add_indices: Add drought indices to a data.frame of climate variables

In cszang/clex: Statistical downscaling of monthly climate data

Description

Currently add DMI, and SPEI and SPI for different scales. PET for SPEI is computed according to Hargreaves.

Usage

add_indices(
  x,
  scales = c(1, 2, 3, 6, 12),
  id = "id",
  lat = "lat",
  tmean = "tmean",
  tmin = "tmin",
  tmax = "tmax",
  prec = "prec",
  drop_lat = TRUE
)

Arguments

x	a data.frame with climate data, that has at least id for location id, lat for latitude, year, month, tmean, tmin, and tmax for mean, minimum, and maximum temperature, and prec for precipitation.
scales	for which temporal scales should spei and spi be computed
id	character string for location id variable
lat	character string for lat variable
tmean	character string for tmean variable
tmin	character string for tmin variable
tmax	character string for tmax variable
prec	character string for prec variable
drop_lat	should latitude be dropped from result?

Value

a data.frame consisting of the original climate data with additional variables for drought indices

cszang/clex documentation built on Sept. 27, 2020, 2:42 p.m.