Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density
Three different methods for deriving elevation changes from the ICESat altimetry dataset are used. This multi-method approach provides a method to assess the complexity of deriving elevation changes from this dataset. The altimetry alone can not provide an estimate of the mass balance of the Greenla...
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Online Access: | http://hdl.handle.net/11585/771805 https://doi.org/10.5194/tc-5-173-2011 http://www.the-cryosphere.net/5/173/2011/tc-5-173-2011.html |
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ftunibolognairis:oai:cris.unibo.it:11585/771805 2024-04-14T08:12:15+00:00 Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density L. S. SØRENSEN S. B. SIMONSEN K. NIELSEN P. LUCAS PICHER SPADA, GIORGIO G. ADALGEIRSDOTTIR R. FORSBERG C. S. HVIDBERG L. S. SØRENSEN S. B. SIMONSEN K. NIELSEN P. LUCAS PICHER SPADA, GIORGIO G. ADALGEIRSDOTTIR R. FORSBERG C. S. HVIDBERG 2011 STAMPA http://hdl.handle.net/11585/771805 https://doi.org/10.5194/tc-5-173-2011 http://www.the-cryosphere.net/5/173/2011/tc-5-173-2011.html eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000288988500014 volume:5 issue:1 firstpage:173 lastpage:186 numberofpages:14 journal:THE CRYOSPHERE http://hdl.handle.net/11585/771805 doi:10.5194/tc-5-173-2011 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79952479280 http://www.the-cryosphere.net/5/173/2011/tc-5-173-2011.html N/A info:eu-repo/semantics/article 2011 ftunibolognairis https://doi.org/10.5194/tc-5-173-2011 2024-03-21T18:28:27Z Three different methods for deriving elevation changes from the ICESat altimetry dataset are used. This multi-method approach provides a method to assess the complexity of deriving elevation changes from this dataset. The altimetry alone can not provide an estimate of the mass balance of the Greenland ice sheet. Firn dynamics and surface densities are important factors that contribute to the mass change derived from remote-sensing altimetry. The volume change derived from ICESat data is corrected for changes in firn compaction over the observation period, vertical bedrock movement and an intercampaign elevation bias in the ICESat data. Subsequently, the corrected volume change is converted into mass change by the application of a simple surface density model, in which some of the ice dynamics are accounted for. The firn compaction and density models are driven by the HIRHAM5 regional climate model, forced by the ERA-Interim re-analysis product, at the lateral boundaries. We find annual mass loss estimates of the Greenland ice sheet in the range of 191 ± 23 Gt yr−1 to 240 ± 28 Gt yr−1 for the period October 2003 to March 2008. These results are in good agreement with several other studies of the Greenland ice sheet mass balance, based on different remote-sensing techniques. Article in Journal/Newspaper Greenland Ice Sheet IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Greenland The Cryosphere 5 1 173 186 |
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Open Polar |
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IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
N/A |
spellingShingle |
N/A L. S. SØRENSEN S. B. SIMONSEN K. NIELSEN P. LUCAS PICHER SPADA, GIORGIO G. ADALGEIRSDOTTIR R. FORSBERG C. S. HVIDBERG Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density |
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N/A |
description |
Three different methods for deriving elevation changes from the ICESat altimetry dataset are used. This multi-method approach provides a method to assess the complexity of deriving elevation changes from this dataset. The altimetry alone can not provide an estimate of the mass balance of the Greenland ice sheet. Firn dynamics and surface densities are important factors that contribute to the mass change derived from remote-sensing altimetry. The volume change derived from ICESat data is corrected for changes in firn compaction over the observation period, vertical bedrock movement and an intercampaign elevation bias in the ICESat data. Subsequently, the corrected volume change is converted into mass change by the application of a simple surface density model, in which some of the ice dynamics are accounted for. The firn compaction and density models are driven by the HIRHAM5 regional climate model, forced by the ERA-Interim re-analysis product, at the lateral boundaries. We find annual mass loss estimates of the Greenland ice sheet in the range of 191 ± 23 Gt yr−1 to 240 ± 28 Gt yr−1 for the period October 2003 to March 2008. These results are in good agreement with several other studies of the Greenland ice sheet mass balance, based on different remote-sensing techniques. |
author2 |
L. S. SØRENSEN S. B. SIMONSEN K. NIELSEN P. LUCAS PICHER SPADA, GIORGIO G. ADALGEIRSDOTTIR R. FORSBERG C. S. HVIDBERG |
format |
Article in Journal/Newspaper |
author |
L. S. SØRENSEN S. B. SIMONSEN K. NIELSEN P. LUCAS PICHER SPADA, GIORGIO G. ADALGEIRSDOTTIR R. FORSBERG C. S. HVIDBERG |
author_facet |
L. S. SØRENSEN S. B. SIMONSEN K. NIELSEN P. LUCAS PICHER SPADA, GIORGIO G. ADALGEIRSDOTTIR R. FORSBERG C. S. HVIDBERG |
author_sort |
L. S. SØRENSEN |
title |
Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density |
title_short |
Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density |
title_full |
Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density |
title_fullStr |
Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density |
title_full_unstemmed |
Mass balance of the Greenland ice sheet (2003-2008) from ICESat data - The impact of interpolation, sampling and firn density |
title_sort |
mass balance of the greenland ice sheet (2003-2008) from icesat data - the impact of interpolation, sampling and firn density |
publishDate |
2011 |
url |
http://hdl.handle.net/11585/771805 https://doi.org/10.5194/tc-5-173-2011 http://www.the-cryosphere.net/5/173/2011/tc-5-173-2011.html |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000288988500014 volume:5 issue:1 firstpage:173 lastpage:186 numberofpages:14 journal:THE CRYOSPHERE http://hdl.handle.net/11585/771805 doi:10.5194/tc-5-173-2011 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79952479280 http://www.the-cryosphere.net/5/173/2011/tc-5-173-2011.html |
op_doi |
https://doi.org/10.5194/tc-5-173-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
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1 |
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173 |
op_container_end_page |
186 |
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