Version 3 of the Global Aridity Index and Potential Evapotranspiration Database

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” ( ET 0 : r 2 = 0 .85; AI: r 2 = 0.90 ) and the U.K. “Climate Research Unit: Time Series v 4.04” ( ET 0 : r 2 = 0 .89; AI: r 2 = 0 .83 ), while showing significant…

• IF
  International Fine Particle Research Institute
• EC
  European Commission

  Award: 101003881
• NN
  National Natural Science Foundation of China

  Award: 31861143002
• YP
  Yunnan Provincial Science and Technology Department

  Award: 202101AS070045
• CO
  Consortium of International Agricultural Research Centers