HEAVY SHOWERS IN UKRAINE AT THE TURN OF THE 20TH AND 21TH CENTURIES

Tatarchuk O., Tymofeyev V.

Ukrainian Hydrometeorological Institute, Kyiv, Ukraine

Abstract:

Long-term dynamics and spatial and temporal distribution of heavy showers in Ukraine are investigated in conditions of global warming. Heavy showers often fall between May and August, their maximum observed in the summer months (July). However in recent years, heavy rain began to observe in April, September and October. In the 2001-2010s frequency of heavy showers has more than doubled over the previous decade. Most cases of heavy rains at all time periods observed in the Crimea peninsula and Odessa region. The lowest number of showers for the period 1986-2015 is registered in Rivne and Lugansk regions.

The analysis of atmospheric circulation conditions that cause heavy rains is carried out. Most cases of heavy rains in summer associated with isolated upper-tropospheric cyclones (cut-off lows) that generally sedentary and make long-term impact on the study area, mainly in the first half of summer. In late summer, heavy showers associated with synoptic processes in interaction with the quasi-stationary ridge over Eastern Europe.

Keywords:

climate change, extreme weather events, heavy showers, atmospheric circulation.

Language:

ukrainian

DOI: http://doi.org/10.17721/1728-2721.2017.66.13

References:

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Suggested citation:

Tatarchuk O., Tymofeyev V. (2017) Heavy showers in Ukraine at the turn of the 20th and 21th centuries. Visnyk Kyivskogo natsionalnogo universytetu, Geografiya [Bulletin of Taras Shevchenko National University of Kyiv, Geography], 1-2 (66-67), 89-93 (in Ukrainian, abstr. in English).