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Tytuł pozycji:

A review of studies on observed precipitation trends in Italy.

Tytuł :
A review of studies on observed precipitation trends in Italy.
Autorzy :
Caporali, Enrica (AUTHOR)
Lompi, Marco (AUTHOR)
Pacetti, Tommaso (AUTHOR)
Chiarello, Valentina (AUTHOR)
Fatichi, Simone (AUTHOR)
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Temat :
*Water supply
Trend analysis
Regime change
Źródło :
International Journal of Climatology. Jan2021 Supplement S1, Vol. 41, pE1-E25. 25p.
Terminy geograficzne :
Czasopismo naukowe
Research to detect changes in precipitation variables has become a topic of particular interest to understand modifications in water resources availability. The review is focused on the Italian territory, outlining the "state of the art" of changes in precipitation regime through a review of 54 published studies on observed rainfall trend analyses, in the period 1999–2018. The aim is to combine a large body of knowledge in a single review and to explain the main patterns of rainfall changes occurred in Italy over the last decades. The analysis focused on the Total Precipitation (TP) and the number of Wet Days (WDs) indices at the annual and seasonal scale. A weight factor is introduced to take into account the differences among studies in geographical area, time series length, and number of stations. The review is accompanied by the discussion of other rainfall related variables, that is, precipitation intensity, extreme rainfall events and meteorological droughts, which are useful to provide a broader picture of rainfall changes. Overall, there is an agreement about the tendency of a decrease in wet days on the entire Italy, with limited discrepancies in the various regions. A decrease in wet days is accompanied by a negative trend (although less evident) in total precipitation, especially in winter. Nevertheless, a univocal direction of trends (or lack of thereof) in annual total precipitation and mostly hydrological extreme events is difficult to achieve. [ABSTRACT FROM AUTHOR]
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