单词 | humidity index |
释义 | humidity index [hyü`mid·ǝd·ē ´in´deks] CLIMATOLOGY An index of the degree of water surplus over water need at any given station; it is calculated as humidity index = 100s /n, where s (the water surplus) is the sum of the monthly differences between precipitation and potential evapotranspiration for those months when the normal precipitation exceeds the latter, and where n (the water need) is the sum of monthly potential evapotranspiration for those months of surplus. |
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