SPEI-package: Calculation of the Standardised Precipitation-Evapotranspiration Index
Description
A set of functions for computing potential evapotranspiration and several widely used drought indices including the Standardized Precipitation-Evapotranspiration Index (SPEI).Details
Functions spei and spi are the workhorse of the SPEI library. Other functions such as kern, cdfglo or pglo are auxiliary low-level functions and they will not be used directly by the typical user. Functions for computing potential evapotranspiration are provided, too, for helping computing the SPEI. They are: thornthwaite, hargreaves and penman.References
S.M. Vicente-Serrano, S. Beguería, J.I. López-Moreno. 2010. A Multi-scalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index – SPEI. Journal of Climate 23: 1696, DOI: 10.1175/2009JCLI2909.1.http://sac.csic.es/spei/