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Incidence Angle Dependence and Evolution of Drifting Multi-year Sea Ice During the Onset of Freeze-up in the Marginal Ice Zone of the Western Beaufort Sea

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Title
Incidence Angle Dependence and Evolution of Drifting Multi-year Sea Ice During the Onset of Freeze-up in the Marginal Ice Zone of the Western Beaufort Sea
Other Titles
보퍼트해 MIZ 다년생 유빙 표면의 영상레이더 입사각효과 연구
Authors
Kim, Seung Hee
Kim, Hyun-cheol
Hyun, Chang-Uk
Lee, sungjae
Kim, Joo-Hong
Kim, Duk-Jin
Issue Date
2020
Citation
Kim, Seung Hee, et al. 2020. Incidence Angle Dependence and Evolution of Drifting Multi-year Sea Ice During the Onset of Freeze-up in the Marginal Ice Zone of the Western Beaufort Sea. AGU 2020 Fall Meeting. Online. 2020.12.01~2020.12.17.
Abstract
Backscattering coe cients of Sentinel-1 C-Band synthetic aperture radar (SAR) of drifting multi- year sea ice in the marginal region of the western Beaufort Sea are analyzed during the onset of freeze-up in 2019. The sea ice oe is tracked down using a GPS tracker, installed on the surface during a eld campaign in August 2019. A total of 24 Sentinel-1 EW images spanning 17 days are used and the incidence angle dependence in HH- and HV-polarization is analyzed in a 1 km by 1 km region centered at the tracker location. The dependences are -0.24 dB/deg and -10 dB/deg for HH- and HV-polarization, respectively. Hummocks and recently frozen melt ponds seem to caused the mixture behavior of surface and volume scattering. After removing the incidence angle dependencies, the backscattering coe cients in HH-polarization shows gradual increase in time at a rate of 0.15 dB/day, whereas the HV-polarization is relatively at. The air temperature from the ERA5 hourly reanalysis data solely has a strong negative relation with 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/201206/12268
Conference Name
AGU 2020 Fall Meeting
Conference Place
Online
Conference Date
2020.12.01~2020.12.17
Appears in Collections  
2020-2020, Development of Integrated Health Management System for Polar Operation Ships and Offshore Structures Based on Satellite Data (20-20) / Kim, Hyun-cheol (PN20030)
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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