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| Titel |
Quantifying mass balance processes on the Southern Patagonia Icefield |
| VerfasserIn |
M. Schaefer, H. Machguth, M. Falvey, G. Casassa, E. Rignot |
| 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. 1 ; Nr. 9, no. 1 (2015-01-06), S.25-35 |
| Datensatznummer |
250116733
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| Publikation (Nr.) |
 copernicus.org/tc-9-25-2015.pdf |
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| Zusammenfassung |
| We present surface mass balance simulations of the Southern Patagonia
Icefield (SPI) driven by downscaled reanalysis data. The simulations were evaluated
and interpreted using geodetic mass balances, measured point balances and a
complete velocity field of the icefield for spring 2004. The high measured
accumulation of snow of up to 15.4 m w.e. yr−1 (meters water equivalent per year) as well
as the high measured ablation of up to 11 m w.e. yr−1 is
reproduced by the model. The overall modeled surface mass balance was
positive and increasing during 1975–2011. Subtracting the surface mass
balance from geodetic balances, calving fluxes were inferred. Mass losses of
the SPI due to calving were strongly increasing from 1975–2000 to 2000–2011
and higher than losses due to surface melt. Calving fluxes were inferred for
the individual glacier catchments and compared to fluxes estimated from
velocity data. Measurements of ice thickness and flow velocities at the
glaciers' front and spatially distributed accumulation measurements can help
to reduce the uncertainties of the different terms in the mass balance of the
Southern Patagonia Icefield. |
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