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| Titel |
An explanation for the dark region in the western melt zone of the Greenland ice sheet |
| VerfasserIn |
I. G. M. Wientjes, J. Oerlemans  |
| 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. 3 ; Nr. 4, no. 3 (2010-07-23), S.261-268 |
| Datensatznummer |
250001762
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| Publikation (Nr.) |
 copernicus.org/tc-4-261-2010.pdf |
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| Zusammenfassung |
| The western part of the Greenland ice sheet contains a region that is darker
than the surrounding ice. This feature has been analysed with the help of
MODIS images. The dark region appears every year during the summer season and
can always be found at the same location, which makes meltwater unlikely as
the only source for the low albedos. Spectral information indicates that the
ice in this region contains more debris than the ice closer to the margin.
ASTER images reveal a wavy pattern in the darker ice. Based on these findings
we conclude that ice, containing dust from older periods, is presently
outcropping near the margin, leading to albedos lower than observed for the
remaining ablation area. Therefore it can be concluded that the accumulation
of meltwater is a result rather than a cause of the darkening. |
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