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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2023, Vol. 20, No. 5, pp. 219-231

Variability of Arctic sea ice and sea water microwave emissivities

M.A. Zhivotovskaia 1 , E.V. Zabolotskikh 1 , S.M. Azarov 1 
1 Russian State Hydrometeorological University, Saint Petersburg, Russia
Accepted: 14.08.2023
DOI: 10.21046/2070-7401-2023-20-5-219-231
In the paper, we analyze sea ice and sea water emissivities at frequencies 6.9; 10.65; 18.7; 23.8; 36.5 and 89 GHz in vertical and horizontal polarizations in the Arctic seas. The radiation coefficients were calculated for the period from January 1 to December 31, 2020, using average daily measurements of AMSR2 (Advanced Microwave Scanning Radiometer) and were based on the transport equation in the approximation of a non-scattering atmosphere using ERA5 reanalysis data for surface temperature and profiles of atmospheric meteorological parameters. To separate sea ice from sea water, satellite sea ice concentration product of the University of Bremen was used. The results of this paper indicate a significantly greater variability of sea emissivity than described in the literature. The variability of the emissivity of the Arctic sea ice increases with frequency and at frequency of 89 GHz is twice as high as at frequencies of 18.7; 23.8; 36.5 GHz.
Keywords: sea ice, Arctic, satellite microwave measurements, microwave radiometers
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