***** 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. Data access =========== Data access is realized with the `NetCDF Subset Service`_. The most recent two forecasts are available on a rolling basis. The request can be constructed `interactively `__; an example request looks like this: http://silam.fmi.fi/thredds/ncss/silam_europe_v5_5/runs/silam_europe_v5_5_RUN_2017-02-15T00:00:00Z?var=cnc_HCHO_gas&var=cnc_HNO3_gas&var=pressure&disableLLSubset=on&disableProjSubset=on&horizStride=1&time_start=2017-02-15T01%3A00%3A00Z&time_end=2017-02-20T00%3A00%3A00Z&timeStride=1&vertStride=1&addLatLon=true&accept=netcdf4 .. _SILAM: http://silam.fmi.fi/ .. _FMI: http://en.ilmatieteenlaitos.fi/ .. _`NetCDF Subset Service`: https://www.unidata.ucar.edu/software/thredds/current/tds/reference/NetcdfSubsetServiceReference.html