climdex.tnn: Monthly Minimum of Daily Minimum Temperature

In climdex.pcic: PCIC Implementation of Climdex Routines

Description

This function computes the climdex index TNn.

Usage

climdex.tnn(ci, freq = c("monthly", "annual"))

Arguments

ci	Object of type climdexInput.
freq	Time frequency to aggregate to.

Details

This function takes a climdexInput object as input and computes the monthly or annual minimum of daily minimum temperature.

Value

A vector containing the value of the index for each month.

References

http://etccdi.pacificclimate.org/list_27_indices.shtml

See Also

climdexInput.raw, climdexInput.csv.

Examples

library(PCICt)

## Create a climdexInput object from some data already loaded in and
## ready to go.

## Parse the dates into PCICt.
tmax.dates <- as.PCICt(do.call(paste, ec.1018935.tmax[,c("year",
"jday")]), format="%Y %j", cal="gregorian")
tmin.dates <- as.PCICt(do.call(paste, ec.1018935.tmin[,c("year",
"jday")]), format="%Y %j", cal="gregorian")
prec.dates <- as.PCICt(do.call(paste, ec.1018935.prec[,c("year",
"jday")]), format="%Y %j", cal="gregorian")

## Load the data in.
ci <- climdexInput.raw(ec.1018935.tmax$MAX_TEMP,
ec.1018935.tmin$MIN_TEMP, ec.1018935.prec$ONE_DAY_PRECIPITATION,
tmax.dates, tmin.dates, prec.dates, base.range=c(1971, 2000))

## Create a monthly timeseries of minimum daily minimum temperature.
tnn <- climdex.tnn(ci)

climdex.pcic documentation built on March 26, 2020, 7:17 p.m.