Ivanovic, RF orcid.org/0000-0002-7805-6018, Gregoire, LJ orcid.org/0000-0003-0258-7282, Wickert, AD orcid.org/0000-0002-9545-3365 et al. (1 more author) (2018) Climatic Effect of Antarctic Meltwater Overwhelmed by Concurrent Northern Hemispheric Melt. Geophysical Research Letters, 45 (11). pp. 5681-5689. ISSN 0094-8276
Abstract
Records indicate that 14,500 years ago, sea level rose by 12–22 m in under 340 years. However, the source of the sea level rise remains contentious, partly due to the competing climatic impact of different hemispheric contributions. Antarctic meltwater could indirectly strengthen the Atlantic Meridional Overturning Circulation (AMOC), causing northern warming, whereas Northern Hemisphere ice sheet meltwater has the opposite effect. This story has recently become more intriguing, due to increasing evidence for sea level contributions from both hemispheres. Using a coupled climate model with freshwater forcing, we demonstrate that the climatic influence of southern‐sourced meltwater is overridden by northern sources even when the Antarctic flux is double the North American contribution. This is because the Southern Ocean is quickly resalinized by Antarctic Circumpolar water. These results imply that the pattern of surface climate changes caused by ice sheet melting cannot be used to fingerprint the hemispheric source of the meltwater.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018, The Authors. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
Keywords: | AMOC; MWP1a; meltwater; hosing; stability; ice sheets |
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) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Funding Information: | Funder Grant number NERC UNSPECIFIED NERC NE/K008536/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Jun 2018 14:29 |
Last Modified: | 16 Dec 2024 16:00 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1029/2018GL077623 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:131663 |