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| Titel |
Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula |
| VerfasserIn |
P. Kuipers Munneke, M. R. Broeke, J. C. King, T. Gray, C. H. Reijmer |
| 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 ; 6, no. 2 ; Nr. 6, no. 2 (2012-03-27), S.353-363 |
| Datensatznummer |
250003483
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| Publikation (Nr.) |
 copernicus.org/tc-6-353-2012.pdf |
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| Zusammenfassung |
| Data collected by two automatic weather stations (AWS) on the Larsen C ice
shelf, Antarctica, between 22 January 2009 and 1 February 2011 are analyzed
and used as input for a model that computes the surface energy budget (SEB),
which includes melt energy. The two AWSs are separated by about 70 km in the
north–south direction, and both the near-surface meteorology and the SEB show
similarities, although small differences in all components (most notably the
melt flux) can be seen. The impact of subsurface absorption of shortwave
radiation on melt and snow temperature is significant, and discussed. In
winter, longwave cooling of the surface is entirely compensated by a downward
turbulent transport of sensible heat. In summer, the positive net radiative
flux is compensated by melt, and quite frequently by upward turbulent
diffusion of heat and moisture, leading to sublimation and weak convection
over the ice shelf. The month of November 2010 is highlighted, when strong
westerly flow over the Antarctic Peninsula led to a dry and warm föhn wind
over the ice shelf, resulting in warm and sunny conditions. Under these
conditions the increase in shortwave and sensible heat fluxes is larger than
the decrease of net longwave and latent heat fluxes, providing energy for
significant melt. |
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