Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model
peer reviewed 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...
Published in: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
---|---|
Main Authors: | , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Institute of Electrical and Electronics Engineers
2020
|
Subjects: | |
Online Access: | https://orbi.uliege.be/handle/2268/251244 https://orbi.uliege.be/bitstream/2268/251244/1/09138726.pdf https://doi.org/10.1109/JSTARS.2020.3008497 |
id |
ftorbi:oai:orbi.ulg.ac.be:2268/251244 |
---|---|
record_format |
openpolar |
spelling |
ftorbi:oai:orbi.ulg.ac.be:2268/251244 2024-04-21T07:49:56+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 De Rauw, Dominique Pattyn, Frank Barbier, Christian Orban, Anne CSL - Centre Spatial de Liège - ULiège 2020-07-10 https://orbi.uliege.be/handle/2268/251244 https://orbi.uliege.be/bitstream/2268/251244/1/09138726.pdf https://doi.org/10.1109/JSTARS.2020.3008497 en eng Institute of Electrical and Electronics Engineers https://ieeexplore.ieee.org/document/9138726/keywords#keywords urn:issn:1939-1404 urn:issn:2151-1535 https://orbi.uliege.be/handle/2268/251244 info:hdl:2268/251244 https://orbi.uliege.be/bitstream/2268/251244/1/09138726.pdf doi:10.1109/JSTARS.2020.3008497 scopus-id:2-s2.0-85089954797 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 13, 4085 - 4094 (2020-07-10) Ice Synthetic aperture radar Tides Antarctica interferometry 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 2020 ftorbi https://doi.org/10.1109/JSTARS.2020.3008497 2024-03-27T14:54:26Z peer reviewed 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. MIMO (Monitoring melt where Ice Meets Ocean) Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves University of Liège: ORBi (Open Repository and Bibliography) IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 13 4085 4094 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Ice Synthetic aperture radar Tides Antarctica interferometry Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Ice Synthetic aperture radar Tides Antarctica interferometry Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Glaude, Quentin Amory, Charles Berger, Sophie De Rauw, 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 |
Ice Synthetic aperture radar Tides Antarctica interferometry 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 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. MIMO (Monitoring melt where Ice Meets Ocean) |
author2 |
CSL - Centre Spatial de Liège - ULiège |
format |
Article in Journal/Newspaper |
author |
Glaude, Quentin Amory, Charles Berger, Sophie De Rauw, Dominique Pattyn, Frank Barbier, Christian Orban, Anne |
author_facet |
Glaude, Quentin Amory, Charles Berger, Sophie De Rauw, 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 |
publisher |
Institute of Electrical and Electronics Engineers |
publishDate |
2020 |
url |
https://orbi.uliege.be/handle/2268/251244 https://orbi.uliege.be/bitstream/2268/251244/1/09138726.pdf https://doi.org/10.1109/JSTARS.2020.3008497 |
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 |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 13, 4085 - 4094 (2020-07-10) |
op_relation |
https://ieeexplore.ieee.org/document/9138726/keywords#keywords urn:issn:1939-1404 urn:issn:2151-1535 https://orbi.uliege.be/handle/2268/251244 info:hdl:2268/251244 https://orbi.uliege.be/bitstream/2268/251244/1/09138726.pdf doi:10.1109/JSTARS.2020.3008497 scopus-id:2-s2.0-85089954797 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1109/JSTARS.2020.3008497 |
container_title |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
container_volume |
13 |
container_start_page |
4085 |
op_container_end_page |
4094 |
_version_ |
1796933855174721536 |