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| Titel |
Ice-sheet configuration in the CMIP5/PMIP3 Last Glacial Maximum experiments |
| VerfasserIn |
A. Abe-Ouchi, F. Saito, M. Kageyama, P. Braconnot, S. P. Harrison, K. Lambeck, B. L. Otto-Bliesner, W. R. Peltier, L. Tarasov, J.-Y. Peterschmitt, K. Takahashi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 8, no. 11 ; Nr. 8, no. 11 (2015-11-06), S.3621-3637 |
| Datensatznummer |
250116661
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| Publikation (Nr.) |
 copernicus.org/gmd-8-3621-2015.pdf |
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| Zusammenfassung |
| We describe the creation of a data set describing changes related to the
presence
of ice sheets, including ice-sheet extent and height, ice-shelf extent,
and the distribution and elevation of ice-free land at the Last Glacial
Maximum (LGM), which were used in LGM experiments conducted as part of the fifth
phase of the Coupled Modelling Intercomparison Project (CMIP5) and the
third phase of the Palaeoclimate Modelling Intercomparison Project
(PMIP3).
The CMIP5/PMIP3 data sets were created from reconstructions
made by three different groups, which were all obtained using
a model-inversion approach but differ in the assumptions used in the
modelling and in the type of data used as constraints.
The ice-sheet
extent in the Northern Hemisphere (NH) does
not vary substantially between the three individual data sources.
The difference in the topography of the NH ice sheets is also moderate, and
smaller than the differences between these reconstructions (and the
resultant composite reconstruction) and ice-sheet reconstructions used
in previous generations of PMIP.
Only two of the individual
reconstructions provide information for Antarctica.
The discrepancy
between these two reconstructions is larger than the difference for the
NH ice sheets, although still less than the difference between the
composite reconstruction and previous PMIP ice-sheet
reconstructions.
Although largely confined to the ice-covered regions, differences between the
climate response to the individual LGM reconstructions extend over the North
Atlantic Ocean and Northern Hemisphere continents, partly through atmospheric
stationary waves. Differences between the climate response to the
CMIP5/PMIP3 composite and any individual ice-sheet reconstruction are
smaller than those between the CMIP5/PMIP3 composite and the ice sheet
used in the last phase of PMIP (PMIP2). |
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