Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model
Ice shelves - the floating extensions of the Antarctic ice sheet - regulate the Antarctic contribution to sea-level rise by restraining the grounded ice flowing from upstream. Therefore, ice-shelf change (e.g. ice-shelf thinning) results in accelerated ice discharge into the ocean, which has a direc...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/313220 2024-04-28T07:58:11+00:00 Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model Glaude, Quentin Amory, Charles Berger, Sophie Derauw, Dominique Pattyn, Frank Barbier, Christian Orban, Anne 2020-10-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/313220 https://dipot.ulb.ac.be/dspace/bitstream/2013/313220/1/doi_296864.pdf en eng uri/info:doi/10.1109/JSTARS.2020.3008497 uri/info:scp/85089954797 https://dipot.ulb.ac.be/dspace/bitstream/2013/313220/1/doi_296864.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/313220 1 full-text file(s): info:eu-repo/semantics/openAccess I E E E Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 13 Sciences exactes et naturelles Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2020 ftunivbruxelles 2024-04-10T00:12:21Z Ice shelves - the floating extensions of the Antarctic ice sheet - regulate the Antarctic contribution to sea-level rise by restraining the grounded ice flowing from upstream. Therefore, ice-shelf change (e.g. ice-shelf thinning) results in accelerated ice discharge into the ocean, which has a direct effect on sea level. Studying ice-shelf velocity allows the monitoring of the ice shelves' stability and evolution. Differential synthetic aperture radar interferometry (DInSAR) is a common technique from which highly accurate velocity maps can be inferred at high resolution. Because ice shelves are afloat, small sea-level changes - i.e. ocean tides and varying atmospheric pressure (aka inverse barometer effect) lead to vertical displacements. If not accounted for in the interferometric process, these effects will induce a strong bias in the horizontal velocity estimation. In this article, we present an empirical DInSAR correction technique from geophysical models and double DInSAR, with a study on its variance propagation. The method is developed to be used at large coverage on short timescales, essential for the near-continuous monitoring of rapidly changing areas on polar ice sheets. We used Sentinel-1 SAR acquisitions in interferometric wide and extra -wide swath modes. The vertical interferometric bias is estimated using a regional climate model (MAR) and a tide model (CATS2008). The study area is located on the Roi Baudouin Ice Shelf in Dronning Maud Land, East Antarctica. Results show a major decrease (67 m·a-1) in the vertical-induced displacement bias. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences exactes et naturelles Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides |
spellingShingle |
Sciences exactes et naturelles Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides Glaude, Quentin Amory, Charles Berger, Sophie Derauw, Dominique Pattyn, Frank Barbier, Christian Orban, Anne Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model |
topic_facet |
Sciences exactes et naturelles Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides |
description |
Ice shelves - the floating extensions of the Antarctic ice sheet - regulate the Antarctic contribution to sea-level rise by restraining the grounded ice flowing from upstream. Therefore, ice-shelf change (e.g. ice-shelf thinning) results in accelerated ice discharge into the ocean, which has a direct effect on sea level. Studying ice-shelf velocity allows the monitoring of the ice shelves' stability and evolution. Differential synthetic aperture radar interferometry (DInSAR) is a common technique from which highly accurate velocity maps can be inferred at high resolution. Because ice shelves are afloat, small sea-level changes - i.e. ocean tides and varying atmospheric pressure (aka inverse barometer effect) lead to vertical displacements. If not accounted for in the interferometric process, these effects will induce a strong bias in the horizontal velocity estimation. In this article, we present an empirical DInSAR correction technique from geophysical models and double DInSAR, with a study on its variance propagation. The method is developed to be used at large coverage on short timescales, essential for the near-continuous monitoring of rapidly changing areas on polar ice sheets. We used Sentinel-1 SAR acquisitions in interferometric wide and extra -wide swath modes. The vertical interferometric bias is estimated using a regional climate model (MAR) and a tide model (CATS2008). The study area is located on the Roi Baudouin Ice Shelf in Dronning Maud Land, East Antarctica. Results show a major decrease (67 m·a-1) in the vertical-induced displacement bias. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Glaude, Quentin Amory, Charles Berger, Sophie Derauw, Dominique Pattyn, Frank Barbier, Christian Orban, Anne |
author_facet |
Glaude, Quentin Amory, Charles Berger, Sophie Derauw, Dominique Pattyn, Frank Barbier, Christian Orban, Anne |
author_sort |
Glaude, Quentin |
title |
Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model |
title_short |
Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model |
title_full |
Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model |
title_fullStr |
Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model |
title_full_unstemmed |
Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model |
title_sort |
empirical removal of tides and inverse barometer effect on dinsar from double dinsar and a regional climate model |
publishDate |
2020 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/313220 https://dipot.ulb.ac.be/dspace/bitstream/2013/313220/1/doi_296864.pdf |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves |
op_source |
I E E E Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 13 |
op_relation |
uri/info:doi/10.1109/JSTARS.2020.3008497 uri/info:scp/85089954797 https://dipot.ulb.ac.be/dspace/bitstream/2013/313220/1/doi_296864.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/313220 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1797568171889131520 |