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Open AccessArticle

A Homogeneous Dataset for Rainfall Trend Analysis in the Calabria Region (Southern Italy)

1
National Research Council-Institute for Agricultural and Forest Systems in Mediterranean (CNR-ISAFOM), 87036 Rende, Italy
2
Multi-Risk Functional Center, Regional Agency for Environmental Protection of Calabria, 88100 Catanzaro, Italy
3
National Research Council-Research Institute for Geo-Hydrological Protection (CNR-IRPI), 87036 Rende, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(9), 2541; https://doi.org/10.3390/w12092541
Received: 15 July 2020 / Revised: 11 August 2020 / Accepted: 7 September 2020 / Published: 11 September 2020
In order to investigate the tendency in rainfall amount in Calabria (southern Italy), in this work, monthly rainfall series were first tested for homogeneity and then a trend analysis was performed. In particular, a homogenization approach based on the Climatol method was applied to homogenize monthly climatological series. Then, the Mann–Kendall non-parametric test and the Theil–Sen estimator were applied to evaluate the presence of trends and their significance in the monthly, seasonal and annual rainfall series. Moreover, the trend slopes were further evaluated with a linear regression analysis. At the annual scale, results evidenced a decreasing trend mainly in the north-eastern part of the region. At the seasonal scale, a spatial distributed negative trend in winter, and a positive trend in summer, mainly localized in the north-western part of the region, were identified. Finally, on a monthly scale negative trends spreading across the region were detected in January and December, with an opposite behavior in July and especially in September, when almost the entire region presented a positive trend. View Full-Text
Keywords: rainfall; homogeneity; trend; Calabria rainfall; homogeneity; trend; Calabria
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MDPI and ACS Style

Caloiero, T.; Filice, E.; Coscarelli, R.; Pellicone, G. A Homogeneous Dataset for Rainfall Trend Analysis in the Calabria Region (Southern Italy). Water 2020, 12, 2541.

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