ПРОСТОРОВО-ЧАСОВЕ РОЗПОВСЮДЖЕННЯ ВИПАДКІВ МАСОВОГО РОЗПОВСЮДЖЕННЯ СКЛАДНИХ ОЖЕЛЕДО-ПАМОРОЗЕВИХ ВІДКЛАДІВ НА ТЕРИТОРІЇ УКРАЇНИ ПРОТЯГОМ 1991-2020 РР.

Abstract

The article is devoted to the study of the spatio-temporal distribution of cases of mass deposition of complex ice-frost deposits on the territory of Ukraine during the period 1991-2020. The case of mass deposition of complex sediments was considered to be the case when such deposits were observed on at least 10 stations and in at least two regions on one date. The study was conducted for each cold month and individual months of transitional seasons, as well as decades of the studied period separately. The aim of the study was to establish the spatio-temporal features of the mass distribution of cases of complex ice-frost deposits on the territory of Ukraine and to identify the territories under their influence. It has been proven that cases of mass spreading of complex ice-frost deposits are observed during the winter months of January and December. Research has established that: During the studied period (1991-2020), a number of cases of mass spread of complex ice-frost deposits on the territory of Ukraine were established: 3 cases during 1991-2000, 2 cases in 2001-2010, and 6 in 2011-2020. The cases in December 2000, 2010, and 2016, as well as in January 2004, are the most significant in terms of spatial coverage of the territory. Cases of mass spreading of complex ice-frost deposits mostly covered the territories of the central, north-eastern, eastern and southern regions. In the western region, they were mostly observed on the territory of the Carpathian regions and less often in Zakarpattia. With the mass distribution of complex ice-frost deposits during the studied time period, such deposits were most often observed at meteorological stations in the Kirovohrad, Poltava, Donetsk, Odesa regions and the Autonomous Republic of Crimea. It has been proven that the largest contribution (11.8%) to the mass spread of complex ice-frost deposits in December 1991-2000 compared to other regions (5.9%) was made by Luhansk, Donetsk, Kherson regions and the Autonomous Republic of Crimea. In January 2011-2020, Kharkiv and Kirovohrad regions had the largest contribution (14.3%) against 7.1% of other regions. In December 2011-2020, the largest contribution was made by Kirovohrad and Dnipropetrovsk regions (12.5% each), Donetsk (9.4%), as well as Poltava, Kharkiv, Cherkasy, Odesa, and Zaporizhia regions (6.3% each)