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|Title:||European drought climatologies and trends based on a multi-indicator approach|
|Authors:||SPINONI JONATHAN; NAUMANN GUSTAVO; VOGT Juergen; BARBOSA PAULO|
|Citation:||GLOBAL AND PLANETARY CHANGE vol. 127 p. 50-57|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in periodicals and books|
|Abstract:||Drought is one of the most important weather-induced phenomena which may have severe impacts on different areas such as agriculture, economy, energy production, and society. From a meteorological point of view, drought can be induced and/or reinforced by lack of precipitation, hot temperatures and enhanced evapotranspiration. Starting from a multi-indicator approach, we present European-wide meteorological drought climatologies and trends for the period 1950-2012. As input data, we used precipitation and temperature data from the E-OBS (spatial resolution: 0.25˚x0.25˚) gridded dataset of the European Climate Assessment and Dataset (ECA&D). Precipitation, temperature, and the derived potential evapotranspiration (PET) have been used to compute three drought indicators: the Standardized Precipitation Index (SPI), the Standardized Precipitation Evapotranspiration Index (SPEI), and the Reconnaissance Drought Index (RDI). SPI, SPEI, and RDI, calculated for 12-month accumulation period, have been rationally merged into a combined indicator and this quantity has been used to obtain drought frequency, duration, and severity for the entire Europe. We identified the following drought hotspots: Scandinavia, Eastern Europe, and Russia in 1951-1970, no particular hotspot in 1971-1990, the Mediterranean region and the Baltic Republics in 1991-2010. A linear trend analysis shows that drought variables increased in the period 1950-2012 in South-Western Europe, in particular in the Mediterranean and Carpathian regions, with precipitation decrease and PET increase as drivers. Drought variables show a decrease in Scandinavia, Belarus, Ukraine and Russia: precipitation increase is there the main driver. In Central Europe and the Balkans, drought variables show a moderate increase, for the significant PET decrease outbalances a not significant precipitation decrease.|
|JRC Directorate:||Sustainable Resources|
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