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| Titel |
Sensitivity of a distributed temperature-radiation index melt model based on AWS observations and surface energy balance fluxes, Hurd Peninsula glaciers, Livingston Island, Antarctica |
| VerfasserIn |
U. Y. Jonsell, F. J. Navarro, M. Bañón, J. J. Lapazaran, J. Otero |
| 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 (2012-05-21), S.539-552 |
| Datensatznummer |
250003590
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| Publikation (Nr.) |
 copernicus.org/tc-6-539-2012.pdf |
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| Zusammenfassung |
| We use an automatic weather station and surface mass balance dataset
spanning four melt seasons collected on Hurd Peninsula Glaciers, South
Shetland Islands, to investigate the point surface energy balance, to
determine the absolute and relative contribution of the various energy
fluxes acting on the glacier surface and to estimate the sensitivity of melt
to ambient temperature changes. Long-wave incoming radiation is the main
energy source for melt, while short-wave radiation is the most important
flux controlling the variation of both seasonal and daily mean surface
energy balance. Short-wave and long-wave radiation fluxes do, in general,
balance each other, resulting in a high correspondence between daily mean
net radiation flux and available melt energy flux. We calibrate a
distributed melt model driven by air temperature and an expression for the
incoming short-wave radiation. The model is calibrated with the data from
one of the melt seasons and validated with the data of the three remaining
seasons. The model results deviate at most 140 mm w.e. from the
corresponding observations using the glaciological method. The model is very
sensitive to changes in ambient temperature: a 0.5 °C increase results
in 56 % higher melt rates. |
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