Comparative analysis of frequency of dry winds occurrence in Ukraine in the mid-20th century and at the beginning of the 21st century
Journal Title: Український гідрометеорологічний журнал - Year 2018, Vol 22, Issue 22
Abstract
Dry winds in Ukraine present a dangerous phenomenon which can significantly impact on crop yields. The winds damage agricultural crops active development of which occurs in spring and summer time. Their impact can in a short time reduce or destroy further yield. Study of spatial and temporal distribution of the dry winds, their meteorological characteristics, dynamics of their development and circulation processes resulting in their formation in Ukraine is a very urgent problem because almost every year the dry winds and droughts occur at the time of vegetation period. The current research of spatial and temporal distribution of the dry winds and its meteorological characteristics on the territory of Ukraine under the conditions of changed climate is an urgent problem because this phenomenon occurs over almost every vegetation period. The paper describes the results of comparative analysis of average number of days witnessing the dry winds at 14 meteorological stations in Ukraine located in different agro-climatic zones for the periods of 1936-1964 and 1995-2015. The number of dry winds significantly increased at most of such stations located in different parts of Ukraine. Same as over previous periods, the greatest repetition of days with the dry winds occurred in the south and the south-east of the country where, according to the data from some meteostations, vegetation period may, on average, consist of up to 27 days when dry winds blow. The reason for such increase is explained, firstly, by change of the large-scale atmospheric circulation resulting in weakening of the heat and moisture inter-latitude exchange which in its turn causes change of the temperature and humidity regime in Ukraine and, secondly, by increase of frequency of synoptic processes accompanied by formation of arid phenomena on the territory of the country. These changes could be traced when observing the positive anomalies of average air temperature during recent decades. The negative anomalies of precipitation and change in their distribution contribute to the formation of conditions that increase frequency and intensity of droughts. The obtained results indicate that changes of the regional climate contributed to the increase of frequency and prevalence of the dry winds in Ukraine.
Authors and Affiliations
M. O. Slizhe
Keywords
Related Articles
- EP ID EP528805
- DOI 10.31481/uhmj.22.2018.06
- Views 45
- Downloads 0
Assessment of changes of agro-climatic conditions for cultivation of millet in the southern regions of Ukraine resulted from climate change
The signals of global warming are now being observed throughout the world. Data of hydrometeorological centres show a significant increase of temperature in many regions accompanied by intense frequency of dry periods. S...
Results of the numerical modelling of intra-annual variability of hydrological characteristics of the Kuialnytskyi Lyman lagoon under various runoff volumes of the Velykyi Kuialnyk River
Assessments of changes in the intra-annual spatio-temporal variability of the hydrological characteristics of the Kuialnytskyi Lyman lagoon under various runoff volumes of the Velykyi Kuialnyk River were obtained from th...
On the state and prospects of higher hydrometeorological education in Ukraine: lessons and sugestions
The article analyzes the changes that took place in the higher school of Ukraine over the past 25 years in terms of their impact on the system of training specialists with higher education in hydrometeorological specialt...
Technologies of making meteorological weather forecasts implemented in the Hydrometeorological Department of the Respublic of Belarus
The article describes the methods of making short-term weather forecasts and storm warnings in the Hydrometeorological Department of the Republic of Belarus using different sources of information (monitoring of synoptic...
Advantages of using the Harmonie atmospheric mesoscale model for simulating water dynamics in offshore area
The convection-permitting Harmonie model is considered as a modeling component of the atmosphere-sea system. The role of the atmospheric model in the system is to create upper boundary conditions for marine environment m...