The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature
The ocean's immense ability to store and release heat on centennial to millennial time scales modulates the impacts of climate perturbations. To gain a better understanding of past variations in mean ocean temperature (MOT), a noble gas-based proxy measured from ancient air in ice cores has bee...
Published in: | Geophysical Research Letters |
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Language: | English |
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2023
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5017504 2023-06-11T04:12:41+02:00 The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature Pöppelmeier, F. Baggenstos, D. Grimmer, M. Liu, Z. Schmitt, J. Fischer, H. Stocker, T. 2023 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504_1/component/file_5017675/5017504.pdf eng eng info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL102055 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504_1/component/file_5017675/5017504.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/4.0/ Geophysical Research Letters info:eu-repo/semantics/article 2023 ftgfzpotsdam https://doi.org/10.1029/2022GL102055 2023-05-28T23:39:14Z The ocean's immense ability to store and release heat on centennial to millennial time scales modulates the impacts of climate perturbations. To gain a better understanding of past variations in mean ocean temperature (MOT), a noble gas-based proxy measured from ancient air in ice cores has been developed. Here we assess non-temperature effects that may influence the atmospheric noble gas ratios reconstructed from polar ice and how they impact the temperature signal with an intermediate complexity Earth system model. We find that changes in wind speed, sea-ice extent, and ocean circulation have partially compensating effects on mean-ocean noble gas saturation, leading to a slight reduction of noble gas undersaturation at the Last Glacial Maximum (LGM). Taking these effects and ice core measurements into account, our model suggests a revised MOT difference between the LGM and pre-industrial of −2.1 ± 0.7°C that is also in improved agreement with other independent temperature reconstructions. Article in Journal/Newspaper ice core Sea ice GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Geophysical Research Letters 50 6 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
The ocean's immense ability to store and release heat on centennial to millennial time scales modulates the impacts of climate perturbations. To gain a better understanding of past variations in mean ocean temperature (MOT), a noble gas-based proxy measured from ancient air in ice cores has been developed. Here we assess non-temperature effects that may influence the atmospheric noble gas ratios reconstructed from polar ice and how they impact the temperature signal with an intermediate complexity Earth system model. We find that changes in wind speed, sea-ice extent, and ocean circulation have partially compensating effects on mean-ocean noble gas saturation, leading to a slight reduction of noble gas undersaturation at the Last Glacial Maximum (LGM). Taking these effects and ice core measurements into account, our model suggests a revised MOT difference between the LGM and pre-industrial of −2.1 ± 0.7°C that is also in improved agreement with other independent temperature reconstructions. |
format |
Article in Journal/Newspaper |
author |
Pöppelmeier, F. Baggenstos, D. Grimmer, M. Liu, Z. Schmitt, J. Fischer, H. Stocker, T. |
spellingShingle |
Pöppelmeier, F. Baggenstos, D. Grimmer, M. Liu, Z. Schmitt, J. Fischer, H. Stocker, T. The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature |
author_facet |
Pöppelmeier, F. Baggenstos, D. Grimmer, M. Liu, Z. Schmitt, J. Fischer, H. Stocker, T. |
author_sort |
Pöppelmeier, F. |
title |
The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature |
title_short |
The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature |
title_full |
The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature |
title_fullStr |
The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature |
title_full_unstemmed |
The Effect of Past Saturation Changes on Noble Gas Reconstructions of Mean Ocean Temperature |
title_sort |
effect of past saturation changes on noble gas reconstructions of mean ocean temperature |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504_1/component/file_5017675/5017504.pdf |
genre |
ice core Sea ice |
genre_facet |
ice core Sea ice |
op_source |
Geophysical Research Letters |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL102055 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017504_1/component/file_5017675/5017504.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1029/2022GL102055 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
6 |
_version_ |
1768388712463335424 |