Surface energy balance model of Helheim Glacier, Southeast Greenland

M.L. Andersen, T.B. Larsen, M. Nettles, P. Elosegui, A.P. Ahlstrøm, L.A. Stearns, G.S. Hamilton, K. Schild, J.L. Davis, J. de Juan, G. Ekström, R. Forsberg, S.A. Khan, L. Stenseng

Publikation: Bidrag til tidsskriftAbstract i tidsskrift

Resumé

We present a distributed surface energy balance model of Helheim Glacier based on data collected by Automatic Weather Stations (AWSs) in the summer of 2008. Measurements were made at two sites in the ablation zone, at different elevations, overlapping in operation period. Using a digital elevation model we quantify the melt over the entire glacier taking topographic shading and reflection effects into account. A spatial model of the melt rates can be used to search for a correlation between these and occurrences of rapid glacier movement as a test of the hypothesis of melt water-lubricated enhanced flow. This correlation can also provide a basis for estimating the time-lag between melt water generation at the surface and its arrival at the bed through moulins, channels and the like. In addition to quantifying direct mass-loss processes, the model output has multiple uses in future efforts, e.g. crevasse-spreading models or salinity studies of the fjord.
OriginalsprogEngelsk
ArtikelnummerC42A-05
TidsskriftEos Trans. AGU
Vol/bind89
Udgave nummer53, Fall Meet. Suppl.
StatusUdgivet - 2008
BegivenhedAGU Fall Meeting 2008 - San Francisco, USA
Varighed: 15 dec. 200819 dec. 2008

Programområde

  • Programområde 3: Energiressourcer

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