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Version 3 of the Global Aridity Index and Potential Evapotranspiration Database

Open access
Zomer, Robert J., Xu, Jianchu, Trabucco, Antonio·2022·Scientific Data

Abstract

The “Global Aridity Index and Potential Evapotranspiration Database - Version 3” (Global-AI_PET_v3) provides high-resolution (30 arc-seconds) global hydro-climatic data averaged (1970–2000) monthly and yearly, based upon the FAO Penman-Monteith Reference Evapotranspiration (ET 0) equation. An overview of the methods used to implement the Penman-Monteith equation geospatially and a technical evaluation of the results is provided. Results were compared for technical validation with weather station data from the FAO “CLIMWAT 2.0 for CROPWAT” (ET0: r2 = 0.85; AI: r2 = 0.90) and the U.K. “Climate Research Unit: Time Series v 4.04” (ET0: r2 = 0.89; AI: r2 = 0.83), while showing significant differences to an earlier version of the database. The current version of the Global-AI_PET_v3 supersedes previous versions, showing a higher correlation to real world weather station data. Developed using the generally agreed upon standard methodology for estimation of reference ET 0, this database and notably, the accompanying source code, provide a robust tool for a variety of scientific applications in an era of rapidly changing climatic conditions.

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Metadata

Authors
Zomer, R. J., Xu, J., & Trabucco, A.
Venue
Scientific Data
Published
2022-07-15
Volume
9
Issue
1
Pages
409-409
ISSN
2052-4463 (ISSN-L)
OpenAlex
W4285590095
Cited by
1,263
References
3
Type
data paper
Language
en
Open access
gold

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