Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic
peer reviewed We present a novel inversion algorithm that generates a mass balance field that is simultaneously consistent with independent observations of glacier inventory derived from optical imagery, cryosphere-attributed mass trends derived from satellite gravimetry, and ice surface elevation t...
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Online Access: | https://orbi.uliege.be/handle/2268/162261 https://doi.org/10.1016/j.rse.2015.06.016 |
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ftorbi:oai:orbi.ulg.ac.be:2268/162261 2024-04-21T08:02:28+00:00 Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic Colgan, W. Abdalati, W. Citterio, M. Csatho, B. Fettweis, Xavier Luthcke, S. Moholdt, G. Simonsen, S. Stober, M. 2015-07 https://orbi.uliege.be/handle/2268/162261 https://doi.org/10.1016/j.rse.2015.06.016 en eng Elsevier Science http://www.sciencedirect.com/science/article/pii/S0034425715300468 urn:issn:0034-4257 urn:issn:1879-0704 https://orbi.uliege.be/handle/2268/162261 info:hdl:2268/162261 doi:10.1016/j.rse.2015.06.016 scopus-id:2-s2.0-84935490387 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess Remote Sensing of Environment, 168, 24-39 (2015-07) Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2015 ftorbi https://doi.org/10.1016/j.rse.2015.06.016 2024-03-27T14:52:45Z peer reviewed We present a novel inversion algorithm that generates a mass balance field that is simultaneously consistent with independent observations of glacier inventory derived from optical imagery, cryosphere-attributed mass trends derived from satellite gravimetry, and ice surface elevation trends derived from airborne and satellite altimetry. We use this algorithm to assess mass balance across Greenland and the Canadian Arctic over the Sep-2003 to Oct- 2009 period at 26 km resolution. We evaluate local algorithm-inferred mass balance against forty in situ point observations. This evaluation yields an RMSE of 0.15 mWE/a, and highlights a paucity of in situ observations from regions of high dynamic mass loss and peripheral glaciers. We assess mass losses of 212 ± 67 Gt/a to the Greenland ice sheet proper, 38 ± 11 Gt/a to peripheral glaciers in Greenland, and 42 ± 11 Gt/a to glaciers in the Canadian Arctic. These magnitudes of mass loss are dependent on the gravimetry-derived spherical harmonic mass trend we invert. We spatially partition the transient glacier continuity equation by differencing algorithm-inferred mass balance from modeled surface mass balance, in order to solve the horizontal divergence of ice flux as a residual. This residual ice dynamic field infers flux divergence (or submergent flow) in the ice sheet accumu- lation area and at tidewater margins, and flux convergence (or emergent flow) in land-terminating ablation areas, which is consistent with continuum mechanics theory. Article in Journal/Newspaper glacier Greenland Ice Sheet Tidewater University of Liège: ORBi (Open Repository and Bibliography) Remote Sensing of Environment 168 24 39 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Colgan, W. Abdalati, W. Citterio, M. Csatho, B. Fettweis, Xavier Luthcke, S. Moholdt, G. Simonsen, S. Stober, M. Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed We present a novel inversion algorithm that generates a mass balance field that is simultaneously consistent with independent observations of glacier inventory derived from optical imagery, cryosphere-attributed mass trends derived from satellite gravimetry, and ice surface elevation trends derived from airborne and satellite altimetry. We use this algorithm to assess mass balance across Greenland and the Canadian Arctic over the Sep-2003 to Oct- 2009 period at 26 km resolution. We evaluate local algorithm-inferred mass balance against forty in situ point observations. This evaluation yields an RMSE of 0.15 mWE/a, and highlights a paucity of in situ observations from regions of high dynamic mass loss and peripheral glaciers. We assess mass losses of 212 ± 67 Gt/a to the Greenland ice sheet proper, 38 ± 11 Gt/a to peripheral glaciers in Greenland, and 42 ± 11 Gt/a to glaciers in the Canadian Arctic. These magnitudes of mass loss are dependent on the gravimetry-derived spherical harmonic mass trend we invert. We spatially partition the transient glacier continuity equation by differencing algorithm-inferred mass balance from modeled surface mass balance, in order to solve the horizontal divergence of ice flux as a residual. This residual ice dynamic field infers flux divergence (or submergent flow) in the ice sheet accumu- lation area and at tidewater margins, and flux convergence (or emergent flow) in land-terminating ablation areas, which is consistent with continuum mechanics theory. |
format |
Article in Journal/Newspaper |
author |
Colgan, W. Abdalati, W. Citterio, M. Csatho, B. Fettweis, Xavier Luthcke, S. Moholdt, G. Simonsen, S. Stober, M. |
author_facet |
Colgan, W. Abdalati, W. Citterio, M. Csatho, B. Fettweis, Xavier Luthcke, S. Moholdt, G. Simonsen, S. Stober, M. |
author_sort |
Colgan, W. |
title |
Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic |
title_short |
Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic |
title_full |
Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic |
title_fullStr |
Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic |
title_full_unstemmed |
Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic |
title_sort |
hybrid inventory, gravimetry and altimetry (higa) mass balance product for greenland and the canadian arctic |
publisher |
Elsevier Science |
publishDate |
2015 |
url |
https://orbi.uliege.be/handle/2268/162261 https://doi.org/10.1016/j.rse.2015.06.016 |
genre |
glacier Greenland Ice Sheet Tidewater |
genre_facet |
glacier Greenland Ice Sheet Tidewater |
op_source |
Remote Sensing of Environment, 168, 24-39 (2015-07) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S0034425715300468 urn:issn:0034-4257 urn:issn:1879-0704 https://orbi.uliege.be/handle/2268/162261 info:hdl:2268/162261 doi:10.1016/j.rse.2015.06.016 scopus-id:2-s2.0-84935490387 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.rse.2015.06.016 |
container_title |
Remote Sensing of Environment |
container_volume |
168 |
container_start_page |
24 |
op_container_end_page |
39 |
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1796942650804273152 |