Global Humidity Index
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下载链接：
https://cmr.earthdata.nasa.gov/search/concepts/C2232847604-CEOS_EXTRA.html
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资源简介：
The Global Humidity Index is based on a ratio of annual precipitation and potential evapotrans- piration (these data layers are described elsewhere) as P/PET, and largely follows the classification used in a 1984 UNESCO study. The Global Humidity Index surface shows mean annual potential moisture availability for the period 1951-1980, classified into four aridity zones and one humid zone, defined in this data set as follows:
Hyper-Arid Zone P/PET less than 0.05
Arid Zone 0.05 less equal P/PET less than 0.20
Semi-Arid Zone 0.20 less equal P/PET less than 0.50
Dry-Subhumid Zone 0.50 less equal P/PET less than 0.65
Humid Zone 0.65 less equal P/PET
提供机构：
CEOS_EXTRA
