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| Titel |
The 1958-2008 Greenland ice sheet surface melt and the mid-tropospheric atmospheric circulation |
| VerfasserIn |
X. Fettweis, G. Mabille, M. Erpicum, S. Nicolay |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250025994
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| Zusammenfassung |
| With the aim to study the impact of the mid-tropospheric circulation on the Greenland ice
sheet (GrIS) surface melt simulated by the regional climate model MAR, we developed an
automatic Circulation Type Classification (CTC) based on the 500hPa geopotential height
from reanalyses over the 1958-2008 summers. This CTC shows that the dominant mode of
the regional atmospheric variability around the GrIS is linked to the North Atlantic
Oscillation (NAO) and that the surface melt anomalies are highly correlated to the general
circulation. It explains notably why a record surface melt was observed during the
summers 2007 and 2008. In addition, the climate conditions occurring the 27th
August of 2003, where the GrIS temperature was 10oC higher than the normal,
were the consequence of an almost unique 500 hPa circulation in the 50 last years. |
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