Calculates the values of bioclimatic indices from monthly temperature and precipitation measurements, following Szelepcsényi et al. 2014.
bioclimate(temp, prec)A matrix or data frame with 12 columns containing temperatures, in degrees C, for each month of the calendar year.
A matrix or data frame with the same dimensions as temp,
containing precipitation measurements in mm for each month of the year.
bioclimate() returns a data.frame whose columns
correspond to:
abt, mean annual biotemperature; mean annual temperature after
replacing entries outside the range 0° to 30° with zeros;
tap, total annual precipitation (mm);
per, potential evapotranspiration ratio
Szelepcsényi Z, Breuer H, Sümegi P (2014) The climate of Carpathian Region in the 20th century based on the original and modified Holdridge life zone system. Cent Eur J Geosci 6, 293–307. doi:10.2478/s13533-012-0189-5
Holdridge L. R. (1959) Simple method for determining potential evapotranspiration from temperature data. Science, 130, 572. doi:10.1126/science.130.3375.572