Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3
Warmer than present Antarctic and Southern Ocean temperatures during the last interglacial, approximately 128,000 years ago, have been attributed to changes in north‐south ocean heat transport, causing opposing hemispheric temperature anomalies. We investigate the magnitude of Antarctic warming and...
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American Geophysical Union
2018
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Online Access: | https://centaur.reading.ac.uk/80623/ https://centaur.reading.ac.uk/80623/1/Holloway_et_al-2018-Geophysical_Research_Letters%20%281%29%20%281%29.pdf |
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ftunivreading:oai:centaur.reading.ac.uk:80623 2024-09-15T17:40:34+00:00 Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 Holloway, Max D. Sime, Louise C. Singarayer, Joy S. Tindall, Julia C. Valdes, Paul J. 2018-11-16 text https://centaur.reading.ac.uk/80623/ https://centaur.reading.ac.uk/80623/1/Holloway_et_al-2018-Geophysical_Research_Letters%20%281%29%20%281%29.pdf en eng American Geophysical Union https://centaur.reading.ac.uk/80623/1/Holloway_et_al-2018-Geophysical_Research_Letters%20%281%29%20%281%29.pdf Holloway, M. D., Sime, L. C., Singarayer, J. S. <https://centaur.reading.ac.uk/view/creators/90005422.html>, Tindall, J. C. and Valdes, P. J. (2018) Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3. Geophysical Research Letters, 45 (21). 11,921-11,929. ISSN 0094-8276 doi: https://doi.org/10.1029/2018gl079647 <https://doi.org/10.1029/2018gl079647> Article PeerReviewed 2018 ftunivreading https://doi.org/10.1029/2018gl079647 2024-06-25T15:02:19Z Warmer than present Antarctic and Southern Ocean temperatures during the last interglacial, approximately 128,000 years ago, have been attributed to changes in north‐south ocean heat transport, causing opposing hemispheric temperature anomalies. We investigate the magnitude of Antarctic warming and Antarctic ice core isotopic enrichment in response to Northern Hemisphere meltwater input during the early last interglacial. A 1,600‐year HadCM3 simulation driven by 0.25 Sv of meltwater input reproduces 50–60% of the peak Southern Ocean summer sea surface temperature anomaly, sea ice retreat, and ice core isotope enrichment. We also find a robust increase in the proportion of cold season precipitation during the last interglacial, leading to lower isotopic values at the Antarctic ice core sites. These results suggest that a HadCM3 simulation including 0.25 Sv for 3,000–4,000 years would reconcile the last interglacial observations, providing a potential solution for the last interglacial missing heat problem. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet Sea ice Southern Ocean CentAUR: Central Archive at the University of Reading Geophysical Research Letters 45 21 11,921 11,929 |
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CentAUR: Central Archive at the University of Reading |
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ftunivreading |
language |
English |
description |
Warmer than present Antarctic and Southern Ocean temperatures during the last interglacial, approximately 128,000 years ago, have been attributed to changes in north‐south ocean heat transport, causing opposing hemispheric temperature anomalies. We investigate the magnitude of Antarctic warming and Antarctic ice core isotopic enrichment in response to Northern Hemisphere meltwater input during the early last interglacial. A 1,600‐year HadCM3 simulation driven by 0.25 Sv of meltwater input reproduces 50–60% of the peak Southern Ocean summer sea surface temperature anomaly, sea ice retreat, and ice core isotope enrichment. We also find a robust increase in the proportion of cold season precipitation during the last interglacial, leading to lower isotopic values at the Antarctic ice core sites. These results suggest that a HadCM3 simulation including 0.25 Sv for 3,000–4,000 years would reconcile the last interglacial observations, providing a potential solution for the last interglacial missing heat problem. |
format |
Article in Journal/Newspaper |
author |
Holloway, Max D. Sime, Louise C. Singarayer, Joy S. Tindall, Julia C. Valdes, Paul J. |
spellingShingle |
Holloway, Max D. Sime, Louise C. Singarayer, Joy S. Tindall, Julia C. Valdes, Paul J. Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 |
author_facet |
Holloway, Max D. Sime, Louise C. Singarayer, Joy S. Tindall, Julia C. Valdes, Paul J. |
author_sort |
Holloway, Max D. |
title |
Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 |
title_short |
Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 |
title_full |
Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 |
title_fullStr |
Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 |
title_full_unstemmed |
Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3 |
title_sort |
simulating the 128-ka antarctic climate response to northern hemisphere ice sheet melting using the isotope-enabled hadcm3 |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://centaur.reading.ac.uk/80623/ https://centaur.reading.ac.uk/80623/1/Holloway_et_al-2018-Geophysical_Research_Letters%20%281%29%20%281%29.pdf |
genre |
Antarc* Antarctic ice core Ice Sheet Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic ice core Ice Sheet Sea ice Southern Ocean |
op_relation |
https://centaur.reading.ac.uk/80623/1/Holloway_et_al-2018-Geophysical_Research_Letters%20%281%29%20%281%29.pdf Holloway, M. D., Sime, L. C., Singarayer, J. S. <https://centaur.reading.ac.uk/view/creators/90005422.html>, Tindall, J. C. and Valdes, P. J. (2018) Simulating the 128-ka Antarctic climate response to Northern Hemisphere ice sheet melting using the isotope-enabled HadCM3. Geophysical Research Letters, 45 (21). 11,921-11,929. ISSN 0094-8276 doi: https://doi.org/10.1029/2018gl079647 <https://doi.org/10.1029/2018gl079647> |
op_doi |
https://doi.org/10.1029/2018gl079647 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
21 |
container_start_page |
11,921 |
op_container_end_page |
11,929 |
_version_ |
1810486605770653696 |