SILAM

SILAM, the System for Integrated modeLling of Atmospheric coMposition, is a global-to-meso-scale dispersion model developed for atmospheric composition, air quality, and emergency decision support applications, as well as for inverse dispersion problem solution.

The model incorporates both Eulerian and Lagrangian transport routines, 8 chemico-physical transformation modules (basic acid chemistry and secondary aerosol formation, ozone formation in the troposphere and the stratosphere, radioactive decay, aerosol dynamics in the air, pollen transformations), 3- and 4-dimensional variational data assimilation modules.

SILAM source terms include point- and area- source inventories, sea salt, wind-blown dust, natural pollen, natural volatile organic compounds, nuclear explosion, as well as interfaces to ship emission system STEAM and fire information system IS4FRIES.

Available species

As of 08 June 2017, the following species are available from the SILAM model (all on with altitude levels 12.5 50.0 125.0 275.0 575.0 1150.0 2125.0 3725.0 5725.0 7725.0 m):

Variable Parameter value Description
air_dens AIR_DENSITY Air density [kg/m3]
cnc_ALD2_gas   Concentration in air ALD2_gas
cnc_C2O3_gas   Concentration in air C2O3_gas
cnc_C5H8_gas   Concentration in air C5H8_gas
cnc_CH3O2_gas   Concentration in air CH3O2_gas
cnc_CH3OOH_gas   Concentration in air CH3OOH_gas
cnc_CO_gas CO Concentration in air CO_gas
cnc_CRES_gas   Concentration in air CRES_gas
cnc_CRO_gas   Concentration in air CRO_gas
cnc_ETH_gas   Concentration in air ETH_gas
cnc_H2O2_gas   Concentration in air H2O2_gas
cnc_HCHO_gas HCHO Concentration in air HCHO_gas
cnc_HNO3_gas HNO3 Concentration in air HNO3_gas
cnc_HO2_gas   Concentration in air HO2_gas
cnc_HONO_gas   Concentration in air HONO_gas
cnc_MGLY_gas   Concentration in air MGLY_gas
cnc_N2O5_gas   Concentration in air N2O5_gas
cnc_NH3_gas   Concentration in air NH3_gas
cnc_NH415SO4_m_20   Concentration in air NH415SO4_m_20
cnc_NH415SO4_m_70   Concentration in air NH415SO4_m_70
cnc_NH4NO3_m_70   Concentration in air NH4NO3_m_70
cnc_NMVOC_gas NMVOC Concentration NMVOC
cnc_NO2_gas NO2 Concentration in air NO2_gas
cnc_NO3_c_m3_0   Concentration in air NO3_c_m3_0
cnc_NO3_gas   Concentration in air NO3_gas
cnc_NO3rad_gas   Concentration in air NO3rad_gas
cnc_NOP_gas   Concentration in air NOP_gas
cnc_NO_gas NO Concentration in air NO_gas
cnc_O1D_gas   Concentration in air O1D_gas
cnc_O3_gas O3 Concentration in air O3_gas
cnc_OH_gas   Concentration in air OH_gas
cnc_OLE_gas   Concentration in air OLE_gas
cnc_OPEN_gas   Concentration in air OPEN_gas
cnc_O_gas   Concentration in air O_gas
cnc_PAN_gas PANS Concentration in air PAN_gas
cnc_PAR_gas   Concentration in air PAR_gas
cnc_PM10 PM10 Concentration in air PM10
cnc_PM2_5 PM25 Concentration in air PM2_5
cnc_PM_FRP_m1_1   Concentration in air PM_FRP_m1_1
cnc_PM_FRP_m3_1   Concentration in air PM_FRP_m3_1
cnc_PM_FRP_m_17   Concentration in air PM_FRP_m_17
cnc_PM_GFAS_m_50   Concentration in air PM_GFAS_m_50
cnc_PM_m6_0   Concentration in air PM_m6_0
cnc_PM_m_50   Concentration in air PM_m_50
cnc_PNA_gas   Concentration in air PNA_gas
cnc_ROR_gas   Concentration in air ROR_gas
cnc_SO2_gas SO2 Concentration in air SO2_gas
cnc_SO4_m_20   Concentration in air SO4_m_20
cnc_SO4_m_70   Concentration in air SO4_m_70
cnc_TO2_gas   Concentration in air TO2_gas
cnc_TOL_gas   Concentration in air TOL_gas
cnc_XO2N_gas   Concentration in air XO2N_gas
cnc_XO2_gas   Concentration in air XO2_gas
cnc_XYL_gas   Concentration in air XYL_gas
cnc_dust DUST Concentration in air dust
cnc_dust_m1_5   Concentration in air dust_m1_5
cnc_dust_m20   Concentration in air dust_m20
cnc_dust_m6_0   Concentration in air dust_m6_0
cnc_dust_m_30   Concentration in air dust_m_30
cnc_sslt SEASALT Concentration in air sslt
cnc_sslt_m20   Concentration in air sslt_m20
cnc_sslt_m3_0   Concentration in air sslt_m3_0
cnc_sslt_m9_0   Concentration in air sslt_m9_0
cnc_sslt_m_05   Concentration in air sslt_m_05
cnc_sslt_m_50   Concentration in air sslt_m_50
pressure AIR_PRESSURE pressure [Pa]
temperature AIR_TEMPERATURE temperature [K]

Warning

Not all these species have been implemented for MSS-Chem yet. If you receive errors trying to download a species, please open a Github issue and I will promptly add it to the code base.

In order to include a species in the download, add the species’ Parameter value to the species list in the configuration.