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| Titel |
Simulating melt, runoff and refreezing on Nordenskiöldbreen, Svalbard, using a coupled snow and energy balance model |
| VerfasserIn |
W. J. J. Pelt, J. Oerlemans  , C. H. Reijmer, V. A. Pohjola, R. Pettersson, J. H. Angelen |
| 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 ; 6, no. 3 ; Nr. 6, no. 3 (2012-06-08), S.641-659 |
| Datensatznummer |
250003597
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| Publikation (Nr.) |
 copernicus.org/tc-6-641-2012.pdf |
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| Zusammenfassung |
| A distributed energy balance model is coupled to a multi-layer snow model in
order to study the mass balance evolution and the impact of refreezing on the
mass budget of Nordenskiöldbreen, Svalbard. The model is forced with output
from the regional climate model RACMO and meteorological data from Svalbard
Airport. Extensive calibration and initialisation are performed to increase
the model accuracy. For the period 1989–2010, we find a mean net mass
balance of −0.39 m w.e. a−1. Refreezing contributes on average
0.27 m w.e. a−1 to the mass budget and is most pronounced in the
accumulation zone. The simulated mass balance, radiative fluxes and
subsurface profiles are validated against observations and are generally in
good agreement. Climate sensitivity experiments reveal a non-linear,
seasonally dependent response of the mass balance, refreezing and runoff to
changes in temperature and precipitation. It is shown that including
seasonality in climate change, with less pronounced summer warming, reduces
the sensitivity of the mass balance and equilibrium line altitude (ELA) estimates in a future climate.
The amount of refreezing is shown to be rather insensitive to changes in
climate. |
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