A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data
The purpose of this paper is to assess the mass changes of the Greenland Ice Sheet (GrIS), Ice Sheets over Antarctica, and Land glaciers and Ice Caps with a global mascon method that yields monthly mass variations at 10,242 mascons. Input for this method are level 2 data from the Gravity Recovery an...
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Online Access: | https://doi.org/10.1002/2013JB010923 http://resolver.tudelft.nl/uuid:8e185c6d-f50a-4697-a7cf-862c442e9fc7 |
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fttudelft:oai:tudelft.nl:uuid:8e185c6d-f50a-4697-a7cf-862c442e9fc7 2023-07-30T03:57:22+02:00 A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data Schrama, E.J.O. (author) Wouters, B. (author) Rietbroek, R. (author) 2014-07-21 https://doi.org/10.1002/2013JB010923 http://resolver.tudelft.nl/uuid:8e185c6d-f50a-4697-a7cf-862c442e9fc7 en eng American Geophysical Union Journal of Geophysical Research: Solid Earth, 119 (7), 2014--0148-0227 https://doi.org/10.1002/2013JB010923 http://resolver.tudelft.nl/uuid:8e185c6d-f50a-4697-a7cf-862c442e9fc7 © 2014 American Geophysical Union mass balance GRACE sea level journal article Text 2014 fttudelft https://doi.org/10.1002/2013JB010923 2023-07-08T20:13:40Z The purpose of this paper is to assess the mass changes of the Greenland Ice Sheet (GrIS), Ice Sheets over Antarctica, and Land glaciers and Ice Caps with a global mascon method that yields monthly mass variations at 10,242 mascons. Input for this method are level 2 data from the Gravity Recovery and Climate Experiment (GRACE) system collected between February 2003 and June 2013 to which a number of corrections are made. With glacial isostatic adjustment (GIA) corrections from an ensemble of models based on different ice histories and rheologic Earth model parameters, we find for Greenland a mass loss of ?278 ± 19 Gt/yr. Whereas the mass balances for the GrIS appear to be less sensitive to GIA modeling uncertainties, this is not the case with the mass balance of Antarctica. Ice history models for Antarctica were recently improved, and updated historic ice height data sets and GPS time series have been used to generate new GIA models. We investigated the effect of two new GIA models for Antarctica and found ?92 ± 26 Gt/yr which is half of what is obtained with ICE-5G-based GIA models, where the largest GIA model differences occur on East Antarctica. The mass balance of land glaciers and ice caps currently stands at ?162 ± 10 Gt/yr. With the help of new GIA models for Antarctica, we assess the mass contribution to the mean sea level at 1.47 ± 0.09 mm/yr or 532 ± 34Gt/yr which is roughly half of the global sea level rise signal obtained from tide gauges and satellite altimetry. Space Engineering Aerospace Engineering Article in Journal/Newspaper Antarc* Antarctica East Antarctica glacier Greenland Ice Sheet Delft University of Technology: Institutional Repository East Antarctica Greenland Journal of Geophysical Research: Solid Earth 119 7 6048 6066 |
institution |
Open Polar |
collection |
Delft University of Technology: Institutional Repository |
op_collection_id |
fttudelft |
language |
English |
topic |
mass balance GRACE sea level |
spellingShingle |
mass balance GRACE sea level Schrama, E.J.O. (author) Wouters, B. (author) Rietbroek, R. (author) A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data |
topic_facet |
mass balance GRACE sea level |
description |
The purpose of this paper is to assess the mass changes of the Greenland Ice Sheet (GrIS), Ice Sheets over Antarctica, and Land glaciers and Ice Caps with a global mascon method that yields monthly mass variations at 10,242 mascons. Input for this method are level 2 data from the Gravity Recovery and Climate Experiment (GRACE) system collected between February 2003 and June 2013 to which a number of corrections are made. With glacial isostatic adjustment (GIA) corrections from an ensemble of models based on different ice histories and rheologic Earth model parameters, we find for Greenland a mass loss of ?278 ± 19 Gt/yr. Whereas the mass balances for the GrIS appear to be less sensitive to GIA modeling uncertainties, this is not the case with the mass balance of Antarctica. Ice history models for Antarctica were recently improved, and updated historic ice height data sets and GPS time series have been used to generate new GIA models. We investigated the effect of two new GIA models for Antarctica and found ?92 ± 26 Gt/yr which is half of what is obtained with ICE-5G-based GIA models, where the largest GIA model differences occur on East Antarctica. The mass balance of land glaciers and ice caps currently stands at ?162 ± 10 Gt/yr. With the help of new GIA models for Antarctica, we assess the mass contribution to the mean sea level at 1.47 ± 0.09 mm/yr or 532 ± 34Gt/yr which is roughly half of the global sea level rise signal obtained from tide gauges and satellite altimetry. Space Engineering Aerospace Engineering |
format |
Article in Journal/Newspaper |
author |
Schrama, E.J.O. (author) Wouters, B. (author) Rietbroek, R. (author) |
author_facet |
Schrama, E.J.O. (author) Wouters, B. (author) Rietbroek, R. (author) |
author_sort |
Schrama, E.J.O. (author) |
title |
A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data |
title_short |
A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data |
title_full |
A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data |
title_fullStr |
A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data |
title_full_unstemmed |
A mascon approach to assess ice sheet and glacier mass balances and their uncertainties from GRACE data |
title_sort |
mascon approach to assess ice sheet and glacier mass balances and their uncertainties from grace data |
publisher |
American Geophysical Union |
publishDate |
2014 |
url |
https://doi.org/10.1002/2013JB010923 http://resolver.tudelft.nl/uuid:8e185c6d-f50a-4697-a7cf-862c442e9fc7 |
geographic |
East Antarctica Greenland |
geographic_facet |
East Antarctica Greenland |
genre |
Antarc* Antarctica East Antarctica glacier Greenland Ice Sheet |
genre_facet |
Antarc* Antarctica East Antarctica glacier Greenland Ice Sheet |
op_relation |
Journal of Geophysical Research: Solid Earth, 119 (7), 2014--0148-0227 https://doi.org/10.1002/2013JB010923 http://resolver.tudelft.nl/uuid:8e185c6d-f50a-4697-a7cf-862c442e9fc7 |
op_rights |
© 2014 American Geophysical Union |
op_doi |
https://doi.org/10.1002/2013JB010923 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
119 |
container_issue |
7 |
container_start_page |
6048 |
op_container_end_page |
6066 |
_version_ |
1772817114309066752 |