About the Data

About the Project

Terms and Conditions

WebGIS Tutorial

SPEI3_int describes the peak intensity of 3-month drought conditions. It is defined as the minimum SPEI3 value over a year or a season.
SPEI3 gives a measure of the surface water balance (i.e., the difference between precipitation and potential evapotranspiration) over a period of three months relative to the long-term average. SPEI3 values around 0 indicate normal conditions, while values below -1 indicate deficit conditions (e.g., -1 corresponds to a deficit of one standard deviation).
SPEI3 values for the current period are derived from the daily SPEI dataset produced by the (<a href="https://www.alpine-space.eu/project/ado/">ADO project</a>) adopting 1981-2020 as calibration period and Penman-Monteith equation for the potential evapotranspiration calculation. The monthly SPEI3 values are derived by retaining the last SPEI3 entry of each month. For future projections, the potential evapotranspiration used for SPEI calculation is estimated from minimum and maximum temperature based on the Hargreaves equation, while the calibration period corresponds to GWL 0.61 °C. Further details on data and SPEI calculation are available in “About the data”. Unit: 1

X-RISK-CC

Alpine Space report

Glossary

WebGIS index description

Pilot reports

Eleanor [6.0 MB]

Garmisch [4.1 MB]

Gorenjska (drought) [8.1 MB]

Gorenjska (floods) [11 MB]

Vaia storm [7.5 MB]

Wipptal Stubaital [6.0 MB]

SPEI3_int - Three-month drought peak intensity i

Historical 1991-2020

▦ PNG image

▦ NetCDF grid

◍ NUTS3 aggregates