Seasonal temperatures in West Antarctica during the Holocene
The recovery of long-term climate proxy records with seasonal resolution is rare because of natural smoothing processes, discontinuities and limitations in measurement resolution. Yet insolation forcing, a primary driver of multimillennial-scale climate change, acts through seasonal variations with...
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ftpubmed:oai:pubmedcentral.nih.gov:9834049 2023-05-15T13:40:01+02:00 Seasonal temperatures in West Antarctica during the Holocene Jones, Tyler R. Cuffey, Kurt M. Roberts, William H. G. Markle, Bradley R. Steig, Eric J. Stevens, C. Max Valdes, Paul J. Fudge, T. J. Sigl, Michael Hughes, Abigail G. Morris, Valerie Vaughn, Bruce H. Garland, Joshua Vinther, Bo M. Rozmiarek, Kevin S. Brashear, Chloe A. White, James W. C. 2023-01-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9834049/ http://www.ncbi.nlm.nih.gov/pubmed/36631651 https://doi.org/10.1038/s41586-022-05411-8 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9834049/ http://www.ncbi.nlm.nih.gov/pubmed/36631651 http://dx.doi.org/10.1038/s41586-022-05411-8 © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Nature Article Text 2023 ftpubmed https://doi.org/10.1038/s41586-022-05411-8 2023-01-15T02:06:21Z The recovery of long-term climate proxy records with seasonal resolution is rare because of natural smoothing processes, discontinuities and limitations in measurement resolution. Yet insolation forcing, a primary driver of multimillennial-scale climate change, acts through seasonal variations with direct impacts on seasonal climate(1). Whether the sensitivity of seasonal climate to insolation matches theoretical predictions has not been assessed over long timescales. Here, we analyse a continuous record of water-isotope ratios from the West Antarctic Ice Sheet Divide ice core to reveal summer and winter temperature changes through the last 11,000 years. Summer temperatures in West Antarctica increased through the early-to-mid-Holocene, reached a peak 4,100 years ago and then decreased to the present. Climate model simulations show that these variations primarily reflect changes in maximum summer insolation, confirming the general connection between seasonal insolation and warming and demonstrating the importance of insolation intensity rather than seasonally integrated insolation or season duration(2,3). Winter temperatures varied less overall, consistent with predictions from insolation forcing, but also fluctuated in the early Holocene, probably owing to changes in meridional heat transport. The magnitudes of summer and winter temperature changes constrain the lowering of the West Antarctic Ice Sheet surface since the early Holocene to less than 162 m and probably less than 58 m, consistent with geological constraints elsewhere in West Antarctica(4–7). Text Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica PubMed Central (PMC) Antarctic West Antarctic Ice Sheet West Antarctica Nature 613 7943 292 297 |
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Article Jones, Tyler R. Cuffey, Kurt M. Roberts, William H. G. Markle, Bradley R. Steig, Eric J. Stevens, C. Max Valdes, Paul J. Fudge, T. J. Sigl, Michael Hughes, Abigail G. Morris, Valerie Vaughn, Bruce H. Garland, Joshua Vinther, Bo M. Rozmiarek, Kevin S. Brashear, Chloe A. White, James W. C. Seasonal temperatures in West Antarctica during the Holocene |
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Article |
description |
The recovery of long-term climate proxy records with seasonal resolution is rare because of natural smoothing processes, discontinuities and limitations in measurement resolution. Yet insolation forcing, a primary driver of multimillennial-scale climate change, acts through seasonal variations with direct impacts on seasonal climate(1). Whether the sensitivity of seasonal climate to insolation matches theoretical predictions has not been assessed over long timescales. Here, we analyse a continuous record of water-isotope ratios from the West Antarctic Ice Sheet Divide ice core to reveal summer and winter temperature changes through the last 11,000 years. Summer temperatures in West Antarctica increased through the early-to-mid-Holocene, reached a peak 4,100 years ago and then decreased to the present. Climate model simulations show that these variations primarily reflect changes in maximum summer insolation, confirming the general connection between seasonal insolation and warming and demonstrating the importance of insolation intensity rather than seasonally integrated insolation or season duration(2,3). Winter temperatures varied less overall, consistent with predictions from insolation forcing, but also fluctuated in the early Holocene, probably owing to changes in meridional heat transport. The magnitudes of summer and winter temperature changes constrain the lowering of the West Antarctic Ice Sheet surface since the early Holocene to less than 162 m and probably less than 58 m, consistent with geological constraints elsewhere in West Antarctica(4–7). |
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author |
Jones, Tyler R. Cuffey, Kurt M. Roberts, William H. G. Markle, Bradley R. Steig, Eric J. Stevens, C. Max Valdes, Paul J. Fudge, T. J. Sigl, Michael Hughes, Abigail G. Morris, Valerie Vaughn, Bruce H. Garland, Joshua Vinther, Bo M. Rozmiarek, Kevin S. Brashear, Chloe A. White, James W. C. |
author_facet |
Jones, Tyler R. Cuffey, Kurt M. Roberts, William H. G. Markle, Bradley R. Steig, Eric J. Stevens, C. Max Valdes, Paul J. Fudge, T. J. Sigl, Michael Hughes, Abigail G. Morris, Valerie Vaughn, Bruce H. Garland, Joshua Vinther, Bo M. Rozmiarek, Kevin S. Brashear, Chloe A. White, James W. C. |
author_sort |
Jones, Tyler R. |
title |
Seasonal temperatures in West Antarctica during the Holocene |
title_short |
Seasonal temperatures in West Antarctica during the Holocene |
title_full |
Seasonal temperatures in West Antarctica during the Holocene |
title_fullStr |
Seasonal temperatures in West Antarctica during the Holocene |
title_full_unstemmed |
Seasonal temperatures in West Antarctica during the Holocene |
title_sort |
seasonal temperatures in west antarctica during the holocene |
publisher |
Nature Publishing Group UK |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9834049/ http://www.ncbi.nlm.nih.gov/pubmed/36631651 https://doi.org/10.1038/s41586-022-05411-8 |
geographic |
Antarctic West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Antarctic West Antarctic Ice Sheet West Antarctica |
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Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica |
op_source |
Nature |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9834049/ http://www.ncbi.nlm.nih.gov/pubmed/36631651 http://dx.doi.org/10.1038/s41586-022-05411-8 |
op_rights |
© The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
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CC-BY |
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https://doi.org/10.1038/s41586-022-05411-8 |
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Nature |
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