ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2019, Vol. 16, No. 5, pp. 255-267

Radar, thermal and optical contrasts of sea ice in the Sea of Okhotsk during winter

L.M. Mitnik 1 , E.S. Khazanova 1 
1 V.I. Il'ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
Accepted: 26.07.2019
DOI: 10.21046/2070-7401-2019-16-5-255-267
The paper presents the results of ice cover sensing on the shelf and in the Terpeniya Bay in the Sea of Okhotsk by Sentinel-1A/B synthetic aperture radar (SAR) and Landsat-8 spectral instruments in the visible and IR wavelengths with the spatial resolution of 30–100 m. A detailed study was carried out for the sea ice images and open sea surface acquired on January 7–8, 2017 under clear sky and at low air surface temperature. When analyzing the weather conditions and ice cover characteristics, the Terra MODIS images, AMSR2-retrieved sea ice concentration maps, scatterometer-derived sea surface wind fields, and weather station reports were used. Estimates of the absolute values and spatial variability of the normalized radar cross section, spectral reflectance and radiation temperature of various types of sea ice and sea surface were obtained. The features of sea ice formation and the structure of the marginal ice zone under strong wind and differences in the assessment of the thin ice concentration according to passive MW sensing data, SAR, visible and IR images are noted. The advantages of sharing remote sensing data when analyzing the characteristics of sea ice are shown. The need to install the SAR on Russian satellites to obtain operational and scientific data on the ice condition in the Arctic region is underlined.
Keywords: remote sensing, sea ice, SAR, Sentinel-1A/B, NRCS, Landsat-8, spectral reflectance, brightness temperature, Sea of Okhotsk
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