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The climate changes represent an important problem in today's society. Our study refers to the West Region of Romania, formed by the counties of Arad, Timis, Caras-Severin, Hunedoara, and it shows that there are significant differences regarding the climate changes between these counties. In our paper, we analyze the evolution of annual, respectively seasonal precipitations, and of the minimal, maximal and medium air temperatures in the considered region in the time frame 1991-2021. The statistical analysis of data shows an increase of the medium annual air temperatures, the observed changes being more pronounced in summer and winter. Beside the increase tendency of the air temperature in winter, one could observe also that the time of heat waves has become significantly longer in the West of Romania, such that the number of hot days is larger. An increase of the maximum length of the periods without precipitation has been observed over the last decades in the west during summer, as well as monthly anomalies of temperatures and precipitations. Annual estimates of the Climate Altering Land Cover Index are presented for the analyzed period and we observe that there is a positive correlation between these indices and the mean air temperature. In conditions of the climate changes, the mean summer precipitations will reduce in the coming decades, which will affect the management of water resources and the agriculture, which leads to the necessity of adjustment to the climate changes. [ABSTRACT FROM AUTHOR]

This paper analyzes the changes of trends in temperature and precipitation in the Azov sea basin. The nature of this territory has undergone major changes. It is an important agricultural and industrial area. The paper considers changes in temperature and precipitation at stations located mainly in the steppe zone. Maximum, minimum, mean air temperature and precipitation trends on a seasonal and annual time scale are evaluated from data recorded at twelve weather stations in the basin of Azov sea during the period 1966–2015. Since the 70s of the twentieth century, there has been a monotonous increase in air temperature. The warmest years not only for Russia, but also for the Northern hemisphere and the globe as a whole were 2007, 2002, 2005 and 2004. Analysis of maximum air temperature values showed that the warmest years in the basin were 2010, 2007, and 2015. The minimum temperatures were recorded in 1987, 1976, 1992-1993 years. Over the past 15-20 years there have been significant changes in climate features. Annual and season changes are analyzed. It is established a steady warming trend. An increase in annual temperatures by 0.4-2.8 °C, January - by 2.6-3.1 °C and July - by 0.7- 2.1 °C. The study of air temperature by season showed that winter become warmer by 1.1 - 5.8 °C. The precipitation trend is less noticeable. In the winter and autumn periods there is an increase in the amount of precipitation. In the spring the amount of precipitation increases for all the stations under. In summer precipitation changes complicatedly. [ABSTRACT FROM AUTHOR]