We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Evolution of Backscattering Coefficients of Drifting Multi-Year Sea Ice during End of Melting and Onset of Freeze-up in the Western Beaufort Sea.
- Authors
Kim, Seung Hee; Kim, Hyun-Cheol; Hyun, Chang-Uk; Lee, Sungjae; Ha, Jung-Seok; Kim, Joo-Hong; Kwon, Young-Joo; Park, Jeong-Won; Han, Hyangsun; Jeong, Seong-Yeob; Kim, Duk-jin
- Abstract
Backscattering coefficients of Sentinel-1 synthetic aperture radar (SAR) data of drifting multi-year sea ice in the western Beaufort Sea during the transition period between the end of melting and onset of freeze-up are analyzed, in terms of the incidence angle dependence and temporal variation. The mobile sea ice surface is tracked down in a 1 km by 1 km region centered at a GPS tracker, which was installed during a field campaign in August 2019. A total of 24 Sentinel-1 images spanning 17 days are used and the incidence angle dependence in HH- and HV-polarization are −0.24 dB/deg and −0.10 dB/deg, respectively. Hummocks and recently frozen melt ponds seem to cause the mixture behavior of surface and volume scattering. The normalized backscattering coefficients in HH polarization gradually increased in time at a rate of 0.15 dB/day, whereas the HV-polarization was relatively flat. The air temperature from the ERA5 hourly reanalysis data has a strong negative relation with the increasing trend of the normalized backscattering coefficients in HH-polarization. The result of this study is expected to complement other previous studies which focused on winter or summer seasons in other regions of the Arctic Ocean.
- Subjects
SENTINEL-1 (Artificial satellite); BACKSCATTERING; SEA ice drift; SYNTHETIC aperture radar; SURFACE scattering; SUMMER
- Publication
Remote Sensing, 2020, Vol 12, Issue 9, p1378
- ISSN
2072-4292
- Publication type
Letter
- DOI
10.3390/rs12091378