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Abstract
In this study italian bioclimate is characterized considering 390 thermopluviometric stations distribuited along the italian peninsula. To this purpose all the stations have been classified using monthly mean temperatures (Tmax, tmin) and precipitation (P) by cluster analysis and ordinated trough Principal Component Analysis. The simultaneous use of classification and ordination allowed the definition of 26 climatic types (with subtypes). Thermopluviometric diagrams and thermotype and ombrotype indexes were then overlapped to the ordination scattergram. The results allowed interesting considerations about the peninsula:- It is possible to discriminate two major groups (the temperate and the mediterranean-temperate).- The Padanian lowland represents a bioclimatic line related with continentality.- The temperate and the transition temperate regions are distribuited all along the peninsula reaching Calabria.
Hilly and mesomediterranean thermotypes and humid/subhumid ombrotype prevale.- The sharp difference between adriatic an tyrrhenic sectors is confirmed.
