The average temperature assessment of the surface layer of the Sea of Azov based on satellite imagery and observations at coastal hydrometeorological stations

https://doi.org/10.35595/2414-9179-2019-2-25-112-120

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About the Authors

Lyudmila V. Dashkevich

Federal Research Center the Southern Scientific Centre of the Russian Academy of Sciences,
Chekhov avenue, 41, 344006, Rostov-on-Don, Russia,
E-mail: ldashkev@ssc-ras.ru

Valerii V. Kulygin

Federal Research Center the Southern Scientific Centre of the Russian Academy of Sciences,
Chekhov avenue, 41, 344006, Rostov-on-Don, Russia,
E-mail: kulygin@ssc-ras.ru

Abstract

The assessment of the average annual sea temperature of the Sea of Azov are considered. A brief history of the study of this parameter based on the materials of various authors is presented.

A comparison of the average sea temperature assessment obtained from observations at hydrometeorological stations and from the satellite imagery was made. Sea surface temperature maps are based on AVHRR radiometers data (NOAA satellites, processing level L4). The period 1982–2015 was considered. The good agreement of the assessments obtained from two independent sources was shown.

According to the results of a comparative analysis, the optimal variants of averaging the data of sea temperature observations of the Sea of Azov to obtain climatically significant characteristics are proposed. The agreement between the assessments of the average annual sea temperature with using satellite information and observational data at hydrometeorological stations suggests the adequacy of using the averaging method of coastal observations to estimate the Sea of Azov annual temperature and the possibility of using it in retrospective studies of climate change in the region.

In the long-term dynamics of changes in the sea temperature of the Sea of Azov according to the data of remote sensing of the Earth, as well as according to the information of hydrometeorological stations, there is a tendency of its growth since the mid-1990s, somewhat slowed down after the warmest year 2010. The warming of the waters of the Sea of Azov at the beginning of the twenty-first century relative to the end of the twentieth century by almost a degree Celsius, more pronounced in the open part of the sea, is detected.

Keywords

Sea of Azov, average annual sea temperature, satellite imagery.

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For citation: Dashkevich L.V., Kulygin V.V. The average temperature assessment of the surface layer of the Sea of Azov based on satellite imagery and observations at coastal hydrometeorological stations InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: Moscow University Press, 2019. V. 25. Part 2. P. 112–120. DOI: 10.35595/2414-9179-2019-2-25-112-120 (In Russian)