envirem (version 2.3)

embergerQ: Emberger's pluviometric quotient

Description

Calculate Emberger's pluviometric quotient.

Usage

embergerQ(P, M, m, tempScale = 1, precipScale = 1)

Value

rasterLayer in mm / degrees C

Arguments

P

rasterLayer, total annual precipitation

M

rasterLayer, mean max temperature of the warmest month

m

rasterLayer, mean min temperature of the coldest month

tempScale

integer; scaling factor for the temperature data, see envirem for additional details.

precipScale

integer; scaling factor for the precipitation data, see envirem for additional details.

Author

Pascal Title

Details

Q = 2000 P / [(M + m + 546.4) * (M - m)]

References

Daget, P. (1977) Le bioclimat méditerranéen: analyse des formes climatiques par le système d’Emberger. Vegetatio, 34, 87–103.

Examples

# Find example rasters
rasterFiles <- list.files(system.file('extdata', package='envirem'), full.names=TRUE)
env <- stack(rasterFiles)

embergerQ(env[['bio_12']], env[['bio_5']], env[['bio_6']], tempScale = 10)