Moisture index

Japanese: moisture index(英語表記)moistureindex
Moisture index

...In addition, A. Meyer takes the ratio of precipitation to vapor pressure deficit, which is the main factor in evaporation.
[Moisture index]
From the viewpoint of water balance, it is more reasonable to indicate the wetness or dryness of the climate by calculating the water surplus or shortage, which is the difference between the amount of precipitation and the maximum possible amount of evaporation from the earth's surface when sufficient water is supplied (potential evapotranspiration, maximum possible evapotranspiration). In other words, if the amount of precipitation is greater than the potential evapotranspiration, there is a water surplus, and if the opposite is true, there is a water shortage.

*Some of the terms that refer to "moisture index" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…なお,A.マイヤーは降水量と蒸発の主要因子である飽差との比をとっている。
[湿潤示数moisture index]
 水収支の観点からすると,気候の乾湿を示すには降水量と,十分に水を供給したときに地表から蒸発散する最大可能量(蒸発散位,最大可能蒸発散量)との差である水過剰量,水不足量を求めることがより合理的である。つまり降水量が蒸発散位より多ければ水過剰,その逆の場合には水不足となる。…

※「moisture index」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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