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| Titel |
Spatial and temporal variability of snow depth and ablation rates in a small mountain catchment |
| VerfasserIn |
T. Grünewald, M. Schirmer, R. Mott, M. Lehning |
| 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 ; 4, no. 2 ; Nr. 4, no. 2 (2010-05-28), S.215-225 |
| Datensatznummer |
250001648
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| Publikation (Nr.) |
 copernicus.org/tc-4-215-2010.pdf |
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| Zusammenfassung |
| The spatio-temporal variability of the mountain snow cover determines the
avalanche danger, snow water storage, permafrost distribution and the local
distribution of fauna and flora. Using a new type of terrestrial laser
scanner, which is particularly suited for measurements of snow covered
surfaces, snow depth was monitored in a high alpine catchment during an
ablation period. From these measurements snow water equivalents and ablation
rates were calculated. This allowed us for the first time to obtain a high
resolution (2.5 m cell size) picture of spatial variability of the snow
cover and its temporal development. A very high variability of the snow
cover with snow depths between 0–9 m at the end of the accumulation
season was observed. This variability decreased during the ablation phase,
while the dominant snow deposition features remained intact. The average
daily ablation rate was between 15 mm/d snow water equivalent at the
beginning of the ablation period and 30 mm/d at the end. The spatial
variation of ablation rates increased during the ablation season and could
not be explained in a simple manner by geographical or meteorological
parameters, which suggests significant lateral energy fluxes contributing to
observed melt. It is qualitatively shown that the effect of the lateral
energy transport must increase as the fraction of snow free surfaces
increases during the ablation period. |
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