Trend analysis of annual and seasonal precipitation data in Arcadia region (Greece)

The purpose of the present study is to analyze the annual and seasonal precipitation trends in the prefecture of Arcadia, in Greece. Data series are based on records of 10 ground-based meteorological stations plus the available CRU TS 4.05 data series for Greece and for the geographic region of Peloponnese. The study contains a 30-year reference period from 1980 to 2009 and the last decade from 2010 to 2020. Homogeneity and serial correlation tests are considered in the analysis. Mostly negative trends are observed in annual and seasonal (except summer and irrigation period) series of reference period, with the majority of the significant trends to be in irrigation and autumn periods. The observed negative trends of the reference period tended to be transformed into positive trends over the last decade. Regarding the CRU TS 4.05 precipitation data, weak negative annual trends were observed during the reference period. However, significant positive trends were observed during autumn and irrigation periods. In the last decade, significant positive trends were detected during summer and irrigation periods. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.