Holloway, MD, Sime, LC, Singarayer, JS et al. (2 more authors) (2018) Simulating the 128-ka Antarctic Climate Response to Northern Hemisphere Ice Sheet Melting Using the Isotope-Enabled HadCM3. Geophysical Research Letters, 45 (21). pp. 11921-11929. ISSN 0094-8276
Abstract
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2018, American Geophysical Union. All Rights Reserved. This is the published version of record of the following article: 'Holloway, MD, Sime, LC, Singarayer, JS, Tindall, JC, and Valdes, PJ (2018). Simulating the 128-ka Antarctic Climate Response to Northern Hemisphere Ice Sheet Melting Using the Isotope-Enabled HadCM3. Geophysical Research Letters, 45 (21). pp. 11921-11929,' available at [https://doi.org/10.1029/2018GL079647]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
Keywords: | paleoclimate; ice cores; isotopes; Antarctic; last interglacial |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Earth Surface Science Institute (ESSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Dec 2018 16:13 |
Last Modified: | 04 May 2019 00:44 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1029/2018GL079647 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:140055 |