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


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 4, pp. 149-154

Some features of L-band thermal radiation of freshwater bodies with ice cover

I.V. Khvostov 1 , A.N. Romanov 1 , V.V. Tikhonov 2, 3 , E.A. Sharkov 2 
1 Institute for Water and Environmental Problems SB RAS, Barnaul, Russia
2 Space Research Institute RAS, Moscow, Russia
3 Moscow Institute of Physics and Technology (State University), Moscow, Russia
Accepted: 25.05.2017
DOI: 10.21046/2070-7401-2017-14-4-149-154
By the examples of the lakes Baikal, Ladoga (Russia) and Huron (USA-Canada), temporal variations of brightness temperature of large freshwater lakes were explored based on satellite microwave radiometry data. Three characteristic brightness temperature regions were revealed. The first area is associated with ice-free water surface, the second with stable ice cover on the surface. In the third region, typical of the period of ice melting, a short-term sharp increase in brightness temperature by 40–90 K was noted. This effect is associated with the change in physical properties of ice during destruction and melting, causing an increase in brightness temperature of the ice cover and screening of microwave radiation coming from the water surface. The conclusions are confirmed by model calculations. The detected effect allows predicting the spring change in the ice situation of large freshwater areas based on satellite data.
Keywords: microwave radiation, freshwater lakes, SMOS mission
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