, Christian, Guo, Chuncheng, Chandan, Deepak, Lohmann, Gerrit, Tindall, Julia C., Sohl, Linda E., Chandler, Mark A., Kageyama, Masa, Baatsen, Michiel L.J., Tan, Ning, Zhang, Qiong, Feng, Ran, Hunter, Stephen, Chan, Wing Le, Peltier, W. Richard, Li, Xiangyu, Kamae, Youichi, Zhang, Zhongshi, and Haywood, Alan M.

Published
2023

4. Mid-Pliocene West African Monsoon rainfall as simulated in the PlioMIP2 ensemble

Author

Sub Dynamics Meteorology, Sub Physical Oceanography, Marine and Atmospheric Research, Berntell, Ellen, Zhang, Qiong, Li, Qiang, Haywood, Alan M., Tindall, Julia C., Hunter, Stephen J., Zhang, Zhongshi, Li, Xiangyu, Guo, Chuncheng, Nisancioglu, Kerim H., Stepanek, Christian, Lohmann, Gerrit, Sohl, Linda E., Chandler, Mark A., Tan, Ning, Contoux, Camille, Ramstein, Gilles, Baatsen, Michiel L.J., Von Der Heydt, Anna S., Chandan, Deepak, Peltier, William Richard, Abe-Ouchi, Ayako, Chan, Wing Le, Kamae, Youichi, Williams, Charles J.R., Lunt, Daniel J., Feng, Ran, Otto-Bliesner, Bette L., Brady, Esther C., Sub Dynamics Meteorology, Sub Physical Oceanography, Marine and Atmospheric Research, Berntell, Ellen, Zhang, Qiong, Li, Qiang, Haywood, Alan M., Tindall, Julia C., Hunter, Stephen J., Zhang, Zhongshi, Li, Xiangyu, Guo, Chuncheng, Nisancioglu, Kerim H., Stepanek, Christian, Lohmann, Gerrit, Sohl, Linda E., Chandler, Mark A., Tan, Ning, Contoux, Camille, Ramstein, Gilles, Baatsen, Michiel L.J., Von Der Heydt, Anna S., Chandan, Deepak, Peltier, William Richard, Abe-Ouchi, Ayako, Chan, Wing Le, Kamae, Youichi, Williams, Charles J.R., Lunt, Daniel J., Feng, Ran, Otto-Bliesner, Bette L., and Brady, Esther C.

Published
2021

5. Evaluating the large-scale hydrological cycle response within the Pliocene Model Intercomparison Project Phase 2 (PlioMIP2) ensemble

Author

Sub Dynamics Meteorology, Sub Physical Oceanography, Marine and Atmospheric Research, Han, Zixuan, Zhang, Qiong, Li, Qiang, Feng, Ran, Haywood, Alan M., Tindall, Julia C., Hunter, Stephen J., Otto-Bliesner, Bette L., Brady, Esther C., Rosenbloom, Nan, Zhang, Zhongshi, Li, Xiangyu, Guo, Chuncheng, Nisancioglu, Kerim H., Stepanek, Christian, Lohmann, Gerrit, Sohl, Linda E., Chandler, Mark A., Tan, Ning, Ramstein, Gilles, Baatsen, Michiel L.J., Von Der Heydt, Anna S., Chandan, Deepak, Peltier, W. Richard, Williams, Charles J.R., Lunt, Daniel J., Cheng, Jianbo, Wen, Qin, Burls, Natalie J., Sub Dynamics Meteorology, Sub Physical Oceanography, Marine and Atmospheric Research, Han, Zixuan, Zhang, Qiong, Li, Qiang, Feng, Ran, Haywood, Alan M., Tindall, Julia C., Hunter, Stephen J., Otto-Bliesner, Bette L., Brady, Esther C., Rosenbloom, Nan, Zhang, Zhongshi, Li, Xiangyu, Guo, Chuncheng, Nisancioglu, Kerim H., Stepanek, Christian, Lohmann, Gerrit, Sohl, Linda E., Chandler, Mark A., Tan, Ning, Ramstein, Gilles, Baatsen, Michiel L.J., Von Der Heydt, Anna S., Chandan, Deepak, Peltier, W. Richard, Williams, Charles J.R., Lunt, Daniel J., Cheng, Jianbo, Wen, Qin, and Burls, Natalie J.

Published
2021

6. Lessons from a high-CO2 world: an ocean view from ∼ 3 million years ago

Author

McClymont, Erin L., Ford, Heather L., Ho, Sze Ling, Tindall, Julia C., Haywood, Alan M., Alonso-Garcia, Montserrat, Bailey, Ian, Berke, Melissa A., Littler, Kate, Patterson, Molly O., Petrick, Benjamin, Peterse, Francien, Ravelo, A. Christina, De Schepper, Stijn, Swann, George E. A., Thirumalai, Kaustubh, Tierney, Jessica E., van der Weijst, Carolien, White, Sarah, Abe-Ouchi, Ayako, Baatsen, Michiel L. J., Brady, Esther C., Chan, Wing-Le, Chandan, Deepak, Feng, Ran, Guo, Chuncheng, von der Heydt, Anna S., Hunter, Stephen, Li, Xiangyi, Lohmann, Gerrit, Nisancioglu, Kerim H., Otto-Bliesner, Bette L., Peltier, W. Richard, Stepanek, Christian, and Zhang, Zhongshi

Subjects
Global and Planetary Change, Stratigraphy, Palaeontology
Abstract

A range of future climate scenarios are projected for high atmospheric CO2 concentrations, given uncertainties over future human actions as well as potential environmental and climatic feedbacks. The geological record offers an opportunity to understand climate system response to a range of forcings and feedbacks which operate over multiple temporal and spatial scales. Here, we examine a single interglacial during the late Pliocene (KM5c, ca. 3.205±0.01 Ma) when atmospheric CO2 exceeded pre-industrial concentrations, but were similar to today and to the lowest emission scenarios for this century. As orbital forcing and continental configurations were almost identical to today, we are able to focus on equilibrium climate system response to modern and near-future CO2. Using proxy data from 32 sites, we demonstrate that global mean sea-surface temperatures were warmer than pre-industrial values, by ∼2.3 ∘C for the combined proxy data (foraminifera Mg∕Ca and alkenones), or by ∼3.2–3.4 ∘C (alkenones only). Compared to the pre-industrial period, reduced meridional gradients and enhanced warming in the North Atlantic are consistently reconstructed. There is broad agreement between data and models at the global scale, with regional differences reflecting ocean circulation and/or proxy signals. An uneven distribution of proxy data in time and space does, however, add uncertainty to our anomaly calculations. The reconstructed global mean sea-surface temperature anomaly for KM5c is warmer than all but three of the PlioMIP2 model outputs, and the reconstructed North Atlantic data tend to align with the warmest KM5c model values. Our results demonstrate that even under low-CO2 emission scenarios, surface ocean warming may be expected to exceed model projections and will be accentuated in the higher latitudes.

Published
2020

7. Lessons from a high-CO2 world: An ocean view from ∼3 million years ago

Author

Marine and Atmospheric Research, Organic geochemistry, Marine palynology and palaeoceanography, Sub Dynamics Meteorology, Sub Physical Oceanography, Marine Palynology, McClymont, Erin L., Ford, Heather L., Ling Ho, Sze, Tindall, Julia C., Haywood, Alan M., Alonso-Garcia, Montserrat, Bailey, Ian, Berke, Melissa A., Littler, Kate, Patterson, Molly O., Petrick, Benjamin, Peterse, Francien, Christina Ravelo, A., Risebrobakken, Bjorg, De Schepper, Stijn, Swann, George E.A., Thirumalai, Kaustubh, Tierney, Jessica E., van der Weijst, Carolien, White, Sarah, Abe-Ouchi, Ayako, Baatsen, Michiel L.J., Brady, Esther C., Chan, Wing Le, Chandan, Deepak, Feng, Ran, Guo, Chuncheng, Von Der Heydt, Anna S., Hunter, Stephen, Li, Xiangyi, Lohmann, Gerrit, Nisancioglu, Kerim H., Otto-Bliesner, Bette L., Richard Peltier, W., Stepanek, Christian, Zhang, Zhongshi, Marine and Atmospheric Research, Organic geochemistry, Marine palynology and palaeoceanography, Sub Dynamics Meteorology, Sub Physical Oceanography, Marine Palynology, McClymont, Erin L., Ford, Heather L., Ling Ho, Sze, Tindall, Julia C., Haywood, Alan M., Alonso-Garcia, Montserrat, Bailey, Ian, Berke, Melissa A., Littler, Kate, Patterson, Molly O., Petrick, Benjamin, Peterse, Francien, Christina Ravelo, A., Risebrobakken, Bjorg, De Schepper, Stijn, Swann, George E.A., Thirumalai, Kaustubh, Tierney, Jessica E., van der Weijst, Carolien, White, Sarah, Abe-Ouchi, Ayako, Baatsen, Michiel L.J., Brady, Esther C., Chan, Wing Le, Chandan, Deepak, Feng, Ran, Guo, Chuncheng, Von Der Heydt, Anna S., Hunter, Stephen, Li, Xiangyi, Lohmann, Gerrit, Nisancioglu, Kerim H., Otto-Bliesner, Bette L., Richard Peltier, W., Stepanek, Christian, and Zhang, Zhongshi

Published
2020

8. The PMIP4 contribution to CMIP6 – Part 1: Overview and over-arching analysis plan

Author

Global Environment Facility, Centre National de la Recherche Scientifique (France), Australian Research Council, European Research Council, Engineering and Physical Sciences Research Council (UK), Natural Environment Research Council (UK), Comisión Nacional de Investigación Científica y Tecnológica (Chile), Harrison, Sandy P. [0000-0001-5687-1903], Peterschmitt, Jean-Yves [0000-0003-3486-3157], Abe-Ouchi, Ayako [0000-0003-1745-5952], Brierley, Chris [0000-0002-9195-6731], Crucifix, Michel [0000-0002-3437-4911], Dolan, Aisling [0000-0002-9585-9648], Fischer, Hubertus [0000-0002-2787-4221], Hopcroft, Peter O. [0000-0003-3694-9181], Ivanovic, Ruza F. [0000-0002-7805-6018], Lambert, Fabrice [0000-0002-2192-024X], Lunt, Daniel J. [0000-0003-3585-6928], Peltier, W. Richard [0000-0002-5555-7661], Phipps, Steven J. [0000-0001-5657-8782], Roche, Didier M. [0000-0001-6272-9428], Schmidt, Gavin A. [0000-0002-2258-0486], Zhang, Qiong [0000-0002-9137-2883], Kageyama, Masa, Braconnot, Pascale, Harrison, Sandy P., Haywood, Alan M., Jungclaus, J. H., Otto-Bliesner, Bette L., Peterschmitt, Jean-Yves, Abe-Ouchi, Ayako, Albani, Samuel, Bartlein, Patrick J., Brierley, Chris, Crucifix, Michel, Dolan, Aisling, Fernández-Donado, Laura, Fischer, Hubertus, Hopcroft, Peter O., Ivanovic, Ruza F., Lambert, Fabrice, Lunt, Daniel J., Mahowald, Natalie M., Peltier, W. Richard, Phipps, Steven J., Roche, Didier M., Schmidt, Gavin A., Tarasov, Lev, Valdes, Paul J., Zhang, Qiong, Zhou, Tianjun, Global Environment Facility, Centre National de la Recherche Scientifique (France), Australian Research Council, European Research Council, Engineering and Physical Sciences Research Council (UK), Natural Environment Research Council (UK), Comisión Nacional de Investigación Científica y Tecnológica (Chile), Harrison, Sandy P. [0000-0001-5687-1903], Peterschmitt, Jean-Yves [0000-0003-3486-3157], Abe-Ouchi, Ayako [0000-0003-1745-5952], Brierley, Chris [0000-0002-9195-6731], Crucifix, Michel [0000-0002-3437-4911], Dolan, Aisling [0000-0002-9585-9648], Fischer, Hubertus [0000-0002-2787-4221], Hopcroft, Peter O. [0000-0003-3694-9181], Ivanovic, Ruza F. [0000-0002-7805-6018], Lambert, Fabrice [0000-0002-2192-024X], Lunt, Daniel J. [0000-0003-3585-6928], Peltier, W. Richard [0000-0002-5555-7661], Phipps, Steven J. [0000-0001-5657-8782], Roche, Didier M. [0000-0001-6272-9428], Schmidt, Gavin A. [0000-0002-2258-0486], Zhang, Qiong [0000-0002-9137-2883], Kageyama, Masa, Braconnot, Pascale, Harrison, Sandy P., Haywood, Alan M., Jungclaus, J. H., Otto-Bliesner, Bette L., Peterschmitt, Jean-Yves, Abe-Ouchi, Ayako, Albani, Samuel, Bartlein, Patrick J., Brierley, Chris, Crucifix, Michel, Dolan, Aisling, Fernández-Donado, Laura, Fischer, Hubertus, Hopcroft, Peter O., Ivanovic, Ruza F., Lambert, Fabrice, Lunt, Daniel J., Mahowald, Natalie M., Peltier, W. Richard, Phipps, Steven J., Roche, Didier M., Schmidt, Gavin A., Tarasov, Lev, Valdes, Paul J., Zhang, Qiong, and Zhou, Tianjun

Abstract

This paper is the first of a series of four GMD papers on the PMIP4-CMIP6 experiments. Part 2 (OttoBliesner et al., 2017) gives details about the two PMIP4- CMIP6 interglacial experiments, Part 3 (Jungclaus et al., 2017) about the last millennium experiment, and Part 4 (Kageyama et al., 2017) about the Last Glacial Maximum experiment. The mid-Pliocene Warm Period experiment is part of the Pliocene Model Intercomparison Project (PlioMIP) – Phase 2, detailed in Haywood et al. (2016). The goal of the Paleoclimate Modelling Intercomparison Project (PMIP) is to understand the response of the climate system to different climate forcings for documented climatic states very different from the present and historical climates. Through comparison with observations of the environmental impact of these climate changes, or with climate reconstructions based on physical, chemical, or biological records, PMIP also addresses the issue of how well state-of-the-art numerical models simulate climate change. Climate models are usually developed using the present and historical climates as references, but climate projections show that future climates will lie well outside these conditions. Palaeoclimates very different from these reference states therefore provide stringent tests for state-of-the-art models and a way to assess whether their sensitivity to forcings is compatible with palaeoclimatic evidence. Simulations of five different periods have been designed to address the objectives of the sixth phase of the Coupled Model Intercomparison Project (CMIP6): the millennium prior to the industrial epoch (CMIP6 name: past1000); the mid-Holocene, 6000 years ago (midHolocene); the Last Glacial Maximum, 21 000 years ago (lgm); the Last Interglacial, 127 000 years ago (lig127k); and the mid-Pliocene Warm Period, 3.2 million years ago (midPliocene-eoi400). These climatic periods are well documented by palaeoclimatic and palaeoenvironmental records, with climate and environmental changes relev

Published
2018

9. Mid-Pliocene East Asian monsoon climate simulated in the PlioMIP

Author

Zhang, Ran, Yan, Qing, Zhang, Zhongshi S., Jiang, Dabang, Otto-Bliesner, Bette L., Haywood, Alan M., Hill, Daniel J., Dolan, Aisling M., Stepanek, Christian, Lohmann, Gerrit, Contoux, Camille, Bragg, Fran J., Chan, Wing-Le, Chandler, Mark A., Jost, Anne, Kamae, Youichi, Abe-Ouchi, Ayako, Ramstein, Gilles, Rosenbloom, Nan A., Sohl, Linda, Ueda, Hiroaki, Zhang, Ran, Yan, Qing, Zhang, Zhongshi S., Jiang, Dabang, Otto-Bliesner, Bette L., Haywood, Alan M., Hill, Daniel J., Dolan, Aisling M., Stepanek, Christian, Lohmann, Gerrit, Contoux, Camille, Bragg, Fran J., Chan, Wing-Le, Chandler, Mark A., Jost, Anne, Kamae, Youichi, Abe-Ouchi, Ayako, Ramstein, Gilles, Rosenbloom, Nan A., Sohl, Linda, and Ueda, Hiroaki

Abstract

Based on the simulations with fifteen climate models in the Pliocene Model Intercomparison Project (PlioMIP), the regional climate of East Asia (focusing on China) during the mid-Pliocene is investigated in this study. Compared to the pre-industrial, the multi-model ensemble mean (MMM) of all models shows the East Asian summer wind (EASW) largely strengthens in monsoon China, and the East Asian winter wind (EAWW) strengthens in south monsoon China but slightly weakens in north monsoon China in mid-Pliocene. The MMM of all models also illustrates a warmer and wetter mid-Pliocene climate in China. The simulated weakened mid-Pliocene EAWW in north monsoon China and intensified EASW in monsoon China agree well with geological reconstructions. However, the model-model discrepancy in simulating mid-Pliocene East Asian monsoon climate, in particular EAWW, should be further addressed in the future work of PlioMIP.

Published
2013

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