Maximum number of consecutive days with precipitation at or above a
threshold. This is the ETCCDI CWD index.
Usage
ck_wet_days(precip, dates, threshold = 1, period = "annual")
Arguments
- precip
Numeric vector of daily precipitation (mm).
- dates
Date vector of the same length as precip.
- threshold
Numeric. Wet day threshold in mm (default 1).
- period
Character. Aggregation period: "annual" (default) or
"monthly".
Value
A data frame with columns period, value, index, and unit.
Details
Note: the same letters CWD also denote the ET-SCI cold-wave duration
index, which is unrelated and is implemented in ck_cwd(). In
ck_compute() the name "cwd" resolves to cold-wave duration, not to
this function; use "wet_days" or the unambiguous alias
"consecutive_wet_days" for consecutive wet days.
Examples
dates <- as.Date("2024-01-01") + 0:9
precip <- c(5, 3, 0, 2, 8, 1, 0, 0, 4, 6)
ck_wet_days(precip, dates)
#> period value index unit
#> 1 2024-01-01 3 wet_days days