GAEZ - Global Agro-Ecological Zones

Agro-climatic Resources

For the global agro-ecological zones assessment GAEZ v3.0, time series data are used from the Climate Research Unit (CRU) at the University of East Anglia. Seven climatic variables are required for GAEZ climate analysis: mean 24 hour temperature, diurnal temperature range, sunshine fraction, wind speed, relative humidity, wet day frequency and precipitation. The precipitation data used was obtained from the German Weather Service (Global Precipitation Climatology Centre – GPCC) and the Johann Wolfgang Goethe-University Frankfurt (Institute for Atmosphere and Environment). [...]

Historical and baseline climatic resources data

Historical and baseline climatic resources data

From these resulting 5 arc-minute grids of the climate parameters, a number of climate indicators were compiled representing agronomically relevant thermal regime data, moisture regime data and growing period data for individual years between 1961 and 2000 and baseline climate (1961-1990).

Future climatic conditions

Future climatic conditions

For the analysis of climate change impacts on agricultural production potential, various available climate predictions of General Circulation Models (GCM) were used for characterization of future climates. Current available GAEZ v3.0 results are based on four major GCMs and cover a range of IPCC emission scenarios.

GCM model outputs for individual climate attributes were applied as follows: Deviations of the monthly means of three 30-year periods (the 2020s: years 2011-2040; the 2050s: years 2041-2070; and the 2080s: years 2071-2100) from the GCM ‘baseline’ climate were calculated for each grid of the respective GCMs, interpolated to 30 arc-minute resolution and subsequently applied to the CRU baseline climatology (1961-1990) to represent respective future climates.

Reference length of growing period (1961-1990)

Reference length of growing period, © Fao


Rice terraces. Indonesia. ©FAO/Roberto Faidutti / FAO
Dominant land cover pattern. GAEZ. ©FAO/IIASA
Input supply to vulnerable populations under the ISFP. Kenya. ©FAO/Sarah Elliott / FAO
Thermal zones. GAEZ. ©FAO/IIASA
Close up of apples, limes, oranges and tomatoes on sale at a local market in Nepal. ©FAO/Giampiero Diana / FAO
Aggregate crop yield in 2000. GAEZ. ©FAO/IIASA
Harvesting rice in east Java. Indonesia. H. Null / FAO
Dominant land cover pattern. GAEZ. ©FAO/IIASA
Flood recession rice fields. Cambodia. ©FAO/ Giuseppe Bizzarri/ FAO
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