Pinna Combinative Index
Pinna combinative index is an aridity–humidity index
pici(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
PICI = \frac {1}{2} ≤ft(\frac{P}{TG+10}+\frac{12Pdm}{TGdm+10}\right)
P = annual precipitation (mm); TG = annual mean temperature (Celsius); Pdm= precipitation of the driest month; TGdm= temperature of the driest month
Zambakas J. 1992. General Climatology. Department of Geology, National & Kapodistrian University of Athens: Athens, Greece.
data(data_all) pici(pr = data_all$rr, taverage = data_all$tg)
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