Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic
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...
Published in: | Remote Sensing of Environment |
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Online Access: | https://orbit.dtu.dk/en/publications/16fca0d4-ccf8-45db-a11c-2cdbb158bf30 https://doi.org/10.1016/j.rse.2015.06.016 |
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ftdtupubl:oai:pure.atira.dk:publications/16fca0d4-ccf8-45db-a11c-2cdbb158bf30 2024-09-15T17:50:57+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, X. Luthcke, S. Moholdt, G. Stober, M. Simonsen, Sebastian Bjerregaard 2015 https://orbit.dtu.dk/en/publications/16fca0d4-ccf8-45db-a11c-2cdbb158bf30 https://doi.org/10.1016/j.rse.2015.06.016 eng eng https://orbit.dtu.dk/en/publications/16fca0d4-ccf8-45db-a11c-2cdbb158bf30 info:eu-repo/semantics/closedAccess Colgan , W , Abdalati , W , Citterio , M , Csatho , B , Fettweis , X , Luthcke , S , Moholdt , G , Stober , M & Simonsen , S B 2015 , ' Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic ' , Remote Sensing of Environment , vol. 168 , pp. 24-39 . https://doi.org/10.1016/j.rse.2015.06.016 Gravimetry Altimetry Glacier Ice sheet Canada Greenland Mass balance article 2015 ftdtupubl https://doi.org/10.1016/j.rse.2015.06.016 2024-07-15T23:49:10Z 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 accumulation 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 Arctic glacier glacier* Greenland Ice Sheet Tidewater Technical University of Denmark: DTU Orbit Remote Sensing of Environment 168 24 39 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Gravimetry Altimetry Glacier Ice sheet Canada Greenland Mass balance |
spellingShingle |
Gravimetry Altimetry Glacier Ice sheet Canada Greenland Mass balance Colgan, W. Abdalati, W. Citterio, M. Csatho, B. Fettweis, X. Luthcke, S. Moholdt, G. Stober, M. Simonsen, Sebastian Bjerregaard Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic |
topic_facet |
Gravimetry Altimetry Glacier Ice sheet Canada Greenland Mass balance |
description |
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 accumulation 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, X. Luthcke, S. Moholdt, G. Stober, M. Simonsen, Sebastian Bjerregaard |
author_facet |
Colgan, W. Abdalati, W. Citterio, M. Csatho, B. Fettweis, X. Luthcke, S. Moholdt, G. Stober, M. Simonsen, Sebastian Bjerregaard |
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 |
publishDate |
2015 |
url |
https://orbit.dtu.dk/en/publications/16fca0d4-ccf8-45db-a11c-2cdbb158bf30 https://doi.org/10.1016/j.rse.2015.06.016 |
genre |
Arctic glacier glacier* Greenland Ice Sheet Tidewater |
genre_facet |
Arctic glacier glacier* Greenland Ice Sheet Tidewater |
op_source |
Colgan , W , Abdalati , W , Citterio , M , Csatho , B , Fettweis , X , Luthcke , S , Moholdt , G , Stober , M & Simonsen , S B 2015 , ' Hybrid inventory, gravimetry and altimetry (HIGA) mass balance product for Greenland and the Canadian Arctic ' , Remote Sensing of Environment , vol. 168 , pp. 24-39 . https://doi.org/10.1016/j.rse.2015.06.016 |
op_relation |
https://orbit.dtu.dk/en/publications/16fca0d4-ccf8-45db-a11c-2cdbb158bf30 |
op_rights |
info:eu-repo/semantics/closedAccess |
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 |
_version_ |
1810292750086569984 |