Grid of estimated aridity with a spatial resolution of 10 arc minutes. This dataset represents average yearly precipitation divided by average yearly potential evapotranspiration, an aridity index defined by the United Nations Environmental Programme (UNEP).
The classification of the aridity index is:
- Classification Aridity Index Global land area
- Hyperarid AI < 0.05 - 7.5% of the global land area
- Arid 0.05 < AI < 0.20 - 12.1% of the global land area
- Semi-arid 0.20 < AI < 0.50 - 17.7% of the global land area
- Dry subhumid 0.50 < AI < 0.65 - 9.9% of the global land area
Contact points:
Metadata contact: AQUASTAT FAO-UN Land and Water Division
Data lineage:
The input data used to calculate this dataset are part of the "CRU CL 2.0 Global Climate Dataset" prepared by the Climate Research Unit of the University of East Anglia, UK, and distributed through the website: http://www.cru.uea.ac.uk/~timm/grid/CRU_CL_2_0.html).
Resource constraints:
copyright
Online resources:
Online link to the 'The CRU CL 2.0'- website
Download . Global map of aridity (ESRI GRID)
