cox_and_munk_pcl_map file [variable_name]where file is the location of the netCDF file. libRadtran reads the value at the nearest pixel to the given latitude and longitude. No spatial interpolation or averaging of the values is done.
The expected name of the pigment concentration variable is per default salinity, but can be changed with the optional argument variable_name. The pigment concentration must be provided as function of latitude and longitude, salinity(lat, lon), or additionally may also depent on time salinity(time, lat, lon). If a time-dependent salinity is specified, the salinity will be interpolated according to the option time_interpolate. All grids must be provided as double lat(lat), double lon(lon), and double time(time).