Define a MYSTIC 2D temperature input file.
mc_temperature_file file
Nx Ny dx dy
ix iy temperature
The expected format of the temperature file is:
where Nx and Ny are the number of grid boxes in x- and y-direction,
dx and dy are the size of the grid boxes in km.
In the second and the following lines the indices in x- and y-direction
and the temperature of the pixel are specified.