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Evolution of Backscattering Coefficients of Drifting Multi-Year Sea Ice during End of Melting and Onset of Freeze-up in the Western Beaufort Sea

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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
Other Titles
보퍼트해 다년빙의 결빙시기 영상레이더 후방산란계수 시계열 변화 분석
Authors
Kim, Seung Hee
Kim, Hyun-cheol
Hyun, Chang-Uk
Lee, sungjae
Ha, Jung-Seok
Kim, Joo-Hong
Kwon, Young-Joo
Park, Jeong-Won
Jeong-Won, Hyangsun
Jeong, Seong-Yeob
Kim, Duk-jin
Subject
Environmental Sciences & Ecology; Geology; Remote Sensing; Imaging Science & Photographic Technology
Keywords
sea ice; synthetic aperture radar; multi-year; arctic; Beaufort Sea; backscattering coe cient; incidence angle
Issue Date
2020-05
Citation
Kim, Seung Hee, et al. 2020. "Evolution of Backscattering Coefficients of Drifting Multi-Year Sea Ice during End of Melting and Onset of Freeze-up in the Western Beaufort Sea". REMOTE SENSING, 12(9): 1378-1392.
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.
URI
https://repository.kopri.re.kr/handle/201206/11971
DOI
http://dx.doi.org/10.3390/rs12091378
Appears in Collections  
2020-2020, Study on remote sensing for quantitative analysis of changes in the Arctic cryosphere (20-20) / Kim, Hyun-cheol (PE20080)
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