Spatiotemporal distribution and meteorological characteriatics of hot dry winds in Ukraine at the end of XX ‒ beginning of XXI century

Authors: Slizhe M. O., Semenova I. G.

Year: 2017

Issue: 22

Pages: 21-29

Abstract

The hot dry winds in Ukraine are dangerous phenomenon, which can significantly impact to crop yields. This winds damages of crops, which active development occurs in the spring and summer time. Their impacts during the short time can reduce or destroy the future harvest.

The modern research of spatial and temporal distribution of the hot dry winds and its meteorological characteristics on the territory of Ukraine in the current changed climate is an actual problem, because this phenomenon occurs almost every growing season.

In the paper describes the features of spatiotemporal distribution of the hot dry winds over Ukraine from April to August for the period of 1995-2015. The results of the analysis of interannual variability and seasonal frequency of the dry hot wind with different duration are presented for the stations, located in different agro-climatic zones of Ukraine. The average monthly, medium-term values of temperature, relative humidity, wind speed during dry wind were analyzed.

The average monthly, medium-term values of temperature, relative humidity, and wind speed under dry wind were analyzed. The values for maximum temperature, minimum relative air humidity and maximum of hot dry winds speed at stations were selected. The average temperature during the formation of hot dry winds matter most in Steppe zone, with its maximum value in individual locations reached 40 °C.

The average relative humidity during the hot dry winds varies little during the growing season, the lowest values were recorded in spring in Polesie and forest-Steppe zone and in summer in Steppe zone.

In all agro-climatic zones of greatest average speed of hot dry winds is observed in April. The maximum speed of hot dry wind in some stations reached 18 m/s.

Also there were analyzed the directions of the hot dry winds. The hot dry winds directions is vary considerably in agro-climatic zones and months, but prevailing directions is identify directions of southern and eastern quadrant, corresponding to the southern and western periphery of anticyclones.

Tags: hot dry winds; temperature and humidity regime; wind regime; режим вітру; суховій; суховійний період; температурно-вологісний режим

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