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...
Main Authors: | , , |
---|---|
Format: | Text |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/egusphere-2023-2605 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/ |
id |
ftcopernicus:oai:publications.copernicus.org:egusphere115832 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:egusphere115832 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. 2023-12-21 application/pdf https://doi.org/10.5194/egusphere-2023-2605 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/ eng eng doi:10.5194/egusphere-2023-2605 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/ eISSN: Text 2023 ftcopernicus https://doi.org/10.5194/egusphere-2023-2605 2023-12-25T17:24:15Z 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. Text Active layer thickness permafrost Copernicus Publications: E-Journals |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
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 |
Text |
author |
Sadeghi Chorsi, Taha Meyer, Franz J. Dixon, Timothy H. |
spellingShingle |
Sadeghi Chorsi, Taha Meyer, Franz J. Dixon, Timothy H. Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR |
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 |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-2605 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/ |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-2605 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2605/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-2605 |
_version_ |
1788693861764169728 |