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- Title
3D SAR Speckle Offset Tracking Potential for Monitoring Landfast Ice Growth and Displacement.
- Authors
Choe, Byung-Hun; Samsonov, Sergey; Jung, Jungkyo
- Abstract
This study investigates the growth and displacement of landfast ice along the shoreline of the Mackenzie Delta in Northwest Territories, Canada, by synthetic aperture radar (SAR) speckle offset tracking (SPO). Three-dimensional (3D) offsets were reconstructed from Sentinel-1 ascending and descending SAR images acquired on the same dates during the November 2017–April 2018 and October 2018–May 2019 annual cycles. The analysis revealed both horizontal and vertical offsets. The annual horizontal offsets of up to ~8 m are interpreted as landfast ice displacements caused by wind and ocean currents. The annual vertical offsets of approximately −1 to −2 m were observed from landfast ice, which are likely due to longer radar penetration up to the ice–water interface with increasing landfast ice thickness. Numerical ice thickness model estimates supported the conclusion that the cumulative vertical negative offsets correspond to the growth of freshwater ice. Time-series analysis showed that the significant growth and displacement of landfast ice in the Mackenzie Delta occurred between November and January during the 2017–2018 and 2018–2019 cycles.
- Subjects
NORTHWEST Territories; SENTINEL-1 (Artificial satellite); SPECKLE interference; SYNTHETIC aperture radar; OCEAN currents; TIME series analysis
- Publication
Remote Sensing, 2021, Vol 13, Issue 11, p2168
- ISSN
2072-4292
- Publication type
Article
- DOI
10.3390/rs13112168