Overview

This page is part of the Aerosol model (SALSA) documentation.
It contains a description of SALSA.
For an overview of all SALSA-related pages, see the SALSA main page.

Example Setups

An example set-up for including SALSA to PALM can be found ​here. This test set-up called "urban_environment_salsa" is for a very small urban area and can thus be run on a personal computer. The features of the set-up are following:

• The simulation domain is the same as in the test case ​urban_environment and the set-up has been extended by enabling SALSA and introducing aerosol and gas emissions above streets and background air pollutant concentrations.
• In SALSA, the aerosol size distribution is represented with 8 size bins (see nbin) and the aerosols can contain organic compounds, nitrates and ammonia (see listspec).
• The following aerosol dynamic processes are included: deposition (on both vegetation and other surfaces), condensation and coagulation.
• The background concentrations for both aerosols and gaseous compounds are read from a dynamic driver (initializing_actions = 'inifor set_constant_profiles'). If instead one wants to define the background concentrations within the parameter file, one must set initializing_actions = 'set_constant_profiles'. See dpg, sigmag, n_lognorm and mass_fracs_a for aerosols and H2SO4_init, HNO3_init, NH3_init, OCNV_init and OCSV_init for gases.
• The concentrations are set constant at the left and right lateral boundaries (see bc_aer_l and bc_aer_r) to avoid accumulation of air pollutants to the domain when cyclic boundary conditions are applied for the flow.
• Surface emissions are enabled and they are read from a file (salsa_emission_mode = 'read_from_file').

The following input files are included:

• urban_environment_salsa_p3d: Parameter file
• urban_environment_salsa_static: Static driver including information on topography, vegetation and land use
• urban_environment_salsa_salsa: Input file for aerosol emissions (with the level of detail 2)
• urban_environment_salsa_chemistry: Input file for gaseous emissions (with the level of detail 2)
• urban_environment_salsa_dynamic: Dynamic driver including the initial meteorological conditions and background concentrations, as well as time-dependent forcing for meteorological variables and aerosol and gas concentrations.