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Freshwater Flux to Sermilik Fjord, SE Greenland : Volume 4, Issue 3 (30/07/2010)

By Mernild, S. H.

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Book Id: WPLBN0003989017
Format Type: PDF Article :
File Size: Pages 30
Reproduction Date: 2015

Title: Freshwater Flux to Sermilik Fjord, SE Greenland : Volume 4, Issue 3 (30/07/2010)  
Author: Mernild, S. H.
Volume: Vol. 4, Issue 3
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2010
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Howat, I. M., Ahn, Y., Liston, G. E., Mernild, S. H., Steffen, K., As, D. V.,...Fog, B. (2010). Freshwater Flux to Sermilik Fjord, SE Greenland : Volume 4, Issue 3 (30/07/2010). Retrieved from http://nook-library.net/


Description
Description: Climate, Ocean, and Sea Ice Modeling Group, Computational Physics and Methods (CCS-2), Los Alamos National Laboratory, New Mexico, USA. Fluctuations in terrestrial surface freshwater flux to Sermilik Fjord, SE Greenland, were simulated and analyzed. SnowModel, a state-of-the-art snow-evolution, snow and ice melt, and runoff modeling system, was used to simulate the temporal and spatial terrestrial runoff distribution to the fjord based on observed meteorological data (1999–2008) from stations located on and around the Greenland Ice Sheet (GrIS). Simulated runoff was compared and verified against independent glacier catchment runoff observations (1999–2005). Modeled runoff to Sermilik Fjord was highly variable, ranging from 2.9×109 m3 y−1 in 1999 to 5.9×109 m3 y−1 in 2005. The uneven spatial runoff distribution produced an areally-averaged annual maximum runoff at the Helheim glacier terminus of more than 3.8 m w.eq. The sub-catchment runoff of the Helheim glacier region accounted for 25% of the total runoff to Sermilik Fjord. The runoff distribution from the different sub-catchments suggested a strong influence from the spatial variation in glacier coverage. To assess the Sermilik Fjord freshwater flux, simulated terrestrial runoff and net precipitation (precipitation minus evaporation and sublimation) for the fjord area were combined with satellite-derived ice discharge and subglacial geothermal and frictional melting due to basal ice motion. A terrestrial freshwater flux of ~40.4×109 m3 y−1 was found for Sermilik Fjord, with an 11% contribution originated from surface runoff. For the Helheim glacier sub-catchment only 4% of the flux originated from terrestrial surface runoff.

Summary
Freshwater flux to Sermilik Fjord, SE Greenland

Excerpt
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