Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated?
Noble gases in ice cores enable reconstructions of past mean ocean temperature. A recent result from the clathrate‐containing WAIS Divide Ice Core showed tight covariation between ocean and Antarctic temperatures throughout the last deglaciation, except for the Younger Dryas interval. In the beginni...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2019
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/39343/ https://doi.org/10.1029/2019GL082971 https://nrl.northumbria.ac.uk/id/eprint/39343/16/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/8/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/1/Shackleton%20et%20al%20-%20Is%20the%20noble%20gas-based%20rate%20of%20ocean%20warming%20during%20the%20Younger%20Dryas%20overestimated%20AAM.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:39343 2023-05-15T13:41:26+02:00 Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? Shackleton, S. Bereiter, B. Baggenstos, Daniel Bauska, Thomas Brook, Edward J. Marcott, Shaun A. Severinghaus, Jeffrey P. 2019-06-16 text https://nrl.northumbria.ac.uk/id/eprint/39343/ https://doi.org/10.1029/2019GL082971 https://nrl.northumbria.ac.uk/id/eprint/39343/16/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/8/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/1/Shackleton%20et%20al%20-%20Is%20the%20noble%20gas-based%20rate%20of%20ocean%20warming%20during%20the%20Younger%20Dryas%20overestimated%20AAM.pdf en eng American Geophysical Union https://nrl.northumbria.ac.uk/id/eprint/39343/16/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/8/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/1/Shackleton%20et%20al%20-%20Is%20the%20noble%20gas-based%20rate%20of%20ocean%20warming%20during%20the%20Younger%20Dryas%20overestimated%20AAM.pdf Shackleton, S., Bereiter, B., Baggenstos, Daniel, Bauska, Thomas, Brook, Edward J., Marcott, Shaun A. and Severinghaus, Jeffrey P. (2019) Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? Geophysical Research Letters, 46 (11). pp. 5928-5936. ISSN 0094-8276 F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2019 ftunivnorthumb https://doi.org/10.1029/2019GL082971 2022-09-25T06:09:56Z Noble gases in ice cores enable reconstructions of past mean ocean temperature. A recent result from the clathrate‐containing WAIS Divide Ice Core showed tight covariation between ocean and Antarctic temperatures throughout the last deglaciation, except for the Younger Dryas interval. In the beginning of this interval oceans warmed at 2.5°C/kyr ‐ three times greater than estimates of modern warming. If valid, this challenges our understanding of the mechanisms controlling ocean heat uptake. Here we reconstruct mean ocean temperature with clathrate‐free ice samples from Taylor Glacier to test these findings. The two records agree in net temperature change over the Younger Dryas, but the Taylor Glacier record suggests sustained warming at the more modest rate of 1.1±0.2°C/kyr. We explore mechanisms to explain differences between records and suggest that the noble gas content for the Younger Dryas interval of WAIS Divide may have been altered by a decimeter‐scale fractionation during bubble‐clathrate transformation. Article in Journal/Newspaper Antarc* Antarctic ice core Taylor Glacier Northumbria University, Newcastle: Northumbria Research Link (NRL) Antarctic Taylor Glacier ENVELOPE(162.167,162.167,-77.733,-77.733) Geophysical Research Letters 46 11 5928 5936 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Shackleton, S. Bereiter, B. Baggenstos, Daniel Bauska, Thomas Brook, Edward J. Marcott, Shaun A. Severinghaus, Jeffrey P. Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Noble gases in ice cores enable reconstructions of past mean ocean temperature. A recent result from the clathrate‐containing WAIS Divide Ice Core showed tight covariation between ocean and Antarctic temperatures throughout the last deglaciation, except for the Younger Dryas interval. In the beginning of this interval oceans warmed at 2.5°C/kyr ‐ three times greater than estimates of modern warming. If valid, this challenges our understanding of the mechanisms controlling ocean heat uptake. Here we reconstruct mean ocean temperature with clathrate‐free ice samples from Taylor Glacier to test these findings. The two records agree in net temperature change over the Younger Dryas, but the Taylor Glacier record suggests sustained warming at the more modest rate of 1.1±0.2°C/kyr. We explore mechanisms to explain differences between records and suggest that the noble gas content for the Younger Dryas interval of WAIS Divide may have been altered by a decimeter‐scale fractionation during bubble‐clathrate transformation. |
format |
Article in Journal/Newspaper |
author |
Shackleton, S. Bereiter, B. Baggenstos, Daniel Bauska, Thomas Brook, Edward J. Marcott, Shaun A. Severinghaus, Jeffrey P. |
author_facet |
Shackleton, S. Bereiter, B. Baggenstos, Daniel Bauska, Thomas Brook, Edward J. Marcott, Shaun A. Severinghaus, Jeffrey P. |
author_sort |
Shackleton, S. |
title |
Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? |
title_short |
Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? |
title_full |
Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? |
title_fullStr |
Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? |
title_full_unstemmed |
Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? |
title_sort |
is the noble gas‐based rate of ocean warming during the younger dryas overestimated? |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://nrl.northumbria.ac.uk/id/eprint/39343/ https://doi.org/10.1029/2019GL082971 https://nrl.northumbria.ac.uk/id/eprint/39343/16/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/8/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/1/Shackleton%20et%20al%20-%20Is%20the%20noble%20gas-based%20rate%20of%20ocean%20warming%20during%20the%20Younger%20Dryas%20overestimated%20AAM.pdf |
long_lat |
ENVELOPE(162.167,162.167,-77.733,-77.733) |
geographic |
Antarctic Taylor Glacier |
geographic_facet |
Antarctic Taylor Glacier |
genre |
Antarc* Antarctic ice core Taylor Glacier |
genre_facet |
Antarc* Antarctic ice core Taylor Glacier |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/39343/16/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/8/Shackleton_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/39343/1/Shackleton%20et%20al%20-%20Is%20the%20noble%20gas-based%20rate%20of%20ocean%20warming%20during%20the%20Younger%20Dryas%20overestimated%20AAM.pdf Shackleton, S., Bereiter, B., Baggenstos, Daniel, Bauska, Thomas, Brook, Edward J., Marcott, Shaun A. and Severinghaus, Jeffrey P. (2019) Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? Geophysical Research Letters, 46 (11). pp. 5928-5936. ISSN 0094-8276 |
op_doi |
https://doi.org/10.1029/2019GL082971 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
11 |
container_start_page |
5928 |
op_container_end_page |
5936 |
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1766150797410697216 |