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DOI: 10.5445/IR/1000087720
Veröffentlicht am 22.11.2018
DOI: 10.3389/feart.2018.00120
Zitationen: 1

Representation of Horizontal Transport Processes in Snowmelt Modeling by Applying a Footprint Approach

Schlögl, Sebastian; Lehning, Michael; Fierz, Charles; Mott, Rebecca

The energy balance of an alpine snow cover significantly changes once the snow cover gets patchy. The local advection of warm air causes above-average snow ablation rates at the upwind edge of the snow patch. As lateral transport processes are typically not considered in models describing surface exchange, e.g., for hydrological or meteorological applications, small-scale variations in snow ablation rates are not resolved. The overall model error in the hydrological model Alpine3D is split into a contribution from the pure “leading edge effect” and a contribution from an increase in the mean air temperature due to a positive snow-albedo feedback mechanism. We found an overall model error for the entire ablation period of 4% for the almost flat alpine test site Gletschboden and 14% for the Wannengrat area, which is located in highly complex terrain including slopes of different aspects. Terrestrial laser scanning measurements at the Gletschboden test site were used to estimate the pure “leading edge effect” and reveal an increase in snow ablation rates of 25–30% at the upwind edge of a snow patch and a total of 4–6% on a catchment sc ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2296-6463
URN: urn:nbn:de:swb:90-877208
KITopen-ID: 1000087720
Erschienen in Frontiers in Earth Science
Band 6
Seiten Art. Nr.: 120
Vorab online veröffentlicht am 08.10.2018
Nachgewiesen in Scopus
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