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


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2016, Vol. 13, No. 5, pp. 121-130

Peculiarities of the temperature regime of Lake Baikal derived from AVHRR data

E.N. Sutyrina 1 
1 Irkutsk State University , Irkutsk, Russia
Accepted: 29.09.2016
DOI: 10.21046/2070-7401-2016-13-5-121-130
Water surface temperature is a significant characteristic of a lake ecosystem and one of the most important parameters indicating climate change. The purpose of the research was to study the features of temperature distribution at the surface of Lake Baikal during the ice-free period using AVHRR data from 1998 to 2015. Intra- and interannual variabilities of Lake Baikal surface temperature distribution were examined and it was found that the highest interannual variability was observed in August, in the period of maximum warming of the lake surface. The impact of the most significant factors on the formation of the maximum surface temperature values in the exposed parts of the Southern, Central and Northern basins of Lake Baikal was analyzed. It was shown that the connection of maximum water surface temperature in the exposed parts with near-surface air temperature averaged for the month preceding the observed water temperature maximum, was very close for in the Southern and Central basins, and close in the Northern basin. The connection of maximum water temperatures with time of final disappearance of all ice in the Northern and Southern basins was moderate and close, and in the Central basin, this connection was tenuous. Positive trends in maximum water surface temperatures in the exposed parts of all three basins of the lake with values of 0.2ºC to 0.7ºC per decade were revealed and compared with the trends in surface air temperatures and time of final disappearance of ice.
Keywords: Lake Baikal, AVHRR data, water surface temperature, intra and inter-annual variability.
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