ИСПОЛЬЗОВАНИЕ ДАННЫХ РЕАНАЛИЗА ДЛЯ ИССЛЕДОВАНИЯ ЛЕДЯНОГО ПОКРОВА АЗОВСКОГО МОРЯ

Abstract

The article presents an analysis of the results of the OSI-450 reanalysis as an alternative data source for the study of the ice cover of the Azov Sea. OSI-450 is the second major version of the OSI SAF Global Sea Ice Concentration Climate Data Record (CDR). The OSI-450 product is available for the period 1979 to 2015.Using licensed software ArcGIS 10.*, a model for data processing was created. The average long-term value of the ice cover for the period 2000–2015 according to the OSI-450 reanalysis data is 23.3 %, according to GIS data – 37.2 %; the maximum and minimum values are 43 % / 69.4 % and 8.2 % / 8 %, respectively. The correlation coefficient with the sum of average monthly air temperatures is minus 0.87 (air temperature for the winter season is a main factor that determines the ice conditions of the Sea of Azov). It is shown that the OSI-450 reanalysis data underestimate the ice extent for the season, but on the whole reproduces the long-term dynamics of the ice cover for the period under consideration. Based on the study, it was concluded that the OSI-450 reanalysis can act as an alternative source of data on the state of the ice cover, but taking into account correction factors.