Quantifying mass balance processes on the Southern Patagonia Icefield
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 meas...
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ftcdlib:oai:escholarship.org:ark:/13030/qt22s519pk 2023-09-26T15:23:42+02:00 Quantifying mass balance processes on the Southern Patagonia Icefield Schaefer, M Machguth, H Falvey, M Casassa, G Rignot, E 25 - 35 2015-01-01 application/pdf https://escholarship.org/uc/item/22s519pk unknown eScholarship, University of California qt22s519pk https://escholarship.org/uc/item/22s519pk CC-BY The Cryosphere, vol 9, iss 1 Climate Action Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences article 2015 ftcdlib 2023-08-28T18:03:19Z 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. yrg'1 (meters water equivalent per year) as well as the high measured ablation of up to 11 m w.e. yrg'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. Article in Journal/Newspaper The Cryosphere University of California: eScholarship Patagonia |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences Schaefer, M Machguth, H Falvey, M Casassa, G Rignot, E Quantifying mass balance processes on the Southern Patagonia Icefield |
topic_facet |
Climate Action Oceanography Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
description |
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. yrg'1 (meters water equivalent per year) as well as the high measured ablation of up to 11 m w.e. yrg'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. |
format |
Article in Journal/Newspaper |
author |
Schaefer, M Machguth, H Falvey, M Casassa, G Rignot, E |
author_facet |
Schaefer, M Machguth, H Falvey, M Casassa, G Rignot, E |
author_sort |
Schaefer, M |
title |
Quantifying mass balance processes on the Southern Patagonia Icefield |
title_short |
Quantifying mass balance processes on the Southern Patagonia Icefield |
title_full |
Quantifying mass balance processes on the Southern Patagonia Icefield |
title_fullStr |
Quantifying mass balance processes on the Southern Patagonia Icefield |
title_full_unstemmed |
Quantifying mass balance processes on the Southern Patagonia Icefield |
title_sort |
quantifying mass balance processes on the southern patagonia icefield |
publisher |
eScholarship, University of California |
publishDate |
2015 |
url |
https://escholarship.org/uc/item/22s519pk |
op_coverage |
25 - 35 |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, vol 9, iss 1 |
op_relation |
qt22s519pk https://escholarship.org/uc/item/22s519pk |
op_rights |
CC-BY |
_version_ |
1778149997434372096 |