Past Antarctic summer temperature revealed by total air content in ice cores
Seasonal temperature reconstructions from ice cores are missing over glacial-interglacial timescales, preventing a good understanding of the driving factors of Antarctic past climate changes. Here the total air content (TAC) record from an Antarctic ice core is analyzed over the last 440 thousand of...
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ftunivlouvain:oai:dial.uclouvain.be:boreal:282188 2024-05-12T07:54:30+00:00 Past Antarctic summer temperature revealed by total air content in ice cores Raynaud, Dominique Yin, Qiuzhen Capron, Emilie Wu, Zhipeng Parrenin, Frederic Berger, André Lipenkov, Vladimir UCL - SST/ELI/ELIC - Earth & Climate 2023 http://hdl.handle.net/2078.1/282188 https://doi.org/10.5194/egusphere-2023-2360 eng eng info:eu-repo/grantAgreement/FNRS-FRS/PDR/FNRS T.0246.23 boreal:282188 http://hdl.handle.net/2078.1/282188 doi:10.5194/egusphere-2023-2360 info:eu-repo/semantics/openAccess Climate of the Past Discussions, (2023) info:eu-repo/semantics/article 2023 ftunivlouvain https://doi.org/10.5194/egusphere-2023-2360 2024-04-17T16:27:46Z Seasonal temperature reconstructions from ice cores are missing over glacial-interglacial timescales, preventing a good understanding of the driving factors of Antarctic past climate changes. Here the total air content (TAC) record from an Antarctic ice core is analyzed over the last 440 thousand of years (ka). While the water isotopic record, tracer for annual mean surface temperature, exhibits a dominant ~100 ka cyclicity, the TAC record is associated with a dominant ~40 ka cyclicity. Our results show that the TAC record is highly correlated with the mean insolation over the local astronomical half-year summer. It also shows for the first time that it is highly correlated with local summer temperature simulated with an Earth system model of intermediate complexity. This suggests that the Antarctic TAC records could be used as a proxy for local summer temperature changes. Also, our simulations show that local summer insolation is the primary driver of Antarctic summer surface temperature variations while changes in atmospheric greenhouse gas concentrations and northern hemisphere ice sheet configurations play a more important role on Antarctic annual surface temperature changes. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet DIAL@UCLouvain (Université catholique de Louvain) Antarctic The Antarctic Tac ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
description |
Seasonal temperature reconstructions from ice cores are missing over glacial-interglacial timescales, preventing a good understanding of the driving factors of Antarctic past climate changes. Here the total air content (TAC) record from an Antarctic ice core is analyzed over the last 440 thousand of years (ka). While the water isotopic record, tracer for annual mean surface temperature, exhibits a dominant ~100 ka cyclicity, the TAC record is associated with a dominant ~40 ka cyclicity. Our results show that the TAC record is highly correlated with the mean insolation over the local astronomical half-year summer. It also shows for the first time that it is highly correlated with local summer temperature simulated with an Earth system model of intermediate complexity. This suggests that the Antarctic TAC records could be used as a proxy for local summer temperature changes. Also, our simulations show that local summer insolation is the primary driver of Antarctic summer surface temperature variations while changes in atmospheric greenhouse gas concentrations and northern hemisphere ice sheet configurations play a more important role on Antarctic annual surface temperature changes. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Raynaud, Dominique Yin, Qiuzhen Capron, Emilie Wu, Zhipeng Parrenin, Frederic Berger, André Lipenkov, Vladimir |
spellingShingle |
Raynaud, Dominique Yin, Qiuzhen Capron, Emilie Wu, Zhipeng Parrenin, Frederic Berger, André Lipenkov, Vladimir Past Antarctic summer temperature revealed by total air content in ice cores |
author_facet |
Raynaud, Dominique Yin, Qiuzhen Capron, Emilie Wu, Zhipeng Parrenin, Frederic Berger, André Lipenkov, Vladimir |
author_sort |
Raynaud, Dominique |
title |
Past Antarctic summer temperature revealed by total air content in ice cores |
title_short |
Past Antarctic summer temperature revealed by total air content in ice cores |
title_full |
Past Antarctic summer temperature revealed by total air content in ice cores |
title_fullStr |
Past Antarctic summer temperature revealed by total air content in ice cores |
title_full_unstemmed |
Past Antarctic summer temperature revealed by total air content in ice cores |
title_sort |
past antarctic summer temperature revealed by total air content in ice cores |
publishDate |
2023 |
url |
http://hdl.handle.net/2078.1/282188 https://doi.org/10.5194/egusphere-2023-2360 |
long_lat |
ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
geographic |
Antarctic The Antarctic Tac |
geographic_facet |
Antarctic The Antarctic Tac |
genre |
Antarc* Antarctic ice core Ice Sheet |
genre_facet |
Antarc* Antarctic ice core Ice Sheet |
op_source |
Climate of the Past Discussions, (2023) |
op_relation |
info:eu-repo/grantAgreement/FNRS-FRS/PDR/FNRS T.0246.23 boreal:282188 http://hdl.handle.net/2078.1/282188 doi:10.5194/egusphere-2023-2360 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2360 |
_version_ |
1798849820900720640 |