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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]

Last year (2017) was one of the three hottest years on record, with many high-impact events including catastrophic hurricanes and floods, debilitating heat waves and drought. Long-term indicators of climate change continue unabated and arctic sea ice coverage remained below average. Of the hottest years on record, 15 out of 17 have come since 2000. By contrast, more than a century has gone by since the planet had a record cold year (1911). At European level, based on the three different observational records of global average annual near-surface (land and ocean) temperature, 2007-2016 decade was 0.87 to 0.92 °C warmer than the pre-industrial average, which makes it the warmest decade on record. Of the 17 warmest years on record, 16 have occurred since 2000. In Romania, the mean annual air temperature rose by 0,6°C in the last 100 years. The evolution by decades of the mean multiannual air temperature over the 1901-2015 period show that the increasing trend is obvious especially beginning with 1991, 2015 being the warmest year of the records. This paper will make an analysis of 2006 - 2015 decade climate (using temperatures and precipitations records for western part of Romania) using several drought indices. [ABSTRACT FROM AUTHOR]