Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR
In this study, elevation change and surface morphology of CookE2, one of the most active subglacial lakes in East Antarctica, were analyzed by using Differential Interferometric Synthetic Aperture Radar (DInSAR) and a newly adapted Time-Segmented Persistent Scatterer Interferometric Synthetic Apertu...
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ftmdpi:oai:mdpi.com:/2072-4292/14/18/4616/ 2023-08-20T04:01:14+02:00 Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR Jihyun Moon Hoseung Lee Hoonyol Lee agris 2022-09-15 application/pdf https://doi.org/10.3390/rs14184616 EN eng Multidisciplinary Digital Publishing Institute Environmental Remote Sensing https://dx.doi.org/10.3390/rs14184616 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 14; Issue 18; Pages: 4616 active subglacial lake CookE2 DInSAR PSInSAR TS-PSInSAR Text 2022 ftmdpi https://doi.org/10.3390/rs14184616 2023-08-01T06:29:26Z In this study, elevation change and surface morphology of CookE2, one of the most active subglacial lakes in East Antarctica, were analyzed by using Differential Interferometric Synthetic Aperture Radar (DInSAR) and a newly adapted Time-Segmented Persistent Scatterer Interferometric Synthetic Aperture Radar (TS-PSInSAR) techniques. Firstly, several DInSAR pairs were used to study the surface morphology of the subglacial lake during the rapid discharge event in 2007 and the subsequent recharge in 2010 by using ALOS PALSAR data and the continuous recharge from 2018 to 2020 by using Sentinel-1 SAR data. For time-series observation from 2018 to 2020, however, simple integration of DInSAR deviates largely from the satellite altimeter data because errors from the horizontal flow of the surrounding ice field or atmospheric phase accumulate. Conventional PSInSAR deviates from the altimeter data if the LOS displacement exceeds 300 mm, i.e., approximately 1/4 of the slant range resolution of the Sentinel-1 SAR in Interferometric Wide-swath (IW) mode, during the time window. Therefore, a series of Time-Segmented PSInSAR with a 4-month time window could accurately distinguish 1.10 ± 0.01 m/year of highly linear (R2 = 0.99) surface rise rate of CookE2 and 0.63 m/year of horizontal deformation rate of the surrounding ice field from 2018 to 2020. Text Antarc* Antarctica East Antarctica MDPI Open Access Publishing East Antarctica The Sentinel ENVELOPE(73.317,73.317,-52.983,-52.983) Remote Sensing 14 18 4616 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
active subglacial lake CookE2 DInSAR PSInSAR TS-PSInSAR |
spellingShingle |
active subglacial lake CookE2 DInSAR PSInSAR TS-PSInSAR Jihyun Moon Hoseung Lee Hoonyol Lee Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR |
topic_facet |
active subglacial lake CookE2 DInSAR PSInSAR TS-PSInSAR |
description |
In this study, elevation change and surface morphology of CookE2, one of the most active subglacial lakes in East Antarctica, were analyzed by using Differential Interferometric Synthetic Aperture Radar (DInSAR) and a newly adapted Time-Segmented Persistent Scatterer Interferometric Synthetic Aperture Radar (TS-PSInSAR) techniques. Firstly, several DInSAR pairs were used to study the surface morphology of the subglacial lake during the rapid discharge event in 2007 and the subsequent recharge in 2010 by using ALOS PALSAR data and the continuous recharge from 2018 to 2020 by using Sentinel-1 SAR data. For time-series observation from 2018 to 2020, however, simple integration of DInSAR deviates largely from the satellite altimeter data because errors from the horizontal flow of the surrounding ice field or atmospheric phase accumulate. Conventional PSInSAR deviates from the altimeter data if the LOS displacement exceeds 300 mm, i.e., approximately 1/4 of the slant range resolution of the Sentinel-1 SAR in Interferometric Wide-swath (IW) mode, during the time window. Therefore, a series of Time-Segmented PSInSAR with a 4-month time window could accurately distinguish 1.10 ± 0.01 m/year of highly linear (R2 = 0.99) surface rise rate of CookE2 and 0.63 m/year of horizontal deformation rate of the surrounding ice field from 2018 to 2020. |
format |
Text |
author |
Jihyun Moon Hoseung Lee Hoonyol Lee |
author_facet |
Jihyun Moon Hoseung Lee Hoonyol Lee |
author_sort |
Jihyun Moon |
title |
Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR |
title_short |
Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR |
title_full |
Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR |
title_fullStr |
Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR |
title_full_unstemmed |
Elevation Change of CookE2 Subglacial Lake in East Antarctica Observed by DInSAR and Time-Segmented PSInSAR |
title_sort |
elevation change of cooke2 subglacial lake in east antarctica observed by dinsar and time-segmented psinsar |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/rs14184616 |
op_coverage |
agris |
long_lat |
ENVELOPE(73.317,73.317,-52.983,-52.983) |
geographic |
East Antarctica The Sentinel |
geographic_facet |
East Antarctica The Sentinel |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
Remote Sensing; Volume 14; Issue 18; Pages: 4616 |
op_relation |
Environmental Remote Sensing https://dx.doi.org/10.3390/rs14184616 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs14184616 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
18 |
container_start_page |
4616 |
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1774723665185734656 |