Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data
Long-term altimetry data are one of the major sources to analyze the change in global ice reserves. This study focuses on the elevation and volume changes in the Greenland ice sheet (GrIS) from 2010 to 2019 derived from altimetry observations. In this study, the methods for determining surface eleva...
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ftdoajarticles:oai:doaj.org/article:5b4e00e6a48d4d51a723ebc21109d631 2023-05-15T13:07:34+02:00 Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data Guodong Chen Shengjun Zhang Shenghao Liang Jiaheng Zhu 2021-05-01T00:00:00Z https://doi.org/10.3389/feart.2021.674983 https://doaj.org/article/5b4e00e6a48d4d51a723ebc21109d631 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2021.674983/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.674983 https://doaj.org/article/5b4e00e6a48d4d51a723ebc21109d631 Frontiers in Earth Science, Vol 9 (2021) altimetry Greenland ice sheet Arctic volume loss elevation change Science Q article 2021 ftdoajarticles https://doi.org/10.3389/feart.2021.674983 2022-12-31T16:38:24Z Long-term altimetry data are one of the major sources to analyze the change in global ice reserves. This study focuses on the elevation and volume changes in the Greenland ice sheet (GrIS) from 2010 to 2019 derived from altimetry observations. In this study, the methods for determining surface elevation change rates are discussed, and specific strategies are designed. A new elevation difference method is proposed for CryoSat-2 synthetic aperture interferometric (SARin) mode observations. Through validation with Airborne Topographic Mapper (ATM) data, this new method is proved to be effective for slope terrains at the margins of the ice sheet. Meanwhile, a surface fit method is applied for the flat interior of the ice sheet where low resolution mode (LRM) observations are provided. The results of elevation change rates in the GrIS from 2010 to 2019 are eventually calculated by combining CryoSat-2 and ATM observations. An elevation change rate of −11.83 ± 1.14 cm·a−1 is revealed, corresponding to a volume change rate of −200.22 ± 18.26 km3·a−1. The results are compared with the elevation changes determined by Ice, Cloud, and Land Elevation Satellite (ICESat) from 2003 to 2009. Our results show that the overall volume change rate in the GrIS slowed down by approximately 10% during the past decade, and that the main contributor of GrIS ice loss has shifted from the southeast coast to the west margin of the ice sheet. Article in Journal/Newspaper Airborne Topographic Mapper Arctic Greenland Ice Sheet Directory of Open Access Journals: DOAJ Articles Arctic Greenland Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
altimetry Greenland ice sheet Arctic volume loss elevation change Science Q |
spellingShingle |
altimetry Greenland ice sheet Arctic volume loss elevation change Science Q Guodong Chen Shengjun Zhang Shenghao Liang Jiaheng Zhu Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data |
topic_facet |
altimetry Greenland ice sheet Arctic volume loss elevation change Science Q |
description |
Long-term altimetry data are one of the major sources to analyze the change in global ice reserves. This study focuses on the elevation and volume changes in the Greenland ice sheet (GrIS) from 2010 to 2019 derived from altimetry observations. In this study, the methods for determining surface elevation change rates are discussed, and specific strategies are designed. A new elevation difference method is proposed for CryoSat-2 synthetic aperture interferometric (SARin) mode observations. Through validation with Airborne Topographic Mapper (ATM) data, this new method is proved to be effective for slope terrains at the margins of the ice sheet. Meanwhile, a surface fit method is applied for the flat interior of the ice sheet where low resolution mode (LRM) observations are provided. The results of elevation change rates in the GrIS from 2010 to 2019 are eventually calculated by combining CryoSat-2 and ATM observations. An elevation change rate of −11.83 ± 1.14 cm·a−1 is revealed, corresponding to a volume change rate of −200.22 ± 18.26 km3·a−1. The results are compared with the elevation changes determined by Ice, Cloud, and Land Elevation Satellite (ICESat) from 2003 to 2009. Our results show that the overall volume change rate in the GrIS slowed down by approximately 10% during the past decade, and that the main contributor of GrIS ice loss has shifted from the southeast coast to the west margin of the ice sheet. |
format |
Article in Journal/Newspaper |
author |
Guodong Chen Shengjun Zhang Shenghao Liang Jiaheng Zhu |
author_facet |
Guodong Chen Shengjun Zhang Shenghao Liang Jiaheng Zhu |
author_sort |
Guodong Chen |
title |
Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data |
title_short |
Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data |
title_full |
Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data |
title_fullStr |
Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data |
title_full_unstemmed |
Elevation and Volume Changes in Greenland Ice Sheet From 2010 to 2019 Derived From Altimetry Data |
title_sort |
elevation and volume changes in greenland ice sheet from 2010 to 2019 derived from altimetry data |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.674983 https://doaj.org/article/5b4e00e6a48d4d51a723ebc21109d631 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Airborne Topographic Mapper Arctic Greenland Ice Sheet |
genre_facet |
Airborne Topographic Mapper Arctic Greenland Ice Sheet |
op_source |
Frontiers in Earth Science, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2021.674983/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.674983 https://doaj.org/article/5b4e00e6a48d4d51a723ebc21109d631 |
op_doi |
https://doi.org/10.3389/feart.2021.674983 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
_version_ |
1766059860221231104 |