Effects of Ice Melting on GRACE Observations of Ocean Mass Trends
The Gravity Recovery and Climate Experiment (GRACE) was designed to measure variations in the Earth's gravity field from space at monthly intervals. Researchers have used these data to measure changes in water mass over various regions, including the global oceans and continental ice sheets cov...
Published in: | Geophysical Research Letters |
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Digital Commons @ University of South Florida
2007
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1179 2023-07-30T03:59:18+02:00 Effects of Ice Melting on GRACE Observations of Ocean Mass Trends Chambers, Don P. Tamisiea, Mark E. Nerem, R Steven Ries, John C. 2007-03-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/180 https://doi.org/10.1029/2006GL029171 https://digitalcommons.usf.edu/context/msc_facpub/article/1179/viewcontent/Chambers_et_al_2007_Geophysical_Research_Letters.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/180 doi:10.1029/2006GL029171 https://digitalcommons.usf.edu/context/msc_facpub/article/1179/viewcontent/Chambers_et_al_2007_Geophysical_Research_Letters.pdf default Marine Science Faculty Publications GRACE ocean mass ice mass loss Life Sciences Marine Biology article 2007 ftusouthflorida https://doi.org/10.1029/2006GL029171 2023-07-13T20:24:32Z The Gravity Recovery and Climate Experiment (GRACE) was designed to measure variations in the Earth's gravity field from space at monthly intervals. Researchers have used these data to measure changes in water mass over various regions, including the global oceans and continental ice sheets covering Greenland and Antarctica. However, GRACE data must be smoothed in these analyses and the effects of geocenter motions are not included. In this study, we examine what effect each of these has in the computation of ocean mass trends using a simulation of ice melting on Greenland, Antarctica, and mountain glaciers. We find that the recovered sea level change is systematically lower when coefficients are smoothed and geocenter terms are not included. Assuming current estimates of ice melting, the combined error can be as large as 30–50% of the simulated sea level rise. This is a significant portion of the long‐term sea level change signal, and needs to be considered in any application of GRACE data to estimating long‐term trends in sea level due to gain of water mass from melting ice. Article in Journal/Newspaper Antarc* Antarctica Greenland University of South Florida St. Petersburg: Digital USFSP Greenland Geophysical Research Letters 34 5 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
GRACE ocean mass ice mass loss Life Sciences Marine Biology |
spellingShingle |
GRACE ocean mass ice mass loss Life Sciences Marine Biology Chambers, Don P. Tamisiea, Mark E. Nerem, R Steven Ries, John C. Effects of Ice Melting on GRACE Observations of Ocean Mass Trends |
topic_facet |
GRACE ocean mass ice mass loss Life Sciences Marine Biology |
description |
The Gravity Recovery and Climate Experiment (GRACE) was designed to measure variations in the Earth's gravity field from space at monthly intervals. Researchers have used these data to measure changes in water mass over various regions, including the global oceans and continental ice sheets covering Greenland and Antarctica. However, GRACE data must be smoothed in these analyses and the effects of geocenter motions are not included. In this study, we examine what effect each of these has in the computation of ocean mass trends using a simulation of ice melting on Greenland, Antarctica, and mountain glaciers. We find that the recovered sea level change is systematically lower when coefficients are smoothed and geocenter terms are not included. Assuming current estimates of ice melting, the combined error can be as large as 30–50% of the simulated sea level rise. This is a significant portion of the long‐term sea level change signal, and needs to be considered in any application of GRACE data to estimating long‐term trends in sea level due to gain of water mass from melting ice. |
format |
Article in Journal/Newspaper |
author |
Chambers, Don P. Tamisiea, Mark E. Nerem, R Steven Ries, John C. |
author_facet |
Chambers, Don P. Tamisiea, Mark E. Nerem, R Steven Ries, John C. |
author_sort |
Chambers, Don P. |
title |
Effects of Ice Melting on GRACE Observations of Ocean Mass Trends |
title_short |
Effects of Ice Melting on GRACE Observations of Ocean Mass Trends |
title_full |
Effects of Ice Melting on GRACE Observations of Ocean Mass Trends |
title_fullStr |
Effects of Ice Melting on GRACE Observations of Ocean Mass Trends |
title_full_unstemmed |
Effects of Ice Melting on GRACE Observations of Ocean Mass Trends |
title_sort |
effects of ice melting on grace observations of ocean mass trends |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2007 |
url |
https://digitalcommons.usf.edu/msc_facpub/180 https://doi.org/10.1029/2006GL029171 https://digitalcommons.usf.edu/context/msc_facpub/article/1179/viewcontent/Chambers_et_al_2007_Geophysical_Research_Letters.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland |
genre_facet |
Antarc* Antarctica Greenland |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/180 doi:10.1029/2006GL029171 https://digitalcommons.usf.edu/context/msc_facpub/article/1179/viewcontent/Chambers_et_al_2007_Geophysical_Research_Letters.pdf |
op_rights |
default |
op_doi |
https://doi.org/10.1029/2006GL029171 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
5 |
_version_ |
1772810069069529088 |