pici {ClimInd}

Pinna Combinative Index

Description

Pinna combinative index is an aridity–humidity index

Usage

pici(pr, taverage, data_names = NULL, na.rm = FALSE, ...)

Arguments

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

Value

index value

Formula

PICI = \frac {1}{2} \left(\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

References

Zambakas J. 1992. General Climatology. Department of Geology, National & Kapodistrian University of Athens: Athens, Greece.

Examples

data(data_all)
pici(pr = data_all$rr, taverage = data_all$tg)