The paradoxical increase of Mediterranean extreme daily rainfall in spite of decrease in total values

Details The paradoxical increase of Mediterranean extreme daily rainfall in spite of decrease in total values The paradoxical increase of Mediterranean extreme daily rainfall in spite of decrease in total values

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29k..31a&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 11, pp. 31-1, CiteID 1536, DOI 10.1029/2001GL013554

Physics

37

Hydrology: Precipitation (3354), Hydrology: Floods, Global Change, Global Change: Climate Dynamics (3309)

Scientific paper

Earlier reports indicated some specific isolated regions exhibiting a paradoxical increase of extreme rainfall in spite of decrease in the totals. Here, we conduct a coherent study of the full-scale of daily rainfall categories over a relatively large subtropical region- the Mediterranean- in order to assess whether this paradoxical behavior is real and its extent. We show that the torrential rainfall in Italy exceeding 128 mm/d has increased percentage-wise by a factor of 4 during 1951-1995 with strong peaks in El-Nino years. In Spain, extreme categories at both tails of the distribution (light: 0-4 mm/d and heavy/torrential: 64 mm/d and up) increased significantly. No significant trends were found in Israel and Cyprus. The consequent redistribution of the daily rainfall categories -torrential/heavy against the moderate/light intensities - is of utmost interest particularly in the semi-arid sub-tropical regions for purposes of water management, soil erosion and flash floods impacts.

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