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Read and Process Global SPEI database data

Source: R/data_speibase.R
read_speibase.Rd

While this data can be downloaded from the Global SPEI database, it is only open for download through manual operations on the web-page. The code for reproducing SPEIbase is open, however. We use this here to process CRU PET and PRE data. The input for SPEIbase 2.11 is CRU v.4.09.

Usage

read_speibase(interval = 6)

Arguments

interval

Integer. The month interval to calculate SPEI over. E.g., if the interval is 6, then monthly precipitation and potential evapotranspiration are aggregated over the last 6 months, then the SPEI (anomaly) is calculated. This is done for each month.

Details

We use R-code from Beguería S. (2017) SPEIbase: R code used in generating the SPEI global database, doi:10.5281/zenodo.834462.

References

Beguería S, Latorre B, Reig F, Vicente-Serrano SM (2024). “SPEIbase v.2.11.” Beguería S, Vicente-Serrano SM, Reig F, Latorre B (2014). “Standardized Precipitation Evapotranspiration Index (SPEI) Revisited: Parameter Fitting, Evapotranspiration Models, Tools, Datasets and Drought Monitoring.” International Journal of Climatology, 34(10), 3001–3023. ISSN 1097-0088, doi:10.1002/joc.3887 , 2018-08-29.

See also

get_pgfile for file retrieval functionality, pg_date_intervals for PRIO-GRID temporal boundaries