Model evidence for a seasonal bias in Antarctic ice cores
Much of the global annual mean temperature change over Quaternary glacial cycles can be attributed to slow ice sheet and greenhouse gas feedbacks, but analysis of the short-term response to orbital forcings has the potential to reveal key relationships in the climate system. In particular, obliquity...
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:199243 2024-05-12T07:53:47+00:00 Model evidence for a seasonal bias in Antarctic ice cores Erb, Michael P. Jackson, Charles S. Broccoli, Anthony J. Lea, David W. Valdes, Paul J. Crucifix, Michel DiNezio, Pedro N. UCL - SST/ELI/ELIC - Earth & Climate 2018 http://hdl.handle.net/2078.1/199243 https://doi.org/10.1038/s41467-018-03800-0 eng eng Springer Nature boreal:199243 http://hdl.handle.net/2078.1/199243 doi:10.1038/s41467-018-03800-0 urn:EISSN:2041-1723 info:eu-repo/semantics/openAccess Nature Communications, Vol. 9, no.1, p. 1361 (2018) info:eu-repo/semantics/article 2018 ftunistlouisbrus https://doi.org/10.1038/s41467-018-03800-0 2024-04-18T17:31:28Z Much of the global annual mean temperature change over Quaternary glacial cycles can be attributed to slow ice sheet and greenhouse gas feedbacks, but analysis of the short-term response to orbital forcings has the potential to reveal key relationships in the climate system. In particular, obliquity and precession both produce highly seasonal temperature responses at high latitudes. Here, idealized single-forcing model experiments are used to quantify Earth’s response to obliquity, precession, CO2, and ice sheets, and a linear reconstruction methodology is used to compare these responses to long proxy records around the globe. This comparison reveals mismatches between the annual mean response to obliquity and precession in models versus the signals within Antarctic ice cores. Weighting the model-based reconstruction toward austral winter or spring reduces these discrepancies, providing evidence for a seasonal bias in ice cores. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet DIAL@USL-B (Université Saint-Louis, Bruxelles) Antarctic Austral Nature Communications 9 1 |
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Open Polar |
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DIAL@USL-B (Université Saint-Louis, Bruxelles) |
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ftunistlouisbrus |
language |
English |
description |
Much of the global annual mean temperature change over Quaternary glacial cycles can be attributed to slow ice sheet and greenhouse gas feedbacks, but analysis of the short-term response to orbital forcings has the potential to reveal key relationships in the climate system. In particular, obliquity and precession both produce highly seasonal temperature responses at high latitudes. Here, idealized single-forcing model experiments are used to quantify Earth’s response to obliquity, precession, CO2, and ice sheets, and a linear reconstruction methodology is used to compare these responses to long proxy records around the globe. This comparison reveals mismatches between the annual mean response to obliquity and precession in models versus the signals within Antarctic ice cores. Weighting the model-based reconstruction toward austral winter or spring reduces these discrepancies, providing evidence for a seasonal bias in ice cores. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Erb, Michael P. Jackson, Charles S. Broccoli, Anthony J. Lea, David W. Valdes, Paul J. Crucifix, Michel DiNezio, Pedro N. |
spellingShingle |
Erb, Michael P. Jackson, Charles S. Broccoli, Anthony J. Lea, David W. Valdes, Paul J. Crucifix, Michel DiNezio, Pedro N. Model evidence for a seasonal bias in Antarctic ice cores |
author_facet |
Erb, Michael P. Jackson, Charles S. Broccoli, Anthony J. Lea, David W. Valdes, Paul J. Crucifix, Michel DiNezio, Pedro N. |
author_sort |
Erb, Michael P. |
title |
Model evidence for a seasonal bias in Antarctic ice cores |
title_short |
Model evidence for a seasonal bias in Antarctic ice cores |
title_full |
Model evidence for a seasonal bias in Antarctic ice cores |
title_fullStr |
Model evidence for a seasonal bias in Antarctic ice cores |
title_full_unstemmed |
Model evidence for a seasonal bias in Antarctic ice cores |
title_sort |
model evidence for a seasonal bias in antarctic ice cores |
publisher |
Springer Nature |
publishDate |
2018 |
url |
http://hdl.handle.net/2078.1/199243 https://doi.org/10.1038/s41467-018-03800-0 |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Nature Communications, Vol. 9, no.1, p. 1361 (2018) |
op_relation |
boreal:199243 http://hdl.handle.net/2078.1/199243 doi:10.1038/s41467-018-03800-0 urn:EISSN:2041-1723 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-018-03800-0 |
container_title |
Nature Communications |
container_volume |
9 |
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1 |
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1798844590970634240 |