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| Titel |
Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period |
| VerfasserIn |
A. M. Dolan, S. J. Hunter, D. J. Hill, A. M. Haywood, S. J. Koenig, B. L. Otto-Bliesner, A. Abe-Ouchi, F. Bragg, W.-L. Chan, M. A. Chandler, C. Contoux, A. Jost, Y. Kamae, G. Lohmann, D. J. Lunt, G. Ramstein, N. A. Rosenbloom, L. Sohl, C. Stepanek, H. Ueda, Q. Yan, Z. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 11, no. 3 ; Nr. 11, no. 3 (2015-03-05), S.403-424 |
| Datensatznummer |
250117207
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| Publikation (Nr.) |
 copernicus.org/cp-11-403-2015.pdf |
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| Zusammenfassung |
During an interval of the Late Pliocene, referred to here as the
mid-Pliocene Warm Period (mPWP; 3.264 to 3.025 million years ago), global
mean temperature was similar to that predicted for the end of this century,
and atmospheric carbon dioxide concentrations were higher than
pre-industrial levels. Sea level was also higher than today, implying a
significant reduction in the extent of the ice sheets. Thus, the mPWP
provides a natural laboratory in which to investigate the long-term response
of the Earth's ice sheets and sea level in a warmer-than-present-day world.
At present, our understanding of the Greenland ice sheet during the mPWP is
generally based upon predictions using single climate and ice sheet models.
Therefore, it is essential that the model dependency of these results is
assessed. The Pliocene Model Intercomparison Project (PlioMIP) has brought
together nine international modelling groups to simulate the warm climate of
the Pliocene. Here we use the climatological fields derived from the
results of the 15 PlioMIP climate models to force an offline ice sheet
model.
We show that mPWP ice sheet reconstructions are highly dependent upon the
forcing climatology used, with Greenland reconstructions ranging from an
ice-free state to a near-modern ice sheet. An analysis of the surface albedo
variability between the climate models over Greenland offers insights into
the drivers of inter-model differences. As we demonstrate that the climate
model dependency of our results is high, we highlight the necessity of
data-based constraints of ice extent in developing our understanding of the
mPWP Greenland ice sheet. |
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