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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Published in:Journal of Geophysical Research: Solid Earth
Main Authors: Schrama, E.J.O. (author), Wouters, B. (author), Rietbroek, R. (author)
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union 2014
Subjects:
Online Access:https://doi.org/10.1002/2013JB010923
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spelling 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
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