Gasson, E. orcid.org/0000-0003-4653-6217, DeConto, R. and Pollard, D. (2016) Modeling the oxygen isotope composition of the Antarctic ice sheet and its significance to Pliocene sea leve. Geology. ISSN 0091-7613
Abstract
Recent estimates of global mean sea level based on the oxygen isotope composition of mid-Pliocene benthic foraminifera vary from 9 to 21 m above present, which has differing implications for the past stability of the Antarctic ice sheet during an interval with atmospheric CO2 comparable to present. Here we simulate the oxygen isotope composition of the Antarctic ice sheet for a range of configurations using isotope-enabled climate and ice sheet models. We identify which ice-sheet configurations are consistent with the oxygen isotope record and suggest a maximum contribution from Antarctica to the mid-Pliocene sea level highstand of ~13 m. We also highlight that the relationship between the oxygen isotope record and sea level is not constant when ice is lost from deep marine basins, which has important implications for the use of oxygen isotopes as a sea level proxy.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Geological Society of America. This is an author produced version of a paper subsequently published in Geology. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Social Sciences (Sheffield) > Department of Geography (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 06 Sep 2016 10:22 |
Last Modified: | 30 Aug 2017 22:13 |
Published Version: | http://dx.doi.org/10.1130/G38104.1 |
Status: | Published |
Publisher: | Geological Society of America |
Refereed: | Yes |
Identification Number: | 10.1130/G38104.1 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104333 |