6533b857fe1ef96bd12b3a91

RESEARCH PRODUCT

The effect of observation timescales on the characterisation of extreme Mediterranean precipitation

María José López-garcíaA. M. Camarasa BelmonteJ. Soriano García

subject

Maximum intensityMediterranean climategeographygeography.geographical_feature_categorylcsh:Dynamic and structural geologyPrecipitacions (Meteorologia)Rain intensitylcsh:QE1-996.5Water authorityGeneral Medicinelcsh:Geologylcsh:QE500-639.5PeninsulaClimatologyEnvironmental sciencelcsh:QPrecipitationlcsh:Science

description

Abstract. This paper analyses the behaviour of five rainfall indicators (maximum intensity, cumulative rainfall, irregularity, probability of rain and persistence of rain) over different observation timescales ranging from 5 min to 24 h. It covers a large area on the Mediterranean side of the Iberian Peninsula (River Júcar Water Authority, 43 000 km2) on a continuous basis over a period of 14 years (1994–2007). The results show that the behaviour of extreme Mediterranean rainfall is heavily dependent on the observation timescale. There are a number of turning points in the indicator trends which occur on different timescales (1 and 6 h in the case of rain intensity and irregularity, 6 h for cumulative rainfall and between 15 and 30 min for the persistence of rain) and may be relevant for the determination of thresholds used in water management.

https://doi.org/10.5194/adgeo-26-61-2010