Emberger aridity index
Aridity index based on annual precipitation and temperature range
eai(pr, taverage, data_names = NULL, na.rm = FALSE, ...)
pr |
daily precipitation, mm |
taverage |
daily mean temperature, Celsius |
data_names |
names of each period of time |
na.rm |
logical. Should missing values (including NaN) be removed? |
... |
further arguments passed to or from other methods |
index value
EAI = \frac {100*P}{Thm^2 - Tcm^2}
P = annual precipitation; Thm = Average temperature of the hottest month in Kelvin; Tcm= Average temperature of the coldest month in Kelvin
Emberger L. 1930. La végétation de la région méditerranéenne: essai d'une classification des groupements végétaux Revue Générale de Botanique, 42 (641–662), pp. 705-721
data(data_all) eai(pr = data_all$rr, taverage = data_all$tg)
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