DOI 10.1007/s00190-009-0323-4 ORIGINAL ARTICLE A comparison of coincident GRACE and ICESat data over
© The Author(s) 2009. This article is published with open access at Springerlink.com Abstract In this study, we present a comparison of coinci-dent GRACE and ICESat data over Antarctica. The analysis focused on the secular changes over a 4-year period span-ning from 2003 to 2007, using the recently...
| Main Authors: | , , , , , , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.565 http://repository.tudelft.nl/assets/uuid:1e638cdb-4c79-48e9-a76e-3df225c73af7/gunter_2009.pdf |
| Summary: | © The Author(s) 2009. This article is published with open access at Springerlink.com Abstract In this study, we present a comparison of coinci-dent GRACE and ICESat data over Antarctica. The analysis focused on the secular changes over a 4-year period span-ning from 2003 to 2007, using the recently reprocessed and publicly available data sets for both missions. The results show that the two independent data sets possess strong spa-tial correlations, but that there are several factors that can sig-nificantly impact the total derived ice mass variability from both missions. For GRACE, the primary source of uncer-tainty comes from the modelling of glacial isostatic adjust-ment, along with the estimates of C2,0 and the degree one terms. For ICESat, it is shown that assumptions about firn density, rate biases, and the sampling interval of the various laser campaigns can have large effects on the results. Despite these uncertainties, the similarities that do exist indicate a strong potential for the future refinement of both GIA and mass balance estimates of Antarctica. |
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