Aerosol model SALSA

This page is under construction. For now, please have a look at the related ​article (under revision).

SALSA runs with the default parameter values. By default, the aerosol particle and gaseous concentrations are initially constant everywhere (isdtyp = 0 and igctyp = 0). A minimum set of input parameters to be applied when this initialisation type is used, is:

• dpg, n_lognorm and sigmag to describe the initial aerosol size distribution plus

• listspec, mass_fracs_a to include chemical compounds plus

• H2SO4_init, HNO3_init, NH3_init, OCNV_init, OCSV_init to set the initial concentrations of gaseous compounds plus

• nlcnd, nlcndgas, nlcndgash2oae, nlcoag, nldepo, nldepo_topo, nldepo_vege, nsnucl to switch on aerosol dynamic processes.

Alternatively, the initial aerosol particle concentrations, size distributions and chemical compositions and gaseous concentrations as well as emission/source information of aerosol particles and gases can be provided in NetCDF input files <run_identifier>_salsa (for aerosol particles) and <run_identifier>_chemistry (for gaseous compounds). Aerosol particle emissions can be provided applying three levels of detail (LOD): parametrised (LOD1, units kg m^-2 s^-1) or detailed (LOD2, units m^-2 s^-1) 2-dimensional surface fluxes, or 3-dimensional sources (LOD3, units m^-3 s^-1). Gaseous emissions, instead, should currently be specified as gas-specific surface fluxes (LOD2) if the chemistry module is not applied. The time dependency of the aerosol emissions has not yet been implemented. Example files for each LOD is provided in the attached test_salsa example set-up.

The attached test_salsa example includes:

• test_salsa_p3d: ASCII parameter file
• test_salsa_static: NetCDF static-information file with topography information (so-called static driver)
• test_salsa_chemistry: a NetCDF information file including the initial vertical profiles and surface emissions of gaseous compounds (H2SO4, HNO3, NH3, OCNV and OCSV)
• LODX_test_salsa_salsa: a NetCDF information including the initial vertical profiles and emissions of aerosol particles for each level of detail X = 1, 2, 3. NOTE! Copy the chosen file to test_salsa_salsa

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