| Popis: |
The paper presents the results of the analysis of changes in the atmospheric precipitation regime in various climatic zones of the southern Russia. The results of the study are based on a regression analysis of precipitation series based on instrumental observations of twenty meteorological stations in southern Russia in the period from 1961 to 2018. To study the precipitation regime, a “basic triad” was used: the sum precipitation, the daily maximum precipitation and the number of days with precipitation of at least 20 mm (NR20). It was found that over the past 60 years in the south of Russia in all climatic zones there has been both an increase (from 70% to 85% of the number of weather stations) and a decrease (from 30% to 15% of the number of weather stations) of seasonal precipitation , daily maximum precipitation and the number of days with precipitation of at least 20 mm. Basically, these trends are statistically insignificant. Of all the changes in seasonal precipitation, there are tendencies of a statistically significant increase in precipitation amounts at a rate of 5.6 mm / month/yrs, daily maximums by 1.0 mm/month/yrs and NR20 by 0.2 days/month/yrs in the autumn season, which are confirmed by the criteria stability and statistical significance at the 5% level (Fisher's test). |
