globe: Globe temperature

In meteor: Meteorological Data Manipulation

Globe temperature

Description

Globe temperatures (Tg, Tnwb, WBGT).

The can be computed for either a data.frame or a SpatRasterDataset. These must have variables "temp" (C), "rhum" (%), "wind" (m s-1), and "srad" (J s-1 m-2). The data.frame must also have a variable "date".

Usage

## S4 method for signature 'data.frame'
Tg(x, latitude)
## S4 method for signature 'SpatRasterDataset'
Tg(x, filename="", overwrite=FALSE, ...)

## S4 method for signature 'data.frame'
Tnwb(x, latitude, kelvin=FALSE)
## S4 method for signature 'SpatRasterDataset'
Tnwb(x, kelvin=FALSE, filename="", overwrite=FALSE, ...)

## S4 method for signature 'data.frame'
WBGT(x, latitude, kelvin=FALSE)
## S4 method for signature 'SpatRasterDataset'
WBGT(x, kelvin=FALSE, mask=NULL, filename="", overwrite=FALSE, ...)

Arguments

x	data.frame or SpatRasterDataset
latitude	numeric
filename	character. Output filename
overwrite	logical. If TRUE, filename is overwritten
...	additional arguments for writing files as in writeRaster
kelvin	logical. Set to TRUE of the units of temperature are in Kelvin
mask	NULL of SpatRaster. if a SpatRaster is used, it should have one layer. No computations are done for cells that are NA, and these are set to NA in the output

Value

numeric or SpatRaster

Examples

wd <- data.frame(date=as.Date("2003-08-28") + 1:3, 
		temp=c(19.1, 20.6, 19.4), 
		rhum=c(66,71,73), 
		wind=c(3.3, 1.9, 1.1), 
		srad=c(168, 178, 125))
Tg(wd, 40.96) 

Tnwb(wd, 40.96) 

WBGT(wd, 40.96) 


library(terra)
r <- rast(ncol=2, nrow=2, nlyr=1)
temp <- setValues(r, 21:24)
time(temp) <- as.Date("2000-01-01")
rhum <- setValues(r, 81:84)
wind <- setValues(r, 9:12)
srad <- setValues(r, 100:103)
s <- sds(list(temp=temp, rhum=rhum, wind=wind, srad=srad))

x <- Tg(s)
y <- WBGT(s)

meteor documentation built on July 26, 2023, 5:16 p.m.