Short term mass variability in Greenland, from GRACE
We use twenty-two monthly GRACE (GravityRecovery and Climate Experiment) gravity fields to recover nonsecular mass change in Greenland. The results show large seasonal variability. We compare withmodeled precipitation, evaporation, and runoff derived from ERA40 (the 40-year ECMWF Re-Analysis of the...
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ftawi:oai:epic.awi.de:11761 2023-09-05T13:19:45+02:00 Short term mass variability in Greenland, from GRACE Velicogna, I. Wahr, J. Hanna, E. Huybrechts, Philippe 2005 application/pdf https://epic.awi.de/id/eprint/11761/ https://epic.awi.de/id/eprint/11761/1/Vel2005a.pdf https://doi.org/10.1029/2004GL021948 https://hdl.handle.net/10013/epic.22208 https://hdl.handle.net/10013/epic.22208.d001 unknown https://epic.awi.de/id/eprint/11761/1/Vel2005a.pdf https://hdl.handle.net/10013/epic.22208.d001 Velicogna, I. , Wahr, J. , Hanna, E. and Huybrechts, P. (2005) Short term mass variability in Greenland, from GRACE , Geophysical Research Letters, 32, L05501 . doi:10.1029/2004GL021948 <https://doi.org/10.1029/2004GL021948> , hdl:10013/epic.22208 EPIC3Geophysical Research Letters, 32, L05501 Article isiRev 2005 ftawi https://doi.org/10.1029/2004GL021948 2023-08-22T19:49:32Z We use twenty-two monthly GRACE (GravityRecovery and Climate Experiment) gravity fields to recover nonsecular mass change in Greenland. The results show large seasonal variability. We compare withmodeled precipitation, evaporation, and runoff derived from ERA40 (the 40-year ECMWF Re-Analysis of the global atmosphere). The models seasonal amplitude is controlled by runoff and agrees reasonably well with GRACE. Both GRACE and the model show an April/Maymaximum. 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 agreementis improved. Article in Journal/Newspaper Greenland Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland Geophysical Research Letters 32 5 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We use twenty-two monthly GRACE (GravityRecovery and Climate Experiment) gravity fields to recover nonsecular mass change in Greenland. The results show large seasonal variability. We compare withmodeled precipitation, evaporation, and runoff derived from ERA40 (the 40-year ECMWF Re-Analysis of the global atmosphere). The models seasonal amplitude is controlled by runoff and agrees reasonably well with GRACE. Both GRACE and the model show an April/Maymaximum. 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 agreementis improved. |
format |
Article in Journal/Newspaper |
author |
Velicogna, I. Wahr, J. Hanna, E. Huybrechts, Philippe |
spellingShingle |
Velicogna, I. Wahr, J. Hanna, E. Huybrechts, Philippe Short term mass variability in Greenland, from GRACE |
author_facet |
Velicogna, I. Wahr, J. Hanna, E. Huybrechts, Philippe |
author_sort |
Velicogna, I. |
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 |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/11761/ https://epic.awi.de/id/eprint/11761/1/Vel2005a.pdf https://doi.org/10.1029/2004GL021948 https://hdl.handle.net/10013/epic.22208 https://hdl.handle.net/10013/epic.22208.d001 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
EPIC3Geophysical Research Letters, 32, L05501 |
op_relation |
https://epic.awi.de/id/eprint/11761/1/Vel2005a.pdf https://hdl.handle.net/10013/epic.22208.d001 Velicogna, I. , Wahr, J. , Hanna, E. and Huybrechts, P. (2005) Short term mass variability in Greenland, from GRACE , Geophysical Research Letters, 32, L05501 . doi:10.1029/2004GL021948 <https://doi.org/10.1029/2004GL021948> , hdl:10013/epic.22208 |
op_doi |
https://doi.org/10.1029/2004GL021948 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
5 |
_version_ |
1776200580991025152 |