Antarctic surface temperature and elevation during the Last Glacial Maximum
Water-stable isotopes in polar ice cores are a widely used temperature proxy in paleoclimate reconstruction, yet calibration remains challenging in East Antarctica. Here, we reconstruct the magnitude and spatial pattern of Last Glacial Maximum surface cooling in Antarctica using borehole thermometry...
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American Association for the Advancement of Science (AAAS)
2022
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Online Access: | https://doi.org/10.1126/science.abd2897 http://infoscience.epfl.ch/record/298276 |
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ftinfoscience:oai:infoscience.epfl.ch:298276 2023-05-15T13:43:17+02:00 Antarctic surface temperature and elevation during the Last Glacial Maximum Buizert, C. Fudge, T.J. Roberts, W.H.G. Steig, E.J. Sherriff-Tadano, S. Ritz, C. Lefebvre, E. Edwards, J. Kawamura, K. Oyabu, I. Motoyama, H. Kahle, E.C. Jones, T.R. Abe-Ouchi, A. Obase, T. Martin, C. Corr, H. Severinghaus, J.P. Beaudette, R. Epifanio, J.A. Brook, E.J. Martin, K. Chappellaz, J. Aoki, S. Nakazawa, T. Sowers, T.A. Alley, R.B. Ahn, J. Sigl, M. Severi, M. Dunbar, N.W. Svensson, A. Fegyveresi, J.M. He, C. Liu, Z. Zhu, J. Otto-Bliesner, B.L. Lipenkov, V.Y. Kageyama, M. Schwander, J. 2022-11-23T16:11:05Z https://doi.org/10.1126/science.abd2897 http://infoscience.epfl.ch/record/298276 unknown American Association for the Advancement of Science (AAAS) doi:10.1126/science.abd2897 http://infoscience.epfl.ch/record/298276 http://infoscience.epfl.ch/record/298276 Text 2022 ftinfoscience https://doi.org/10.1126/science.abd2897 2023-02-13T23:12:29Z Water-stable isotopes in polar ice cores are a widely used temperature proxy in paleoclimate reconstruction, yet calibration remains challenging in East Antarctica. Here, we reconstruct the magnitude and spatial pattern of Last Glacial Maximum surface cooling in Antarctica using borehole thermometry and firn properties in seven ice cores. West Antarctic sites cooled ~10°C relative to the preindustrial period. East Antarctic sites show a range from ~4° to ~7°C cooling, which is consistent with the results of global climate models when the effects of topographic changes indicated with ice core air-content data are included, but less than those indicated with the use of water-stable isotopes calibrated against modern spatial gradients. An altered Antarctic temperature inversion during the glacial reconciles our estimates with water-isotope observations. © 2021 American Association for the Advancement of Science. All rights reserved. Text Antarc* Antarctic Antarctica East Antarctica ice core EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Antarctic East Antarctica Science 372 6546 1097 1101 |
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EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
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ftinfoscience |
language |
unknown |
description |
Water-stable isotopes in polar ice cores are a widely used temperature proxy in paleoclimate reconstruction, yet calibration remains challenging in East Antarctica. Here, we reconstruct the magnitude and spatial pattern of Last Glacial Maximum surface cooling in Antarctica using borehole thermometry and firn properties in seven ice cores. West Antarctic sites cooled ~10°C relative to the preindustrial period. East Antarctic sites show a range from ~4° to ~7°C cooling, which is consistent with the results of global climate models when the effects of topographic changes indicated with ice core air-content data are included, but less than those indicated with the use of water-stable isotopes calibrated against modern spatial gradients. An altered Antarctic temperature inversion during the glacial reconciles our estimates with water-isotope observations. © 2021 American Association for the Advancement of Science. All rights reserved. |
format |
Text |
author |
Buizert, C. Fudge, T.J. Roberts, W.H.G. Steig, E.J. Sherriff-Tadano, S. Ritz, C. Lefebvre, E. Edwards, J. Kawamura, K. Oyabu, I. Motoyama, H. Kahle, E.C. Jones, T.R. Abe-Ouchi, A. Obase, T. Martin, C. Corr, H. Severinghaus, J.P. Beaudette, R. Epifanio, J.A. Brook, E.J. Martin, K. Chappellaz, J. Aoki, S. Nakazawa, T. Sowers, T.A. Alley, R.B. Ahn, J. Sigl, M. Severi, M. Dunbar, N.W. Svensson, A. Fegyveresi, J.M. He, C. Liu, Z. Zhu, J. Otto-Bliesner, B.L. Lipenkov, V.Y. Kageyama, M. Schwander, J. |
spellingShingle |
Buizert, C. Fudge, T.J. Roberts, W.H.G. Steig, E.J. Sherriff-Tadano, S. Ritz, C. Lefebvre, E. Edwards, J. Kawamura, K. Oyabu, I. Motoyama, H. Kahle, E.C. Jones, T.R. Abe-Ouchi, A. Obase, T. Martin, C. Corr, H. Severinghaus, J.P. Beaudette, R. Epifanio, J.A. Brook, E.J. Martin, K. Chappellaz, J. Aoki, S. Nakazawa, T. Sowers, T.A. Alley, R.B. Ahn, J. Sigl, M. Severi, M. Dunbar, N.W. Svensson, A. Fegyveresi, J.M. He, C. Liu, Z. Zhu, J. Otto-Bliesner, B.L. Lipenkov, V.Y. Kageyama, M. Schwander, J. Antarctic surface temperature and elevation during the Last Glacial Maximum |
author_facet |
Buizert, C. Fudge, T.J. Roberts, W.H.G. Steig, E.J. Sherriff-Tadano, S. Ritz, C. Lefebvre, E. Edwards, J. Kawamura, K. Oyabu, I. Motoyama, H. Kahle, E.C. Jones, T.R. Abe-Ouchi, A. Obase, T. Martin, C. Corr, H. Severinghaus, J.P. Beaudette, R. Epifanio, J.A. Brook, E.J. Martin, K. Chappellaz, J. Aoki, S. Nakazawa, T. Sowers, T.A. Alley, R.B. Ahn, J. Sigl, M. Severi, M. Dunbar, N.W. Svensson, A. Fegyveresi, J.M. He, C. Liu, Z. Zhu, J. Otto-Bliesner, B.L. Lipenkov, V.Y. Kageyama, M. Schwander, J. |
author_sort |
Buizert, C. |
title |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
title_short |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
title_full |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
title_fullStr |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
title_full_unstemmed |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
title_sort |
antarctic surface temperature and elevation during the last glacial maximum |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2022 |
url |
https://doi.org/10.1126/science.abd2897 http://infoscience.epfl.ch/record/298276 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core |
op_source |
http://infoscience.epfl.ch/record/298276 |
op_relation |
doi:10.1126/science.abd2897 http://infoscience.epfl.ch/record/298276 |
op_doi |
https://doi.org/10.1126/science.abd2897 |
container_title |
Science |
container_volume |
372 |
container_issue |
6546 |
container_start_page |
1097 |
op_container_end_page |
1101 |
_version_ |
1766186763431182336 |