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| Titel |
Wintertime storage of water in buried supraglacial lakes across the Greenland Ice Sheet |
| VerfasserIn |
L. S. Koenig, D. J. Lampkin, L. N. Montgomery, S. L. Hamilton, J. B. Turrin, C. A. Joseph, S. E. Moutsafa, B. Panzer, K. A. Casey, J. D. Paden, C. Leuschen, P. Gogineni |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2015-07-13), S.1333-1342 |
| Datensatznummer |
250116819
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| Publikation (Nr.) |
 copernicus.org/tc-9-1333-2015.pdf |
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| Zusammenfassung |
| Increased surface melt over the Greenland Ice Sheet (GrIS) is now estimated
to account for half or more of the ice sheet's total mass loss. Here, we
show that some meltwater is stored, over winter, in buried supraglacial
lakes. We use airborne radar from Operation IceBridge between 2009 and 2012
to detect buried supraglacial lakes, and we find that they were distributed
extensively around the GrIS margin through that period. Buried supraglacial
lakes can persist through multiple winters and are, on average,
~ 1.9 + 0.2 m below the surface. Most buried supraglacial
lakes exist with no surface expression of their occurrence in visible
imagery. The few buried supraglacial lakes that do exhibit surface
expression have a unique visible signature associated with a darker blue
color where subsurface water is located. The volume of retained water in the
buried supraglacial lakes is likely insignificant compared to the total mass
loss from the GrIS, but the water may have important implications locally
for the development of the englacial hydrologic system and ice temperatures.
Buried supraglacial lakes represent a small but year-round source of
meltwater in the GrIS hydrologic system. |
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