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 direct e...
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ftdoajarticles:oai:doaj.org/article:885ba760583b4eca9c964f061ad598f4 2023-05-15T13:57:15+02:00 Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model Quentin Glaude Charles Amory Sophie Berger Dominique Derauw Frank Pattyn Christian Barbier Anne Orban 2020-01-01T00:00:00Z https://doi.org/10.1109/JSTARS.2020.3008497 https://doaj.org/article/885ba760583b4eca9c964f061ad598f4 EN eng IEEE https://ieeexplore.ieee.org/document/9138726/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2020.3008497 https://doaj.org/article/885ba760583b4eca9c964f061ad598f4 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 13, Pp 4085-4094 (2020) Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 article 2020 ftdoajarticles https://doi.org/10.1109/JSTARS.2020.3008497 2022-12-31T11:24:36Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Ice Shelves Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic East Antarctica Dronning Maud Land Roi Baudouin ENVELOPE(24.461,24.461,-70.438,-70.438) IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 13 4085 4094 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Quentin Glaude Charles Amory Sophie Berger Dominique Derauw Frank Pattyn Christian Barbier Anne Orban Empirical Removal of Tides and Inverse Barometer Effect on DInSAR From Double DInSAR and a Regional Climate Model |
topic_facet |
Antarctica differential synthetic aperture radar (SAR) interferometry (DInSAR) double DInSAR (DDInSAR) ice shelf inverse barometer effect (IBE) tides Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
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. |
format |
Article in Journal/Newspaper |
author |
Quentin Glaude Charles Amory Sophie Berger Dominique Derauw Frank Pattyn Christian Barbier Anne Orban |
author_facet |
Quentin Glaude Charles Amory Sophie Berger Dominique Derauw Frank Pattyn Christian Barbier Anne Orban |
author_sort |
Quentin Glaude |
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 |
IEEE |
publishDate |
2020 |
url |
https://doi.org/10.1109/JSTARS.2020.3008497 https://doaj.org/article/885ba760583b4eca9c964f061ad598f4 |
long_lat |
ENVELOPE(24.461,24.461,-70.438,-70.438) |
geographic |
Antarctic The Antarctic East Antarctica Dronning Maud Land Roi Baudouin |
geographic_facet |
Antarctic The Antarctic East Antarctica Dronning Maud Land Roi Baudouin |
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, Vol 13, Pp 4085-4094 (2020) |
op_relation |
https://ieeexplore.ieee.org/document/9138726/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2020.3008497 https://doaj.org/article/885ba760583b4eca9c964f061ad598f4 |
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_ |
1766264847099494400 |