Frost days where no snow index per time period

Let infile1 be a time series of the daily minimum temperature TN and infile2 be a corresponding series of daily surface snow amounts. Then the number of days where TN < 0 °C and the surface snow amount is less than 1 cm is counted. The temperature TN have to be given in units of Kelvin. The date information of a timestep in outfile is the date of the last contributing timestep in infile.

Usage

cdo_fdns(ifile1, ifile2, ofile = NULL)

Arguments

ifile1, ifile2

Strings with the path to the input files.

ofile

String with the path to the output file.