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| Titel |
Snowdrift modelling for the Vestfonna ice cap, north-eastern Svalbard |
| VerfasserIn |
T. Sauter, M. Möller, R. Finkelnburg, M. Grabiec, D. Scherer, C. Schneider |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 7, no. 4 ; Nr. 7, no. 4 (2013-08-12), S.1287-1301 |
| Datensatznummer |
250085147
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| Publikation (Nr.) |
 copernicus.org/tc-7-1287-2013.pdf |
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| Zusammenfassung |
| The redistribution of snow by drifting and blowing snow frequently leads to
an inhomogeneous snow mass distribution on larger ice caps. Together with the
thermodynamic impact of drifting snow sublimation on the lower atmospheric
boundary layer, these processes affect the glacier surface mass balance. This
study provides a first quantification of snowdrift and sublimation of blowing
and drifting snow on the Vestfonna ice cap (Svalbard) by using the specifically
designed snow2blow snowdrift model. The model is forced by atmospheric
fields from the Polar Weather Research and Forecasting model and resolves
processes on a spatial resolution of 250 m. The model is applied to
the Vestfonna ice cap for the accumulation period 2008/2009. Comparison with
radio-echo soundings and snow-pit measurements show that important local-scale
processes are resolved by the model and the overall snow accumulation pattern
is reproduced. The findings indicate that there is a significant
redistribution of snow mass from the interior of the ice cap to the
surrounding areas and ice slopes. Drifting snow sublimation of suspended snow
is found to be stronger during spring. It is concluded that the
redistribution process is strong enough to have a significant impact on
glacier mass balance. |
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