D. Nikolov, C. Dimitrov, L. Bocheva
Thursday 11 October 2018 by Libadmin2018


Snow blizzards and snow drifts have recently proven as major winter threat for the road traffic, communications and social life in northeast Bulgaria. The geographical location of these regions with respect to the tracks of the winter Mediterranean cyclones and cold advections from north and northeast makes them indeed prone to this risk, but one would like to know if there is a significant rise in their number and severity.
The main goal of the current study is exactly the investigation of the contemporary tendencies in the regime of the characteristics of the snow cover in northeast Bulgaria. This includes examination and assessment of the following climatic characteristics of the snow cover and their tendencies: mean, maximal, mean maximal snow cover depth, mean monthly and seasonal number of days with snow cover greater than specific height (15 и 30 cm) and the character of the snow cover, i.e. the presence of snow drifts. These climatic characteristics have been assessed for a period of more than 50 years (1962-2015) using 36 station in the following administrative districts: Targovishte, Shumen, Silistra, Razgrad, Dobrich and Varna. Spatial attention is paid to the recent snow blizzards cases where the wind conditions have been investigated also. This has been done for the period 1991-2015.

Keywords: snow blizzard, snow drifts, snow cover variability, climate change

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