ck_r99p: Extremely Wet Days Total (R99p)

In climatekit: Unified Climate Indices for Temperature, Precipitation, and Drought

Extremely Wet Days Total (R99p)

Description

ETCCDI canonical index R99p. Annual total precipitation on days where daily precipitation exceeds the 99th percentile of wet-day precipitation in a reference period (default 1961 to 1990). Same convention as ck_r95p().

Usage

ck_r99p(precip, dates, ref_start = 1961L, ref_end = 1990L, period = "annual")

Arguments

precip	Numeric vector of daily precipitation (mm).
dates	Date vector of the same length as precip. Must contain data covering the reference period.
ref_start, ref_end	Integer. Reference period boundary years (inclusive). Defaults to 1961 and 1990.
period	Character. Aggregation period: "annual" (default) or "monthly".

Value

A data frame with columns period, value, index, and unit.

Examples

set.seed(1)
dates <- seq(as.Date("1961-01-01"), as.Date("1991-12-31"), by = "day")
precip <- pmax(rgamma(length(dates), shape = 0.4, scale = 8) - 1, 0)
tail(ck_r99p(precip, dates))

climatekit documentation built on May 9, 2026, 5:08 p.m.