ADO Factsheet: Standardized Precipitation Index (SPI)

FAIR Overall Score

Abstract

The Standardised Precipitation Index (SPI) is the most commonly used index worldwide for detecting and characterising meteorological droughts. A meteorological drought is defined as a period with abnormal precipitation deficit, in relation to normal conditions for a region, represented as a long-term average. The SPI shows the normalisedanomalies (deviations from the long-term average) of the observed total precipitation for any given location and accumulation period of interest. The name of the index is usually modified to include the accumulation period. SPI-3, for example, refers to accumulation period of three months (JRC EDO, 2020).

Keywords

SPI, ADO, ADO project, Standardized Precipitation Index, ADO platform, cct, Slovenia, Italy, Europe, Austria, Hydrography, natural dynamics, natural areas, landscape, ecosystems, climate, disasters, accidents, risk, water