Short term mass variability in Greenland, from GRACE

We use twenty-two monthly GRACE (Gravity Recovery and Climate Experiment) gravity fields to recover nonsecular mass change in Greenland. The results show large seasonal variability. We compare with modeled precipitation, evaporation, and runoff derived from ERA40 (the 40-year ECMWF Re-Analysis of th...

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Published in:Geophysical Research Letters
Main Authors: Velicogna, Isabella, Wahr, J., Hanna, E., Huybrechts, P.
Format: Article in Journal/Newspaper
Language:English
Published: eScholarship, University of California 2005
Subjects:
Physical Sciences and Mathematics
ice-sheet
climate experiment
gravity recovery
retention
glacier
balance
sea
Greenland
Ice Sheet
Online Access:http://www.escholarship.org/uc/item/27m220r2
id ftcdlib:qt27m220r2
record_format openpolar
spelling ftcdlib:qt27m220r2 2023-05-15T16:21:10+02:00 Short term mass variability in Greenland, from GRACE Velicogna, Isabella Wahr, J. Hanna, E. Huybrechts, P. 2005-01-01 application/pdf http://www.escholarship.org/uc/item/27m220r2 english eng eScholarship, University of California qt27m220r2 http://www.escholarship.org/uc/item/27m220r2 Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Velicogna, Isabella; Wahr, J.; Hanna, E.; & Huybrechts, P.(2005). Short term mass variability in Greenland, from GRACE. Geophysical Research Letters, 32(5). doi:10.1029/2004GL021948. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/27m220r2 Physical Sciences and Mathematics ice-sheet climate experiment gravity recovery retention glacier balance sea article 2005 ftcdlib https://doi.org/10.1029/2004GL021948 2016-04-02T18:31:48Z We use twenty-two monthly GRACE (Gravity Recovery and Climate Experiment) gravity fields to recover nonsecular mass change in Greenland. The results show large seasonal variability. We compare with modeled precipitation, evaporation, and runoff derived from ERA40 (the 40-year ECMWF Re-Analysis of the global atmosphere). The model's seasonal amplitude is controlled by runoff and agrees reasonably well with GRACE. Both GRACE and the model show an April/May maximum. But the GRACE results show a delayed minimum relative to the model. This difference is probably associated with omissions in the runoff model, ice discharge, subglacial hydrology, mass loss by blowing-snow, and hydrology in ice-free regions. The discrepancy is smaller, but still significant, for south Greenland alone. When we include a proxy for ice discharge the agreement is improved. Article in Journal/Newspaper glacier Greenland Ice Sheet University of California: eScholarship Greenland Geophysical Research Letters 32 5
institution Open Polar
collection University of California: eScholarship
op_collection_id ftcdlib
language English
topic Physical Sciences and Mathematics
ice-sheet
climate experiment
gravity recovery
retention
glacier
balance
sea
spellingShingle Physical Sciences and Mathematics
ice-sheet
climate experiment
gravity recovery
retention
glacier
balance
sea
Velicogna, Isabella
Wahr, J.
Hanna, E.
Huybrechts, P.
Short term mass variability in Greenland, from GRACE
topic_facet Physical Sciences and Mathematics
ice-sheet
climate experiment
gravity recovery
retention
glacier
balance
sea
description We use twenty-two monthly GRACE (Gravity Recovery and Climate Experiment) gravity fields to recover nonsecular mass change in Greenland. The results show large seasonal variability. We compare with modeled precipitation, evaporation, and runoff derived from ERA40 (the 40-year ECMWF Re-Analysis of the global atmosphere). The model's seasonal amplitude is controlled by runoff and agrees reasonably well with GRACE. Both GRACE and the model show an April/May maximum. But the GRACE results show a delayed minimum relative to the model. This difference is probably associated with omissions in the runoff model, ice discharge, subglacial hydrology, mass loss by blowing-snow, and hydrology in ice-free regions. The discrepancy is smaller, but still significant, for south Greenland alone. When we include a proxy for ice discharge the agreement is improved.
format Article in Journal/Newspaper
author Velicogna, Isabella
Wahr, J.
Hanna, E.
Huybrechts, P.
author_facet Velicogna, Isabella
Wahr, J.
Hanna, E.
Huybrechts, P.
author_sort Velicogna, Isabella
title Short term mass variability in Greenland, from GRACE
title_short Short term mass variability in Greenland, from GRACE
title_full Short term mass variability in Greenland, from GRACE
title_fullStr Short term mass variability in Greenland, from GRACE
title_full_unstemmed Short term mass variability in Greenland, from GRACE
title_sort short term mass variability in greenland, from grace
publisher eScholarship, University of California
publishDate 2005
url http://www.escholarship.org/uc/item/27m220r2
geographic Greenland
geographic_facet Greenland
genre glacier
Greenland
Ice Sheet
genre_facet glacier
Greenland
Ice Sheet
op_source Velicogna, Isabella; Wahr, J.; Hanna, E.; & Huybrechts, P.(2005). Short term mass variability in Greenland, from GRACE. Geophysical Research Letters, 32(5). doi:10.1029/2004GL021948. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/27m220r2
op_relation qt27m220r2
http://www.escholarship.org/uc/item/27m220r2
op_rights Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/
op_rightsnorm CC-BY
op_doi https://doi.org/10.1029/2004GL021948
container_title Geophysical Research Letters
container_volume 32
container_issue 5
_version_ 1766009188814684160

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