Preprints
https://doi.org/10.5194/egusphere-2023-2605
https://doi.org/10.5194/egusphere-2023-2605
21 Dec 2023
 | 21 Dec 2023

Toward Long-Term Monitoring of Regional Permafrost Thaw with Satellite InSAR

Taha Sadeghi Chorsi, Franz J. Meyer, and Timothy H. Dixon

Abstract. 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.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Taha Sadeghi Chorsi, Franz J. Meyer, and Timothy H. Dixon

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-2605', Irena Hajnsek, 11 Mar 2024
  • CC2: 'Comment on egusphere-2023-2605', Vincent Boulanger-Martel, 14 Mar 2024
    • AC3: 'Reply on CC2', Taha Sadeghi Chorsi, 25 Apr 2024
  • CC3: 'Comment on egusphere-2023-2605', Roger Michaelides, 14 Mar 2024
    • AC4: 'Reply on CC3', Taha Sadeghi Chorsi, 25 Apr 2024
  • RC1: 'Comment on egusphere-2023-2605', Malte Vöge, 18 Mar 2024
    • AC1: 'Reply on RC1', Taha Sadeghi Chorsi, 25 Apr 2024
  • RC2: 'Comment on egusphere-2023-2605', Irena Hajnsek, 20 Mar 2024
    • AC2: 'Reply on RC2', Taha Sadeghi Chorsi, 25 Apr 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-2605', Irena Hajnsek, 11 Mar 2024
  • CC2: 'Comment on egusphere-2023-2605', Vincent Boulanger-Martel, 14 Mar 2024
    • AC3: 'Reply on CC2', Taha Sadeghi Chorsi, 25 Apr 2024
  • CC3: 'Comment on egusphere-2023-2605', Roger Michaelides, 14 Mar 2024
    • AC4: 'Reply on CC3', Taha Sadeghi Chorsi, 25 Apr 2024
  • RC1: 'Comment on egusphere-2023-2605', Malte Vöge, 18 Mar 2024
    • AC1: 'Reply on RC1', Taha Sadeghi Chorsi, 25 Apr 2024
  • RC2: 'Comment on egusphere-2023-2605', Irena Hajnsek, 20 Mar 2024
    • AC2: 'Reply on RC2', Taha Sadeghi Chorsi, 25 Apr 2024
Taha Sadeghi Chorsi, Franz J. Meyer, and Timothy H. Dixon
Taha Sadeghi Chorsi, Franz J. Meyer, and Timothy H. Dixon

Viewed

Total article views: 587 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
418 126 43 587 44 23 24
  • HTML: 418
  • PDF: 126
  • XML: 43
  • Total: 587
  • Supplement: 44
  • BibTeX: 23
  • EndNote: 24
Views and downloads (calculated since 21 Dec 2023)
Cumulative views and downloads (calculated since 21 Dec 2023)

Viewed (geographical distribution)

Total article views: 598 (including HTML, PDF, and XML) Thereof 598 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 24 Jul 2024
Download
Short summary
Active layer, the soil or sediment layer above permafrost, thaws and freezes seasonally. The annual freeze-thaw cycle of the active layer causes significant surface height change. We estimate subsidence rate and active layer thickness (ALT) for part of northern Alaska’s permafrost zone for summer 2017 to 2022 using satellite radar interferometry and LiDAR. ALT estimates range from ~20 cm to larger than 150 cm. Subsidence rate varies ranging from ~3–20 cm/year during the thaw season.