Preprints
https://doi.org/10.5194/tc-2021-18
https://doi.org/10.5194/tc-2021-18

  03 Feb 2021

03 Feb 2021

Review status: this discussion paper is a preprint. It has been under review for the journal The Cryosphere (TC). The manuscript was not accepted for further review after discussion.

InSAR monitoring of Arctic land fast sea ice deformation using L-band ALOS-2, C-band Radarsat-2 and Sentinel-1

Zhaohua Chen, Benoit Montpetit, Sarah Banks, Lori White, Amir Behnamian, Jason Duffe, and Jon Pasher Zhaohua Chen et al.
  • Science and Technology Branch, Environment and Climate Change Canada, Ottawa, Ontario, K1S 5B6, Canada

Abstract. Arctic amplification is accelerating changes in sea ice regimes in the Canadian Arctic with later freeze-up and earlier melt events, adversely affecting Arctic wildlife and communities that depend on the stability of the sea ice conditions. To monitor both the rate and impact of such change, there is a need to accurately measure sea ice deformation, an important component for understanding ice motion and polar climate. This paper presents Interferometric Synthetic Aperture Radar (InSAR) monitoring of Arctic landfast sea ice deformation as a result of thickness changes measured from ice draft and surface height using C-band Radarsat-2, Sentinel-1 and L-band ALOS-2. The small baseline subset (SBAS) approach was explored to process time series observations for retrieval of temporal deformation changes over the winter. Sea ice deformation (subsidence and uplift in the range of −32–57 cm) detected from satellite SAR data in Cambridge Bay, Nunavut, Canada during the winter of 2018–2019 was found to be in a range of values corresponding to the ice draft growth (30–62 cm) measured from an in-situ ice profiler. The trends of InSAR observations from Sentinel-1 were also consistent with ice surface height changes along two ground tracks detected from ICESat-2. SAR backscatter from Sentinel-1 also corresponded to the surface height with strong correlation coefficient (0.49–0.83). High coherence over ice from C-band was maintained over a shorter acquisition interval than L-band due to temporal decorrelation.

Zhaohua Chen et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2021-18', Anonymous Referee #1, 23 Feb 2021
  • RC2: 'Comment on tc-2021-18', Anonymous Referee #2, 01 Mar 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2021-18', Anonymous Referee #1, 23 Feb 2021
  • RC2: 'Comment on tc-2021-18', Anonymous Referee #2, 01 Mar 2021

Zhaohua Chen et al.

Zhaohua Chen et al.

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