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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Springer Nature
2023
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Online Access: | https://boris.unibe.ch/177263/1/s41586-022-05411-8.pdf https://boris.unibe.ch/177263/8/Jones_Nature_accepted.pdf https://boris.unibe.ch/177263/ |
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ftunivbern:oai:boris.unibe.ch:177263 2023-08-20T04:01:05+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 application/pdf https://boris.unibe.ch/177263/1/s41586-022-05411-8.pdf https://boris.unibe.ch/177263/8/Jones_Nature_accepted.pdf https://boris.unibe.ch/177263/ eng eng Springer Nature https://boris.unibe.ch/177263/ info:eu-repo/semantics/openAccess 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). Seasonal temperatures in West Antarctica during the Holocene. Nature, 613(7943), pp. 292-297. Springer Nature 10.1038/s41586-022-05411-8 <http://dx.doi.org/10.1038/s41586-022-05411-8> 530 Physics 540 Chemistry 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2023 ftunivbern https://doi.org/10.1038/s41586-022-05411-8 2023-07-31T22:18:36Z 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 climate1. 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 duration2,3. 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 Antarctica4-7. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica BORIS (Bern Open Repository and Information System, University of Bern) Antarctic West Antarctic Ice Sheet West Antarctica Nature 613 7943 292 297 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics 540 Chemistry 550 Earth sciences & geology |
spellingShingle |
530 Physics 540 Chemistry 550 Earth sciences & geology 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. |
topic_facet |
530 Physics 540 Chemistry 550 Earth sciences & geology |
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 climate1. 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 duration2,3. 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 Antarctica4-7. |
format |
Article in Journal/Newspaper |
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 |
Springer Nature |
publishDate |
2023 |
url |
https://boris.unibe.ch/177263/1/s41586-022-05411-8.pdf https://boris.unibe.ch/177263/8/Jones_Nature_accepted.pdf https://boris.unibe.ch/177263/ |
geographic |
Antarctic West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Antarctic West Antarctic Ice Sheet West Antarctica |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica |
op_source |
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). Seasonal temperatures in West Antarctica during the Holocene. Nature, 613(7943), pp. 292-297. Springer Nature 10.1038/s41586-022-05411-8 <http://dx.doi.org/10.1038/s41586-022-05411-8> |
op_relation |
https://boris.unibe.ch/177263/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41586-022-05411-8 |
container_title |
Nature |
container_volume |
613 |
container_issue |
7943 |
container_start_page |
292 |
op_container_end_page |
297 |
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1774722559140429824 |