 |
| Titel |
Climate of the Last Glacial Maximum: sensitivity studies and model-data comparison with the LOVECLIM coupled model |
| VerfasserIn |
D. M. Roche, T. M. Dokken, H. Goosse, H. Renssen, S. L. Weber |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 3, no. 2 ; Nr. 3, no. 2 (2007-05-15), S.205-224 |
| Datensatznummer |
250000893
|
| Publikation (Nr.) |
 copernicus.org/cp-3-205-2007.pdf |
|
|
|
|
|
| Zusammenfassung |
| The Last Glacial Maximum climate is one of the classical benchmarks used both
to test the ability of coupled models to simulate climates different from
that of the present-day and to better understand the possible range of
mechanisms that could be involved in future climate change. It also bears the
advantage of being one of the most well documented periods with respect to
palaeoclimatic records, allowing a thorough data-model comparison. We present
here an ensemble of Last Glacial Maximum climate simulations obtained with
the Earth System model LOVECLIM, including coupled dynamic atmosphere, ocean
and vegetation components. The climate obtained using standard parameter
values is then compared to available proxy data for the surface ocean,
vegetation, oceanic circulation and atmospheric conditions. Interestingly,
the oceanic circulation obtained resembles that of the present-day, but with
increased overturning rates. As this result is in contradiction with the
current palaeoceanographic view, we ran a range of sensitivity experiments to
explore the response of the model and the possibilities for other oceanic
circulation states. After a critical review of our LGM state with respect to
available proxy data, we conclude that the oceanic circulation obtained is
not inconsistent with ocean circulation proxy data, although the water
characteristics (temperature, salinity) are not in full agreement with water
mass proxy data. The consistency of the simulated state is further reinforced
by the fact that the mean surface climate obtained is shown to be generally
in agreement with the most recent reconstructions of vegetation and sea
surface temperatures, even at regional scales. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|