Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2012, Vol. 9, No. 2, pp. 262-269
Long-term variability of the Caspian Sea surface temperature
(1982-2009)
A.I. Ginzburg
, A.G. Kostianoy
, N.A. Sheremet
P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, 36, Nakhimovsky Pr., Moscow, 117997, Russia
A study of interannual and seasonal variability of sea surface temperature (SST) averaged over three regions of the Caspian Sea individually (the Northern, Middle, and Southern Caspian) during 1982-2009 was carried out on the base of satellite dataset of Pathfinder project (quality 5, weekly values of temperature with spatial resolution of 4 km) (for the shallow and freezing in winter Northern Caspian, the study was limited to the warm period April-September). Warming of the Caspian Sea in all seasons in the period under consideration was established, with the trends of annual mean SST values of about 0.06 and 0.05 ºC/year in the Middle and Southern Caspian, respectively, under decreasing temperature in 2005-2009 on the background of the warming on average. Interannual variability of SST and its winter anomalies in the main features are consistent with the variability of air temperature at 2 m (Giovanni online data system). A comparison of the annual mean and seasonal SST values calculated with the MCSST- and Pathfinder project satellite data sets during the 1982-2000 years showed their possible differences, especially in winter, associated with the gaps in satellite measurements and the difference in interpolation algorithms used in the formation of these data sets.
Keywords: the satellite data service, the sea surface, oceanic processes, radar data, remote sensing in the IR and visual bands
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