Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR
We estimate active layer thickness (ALT) for part of northern Alaska’s permafrost zone for summer 2017 to 2022 using satellite data from Sentinel-1 and ICESat-2. Interferograms were inverted using a Short Baseline Subset (SBAS) approach to estimate the amplitude of seasonal subsidence. ALT was estim...
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2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070712 2024-01-21T09:58:29+01:00 Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR Sadeghi Chorsi, Taha Meyer, Franz J. Dixon, Timothy H. 2023-12 electronic https://doi.org/10.5194/egusphere-2023-2605 https://noa.gwlb.de/receive/cop_mods_00070712 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069048/egusphere-2023-2605.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/egusphere-2023-2605.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-2605 https://noa.gwlb.de/receive/cop_mods_00070712 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069048/egusphere-2023-2605.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/egusphere-2023-2605.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-2605 2023-12-25T00:22:42Z We estimate active layer thickness (ALT) for part of northern Alaska’s permafrost zone for summer 2017 to 2022 using satellite data from Sentinel-1 and ICESat-2. Interferograms were inverted using a Short Baseline Subset (SBAS) approach to estimate the amplitude of seasonal subsidence. ALT was estimated from the measured subsidence. ICESat-2 products were used to validate the InSAR displacement time-series. Most subsidence occurs between June and August in our study area. The maximum amplitude of seasonal subsidence was 2–6 cm, with ALT exceeding 1.5 m. Estimated ALT is in good agreement with in-situ and other remotely sensed data, but is sensitive to assumed thaw season onset, indicating the need for reliable surface temperature data. Our results suggest the feasibility of long-term permafrost monitoring with satellite InSAR. Article in Journal/Newspaper Active layer thickness permafrost Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Sadeghi Chorsi, Taha Meyer, Franz J. Dixon, Timothy H. Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR |
topic_facet |
article Verlagsveröffentlichung |
description |
We estimate active layer thickness (ALT) for part of northern Alaska’s permafrost zone for summer 2017 to 2022 using satellite data from Sentinel-1 and ICESat-2. Interferograms were inverted using a Short Baseline Subset (SBAS) approach to estimate the amplitude of seasonal subsidence. ALT was estimated from the measured subsidence. ICESat-2 products were used to validate the InSAR displacement time-series. Most subsidence occurs between June and August in our study area. The maximum amplitude of seasonal subsidence was 2–6 cm, with ALT exceeding 1.5 m. Estimated ALT is in good agreement with in-situ and other remotely sensed data, but is sensitive to assumed thaw season onset, indicating the need for reliable surface temperature data. Our results suggest the feasibility of long-term permafrost monitoring with satellite InSAR. |
format |
Article in Journal/Newspaper |
author |
Sadeghi Chorsi, Taha Meyer, Franz J. Dixon, Timothy H. |
author_facet |
Sadeghi Chorsi, Taha Meyer, Franz J. Dixon, Timothy H. |
author_sort |
Sadeghi Chorsi, Taha |
title |
Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR |
title_short |
Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR |
title_full |
Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR |
title_fullStr |
Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR |
title_full_unstemmed |
Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR |
title_sort |
toward long-term monitoring of regional permafrost thaw with satellite insar |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-2605 https://noa.gwlb.de/receive/cop_mods_00070712 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069048/egusphere-2023-2605.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/egusphere-2023-2605.pdf |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_relation |
https://doi.org/10.5194/egusphere-2023-2605 https://noa.gwlb.de/receive/cop_mods_00070712 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069048/egusphere-2023-2605.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/egusphere-2023-2605.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2605 |
_version_ |
1788693908851523584 |