Apr 22, 2024 · The Standardized Precipitation Evapotranspiration Index (SPEI) is an extension of the widely used Standardized Precipitation Index (SPI). The SPEI is designed to take into …

The Standardized Precipitation Evapotranspiration Index (SPEI) is a multiscalar drought index based on climatic data. It was developed by Vicente-Serrano et al. (2010) at the Institute …

The SPEI is based on the climatic water balance, which is the difference between precipitation and potential evapotranspiration. Like the SPI, the SPEI is based on a probabilistic approach, …

Calculation of the Standardized Precipitation-Evapotranspiration In-dex (SPEI) and the Standardized Precipitation Index (SPI). Given a time series of the climatic water balance …

cipitation Index (SPI) The SPI is the most used indicator worldwide for detecting and characterising meteorological droughts. The SPI indicator, which was developed by McKee et …

The SPEI allows comparison of drought severity through time and space, since it can be calculated over a wide range of climates. The function spei calculates the index based on the …

The formula for SPEI is attached and is straightforward. This should be easy to calculate in Matlab. W is -2ln (P), and P is 1-F (x). I don't understand how to calculate F (x).

The SPEI is designed to take into account both precipitation and potential evapotranspiration (PET) in determining drought. Thus, unlike the SPI, the SPEI captures the main impact of …

The main objective of this article is to provide more flexible and robust options for computation and use of the SPEI, explain possible sources of error, and provide advice on the use of the …

SPEI has an intensity scale in which both positive and negative values are calculated, identifying wet and dry events. It can be calculated for time steps of as little as 1 month up to 48 months …