koi: Kerner Oceanity Index

In ClimInd: Climate Indices

Description

KOI analysed the oceanity assuming that marine climates have colder spring months in comparison with the autum months.

Usage

koi(data, data_names = NULL, na.rm = FALSE, ...)

Arguments

data	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

KOI = \frac {100(TGo-TGa)}{Thm-Tcm}

TGo = Average temperature of October TGa = Average temperature of April Thm = Average temperature of the hottest month (Celsius); Tcm = Average temperature of the coldest month (Celsius)

References

Zambakas J. 1992.General Climatology. Department of Geology,National & Kapodistrian University of Athens, Athens. Gavilan RG. 2005. The use of climatic parameters and indices in vege-tation distribution. A case study in the Spanish System Central.Int. J.Biometeorol.50: 111–120.

Examples

data(data_all)
koi(data = data_all$tg)

ClimInd documentation built on April 10, 2021, 1:06 a.m.