The flag aerosol strat parameter

The flag_aerosol_strat parameter is an integer flag which sets which forcing is used for stratospheric aerosols optical properties (i.e. format of the taustrat*.nc files read by the model; see https://trac.lmd.jussieu.fr/LMDZ/browser/LMDZ6/trunk/libf/phylmd/readaerosolstrato_m.F90) :

• flag_aerosol_strat = 0 : no stratospheric aerosols (default value)
• flag_aerosol_strat = 1 : old forcings (only case; only one optical parameter)
• flag_aerosol_strat = 2 : 2 files corresponding to SW and LW spectral bands (files tauswstrat.2D.nc and taulwstrat.2D.nc) with 3 optical parameters. This option was introduced for CMIP6 runs using RRTM (i.e. requires rrtm=1 flag)

21/11/2023