Figure

Duration of meteorological droughts

Figure Created 29 Oct 2021 Published 20 Jan 2022 Last modified 20 Jan 2022

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Topics: Climate change adaptation

The duration of meteorological droughts represents the average number of months in a year experiencing drought conditions as determined by anomalously low precipitation values. The index is based on the Standardized Precipitation Index aggregated over three months (SPI-3), which accounts for the deficit or surplus of precipitation with respect to a reference period. Alternative aggregation periods for SPI can be used depending on the type of drought considered and the specific applications. SPI values represent standard deviations of precipitation from the long-term mean. A drought event is considered to start when SPI values fall below -1 for at least two consecutive months and to end when the index returns to a positive number (see the ETC-CCA Technical Paper for details).

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Rights:: EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged (https://www.eea.europa.eu/legal/copyright). Copyright holder: Statistical Office of the European Union (Eurostat).
Owners:: Statistical Office of the European Union (Eurostat)
Processors:: European Topic Centre on Air and Climate Change (ETC/ACC)
Figure type:: Graph

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