Анализ особенностей ледового режима юго-восточной части Tатарского пролива (Японское море)

Abstract

The article considers the features of the ice regime of the southeastern part of the Tatar Strait during the period of the standard climatic norm 1991–2020. The analysis of inter-seasonal and intra-seasonal variability of ice cover was carried out, the dates of the main ice phases were determined. Based on satellite observations and the developed software package, the analysis was performed and maps of the spatial distribution of the ice period in the southeastern part of the Tatar Strait were constructed. It is established that the northern subzone of the southeastern part of the Tatar Strait has more severe ice conditions, which are due to its geographical location and the peculiarities of the ice regime of the Tatar Strait. It is noted that the northern subzone in some years can be filled with ice by 100 %, while the maximum occupancy of the southern subzone does not exceed 24 %. At the same time, on average for the period of the standard climatic norm of 1991–2020. the stage of maximum development of ice processes in the northern subzone lasts on average about 23 days—from February 10 to March 5, and on the intra-seasonal variability curve, 2 seasonal ice maxima are clearly distinguished—February 10 and March 5. The absolute values of the intra-seasonal variability of the ice cover of the southern subzone are several times lower than in the northern one: the phase of intensive development here lasts from February 15 to February 28, the phase of destruction from early March to mid-March. On average, during the study period, the largest number of days with ice is observed on the coast from the village of Krasnogorsk to the village of Ilyinskoye, the duration of the period with ice from 20 to 35 days is typical for the segment of the coast from Cape Staromayachny to Cape Yablonovy.