dens_file gas_species [unit] filenameAt the moment following gas_species are included: ozone (O3), nitrogen dioxide (NO2), water vapor (H2O), bromine oxide (BRO), chlorine dioxide (OCLO), formaldehyde (HCHO), and carbon dioxide (CO2). The gas species is identified by their abbrevations given in the parenthesis above. unit is an optional argument to define the unit of the density. The profiles can be given in particles per cm3 (cm
To scale the profile to a total column value use dens_column.
For airmass factor calculations it is for some species necessary to account for the variation of the profile with sza. This may be accomplished by specifying a dens_file in the following format:
0.0 SZA1 SZA2 ... z(1) dens(1,1) ... z(2) . . . . .where z(i) are the altitude levels above sea level in km, SZA is the solar zenith angle in degrees, and dens is the density [in the specified unit] of the trace gases as function of solar zenith angle and altitude. The matrix may only be specified for one specie. It may however be combined with profiles of other species. A density matrix can only be used in connection with rte_solver sdisort!