Temperature and Rain Variability in Southwestern Mediterranean Region, 1980-2022

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Abstract Mean temperatures and rainfall evolution have been examined from 1980 to 2022 in Sidi Bel Abbes northwestern Algeria fifty six km far from Alboran Sea in the extreme southwestern Mediterranean Sea. Then, one came to the fact that, contrary to many other scientific results, the rainfall tends to increase even if this augmentation seemed to be slight and difficult to explicate and clarify, when on the other hand temperatures are also clearly augmenting in a really very alarming way collaborating to the global warming. Nevertheless, this trend was not regular and linear, because temperatures and rainfall evolved abruptly alternating rainy years with drier ones when temperatures are growing almost regularly year after year. However, this saw-toothed evolution of the rains remains less pronounced than that of average temperatures, which have increased significantly over these past four decades. Climate of our region seems to be a semi-arid Mediterranean Köppen and Geiger "Csa" climate with rainy cold winter and very dry and hot summer, even if winter becomes slightly more humid but summer substantially more swelter.

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