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Fingerprint of climate change in precipitation aggressiveness across the central Mediterranean (Italian) area

Abstract : Rainfall erosivity and its derivative, erosivity density (ED, i.e., the erosivity per unit of rain), is a main driver of considerable environmental damages and economic losses worldwide. This study is the first to investigate the interannual variability, and return periods, of both rainfall erosivity and ED over the Mediterranean for the period 1680-2019. By capturing the relationship between seasonal rainfall, its variability, and recorded hydrological extremes in documentary data consistent with a sample (1981-2015) of detailed Revised Universal Soil Loss Erosion-based data, we show a noticeable decreasing trend of rainfall erosivity since about 1838. However, the 30-year return period of ED values indicates a positive long-term trend, in tandem with the resurgence of very wet days (>95th percentile) and the erosive activity of rains during the past two decades. A possible fingerprint of recent warming is the occurrence of prolonged wet spells in apparently more erratic and unexpected ways.
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https://hal.inrae.fr/hal-03121072
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Submitted on : Tuesday, January 26, 2021 - 10:10:01 AM
Last modification on : Wednesday, March 24, 2021 - 9:08:01 AM

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Nazzareno Diodato, Fredrik Charpentier Ljungqvist, Gianni Bellocchi. Fingerprint of climate change in precipitation aggressiveness across the central Mediterranean (Italian) area. Scientific Reports, Nature Publishing Group, 2020, 10 (1), ⟨10.1038/s41598-020-78857-3⟩. ⟨hal-03121072⟩

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