This dataset contains air quality simulations conducted on Mäkelänkatu in Helsinki, Finland, using the PALM model system 6.0. By default, simulations use modelled data as boundary conditions. This includes modelled meteorological data from MEPS (MetCoOp Ensemble Prediction System) and air pollutant background concentrations from the ADCHEM model. Alternatively, measured meteorology from the Kivenlahti mast in Espoo, Finland, and aerosol size distribution from the SMEAR III station in Kumpula, Helsinki, is applied. Simulations: - 9 June 2017 morning: * 0609_morning: use modelled boundary conditions for meteorology and air pollutants * 0609_morning_allmet_smear: use measured boundary conditions for meteorology and aerosol size distribution * 0609_morning_smear: use modelled boundary conditions for meteorology and measured for aerosol size distribution * 0609_morning_wd_smear: use modelled boundary conditions for meteorology, but modify the wind direction by using the measured wind direction at Kivenlahti. For aerosol size distribution, use the measured boundary conditions. * 0609_morning_wdk_smear: use modelled boundary conditions for meteorology, but modify the wind direction by using the measured wind direction at SMEAR III. For aerosol size distribution, use the measured boundary conditions. * precursor_0609_morning: precursor with modelled boundary conditions for meteorology * precursor_0609_morning_allmet: precursor with measured boundary conditions for meteorology * precursor_0609_morning_wd: precursor with modelled boundary conditions, but the wind direction is modified by using the measured wind direction at Kivenlahti. * precursor_0609_morning_wdk: precursor with modelled boundary conditions, but the wind direction is modified by using the measured wind direction at SMEAR III. - 9 June 2017 evening: * 0609_evening: use modelled boundary conditions for meteorology and air pollutants * 0609_evening_allmet_smear: use measured boundary conditions for meteorology and aerosol size distribution * precursor_0609_evening: precursor with modelled boundary conditions for meteorology * precursor_0609_evening_allmet: precursor with measured boundary conditions for meteorology - 12 December 2017 morning: * 1207_morning: use modelled boundary conditions for meteorology and air pollutants * 1207_morning_allmet_smear: use measured boundary conditions for meteorology and aerosol size distribution * precursor_1207_morning: precursor with modelled boundary conditions for meteorology * precursor_1207_morning_allmet: precursor with measured boundary conditions for meteorology Data output are separately for the root (no suffix), parent (suffix _N02) and child (_N03) domain. The content is following: - INPUT: Input data to runt the simulations * <run_identifier>_chemistry: emission data for gases * <run_identifier>_dynamic: initialisation and forcing data for meteorological variables and air pollutants * <run_identifier>_p3d: parameter file for model steering <run_identifier>_salsa: emission data for aerosol particles * <run_identifier>_static: topography information - MONITORING: Simulation performance information * <run_identifier>_cpu: information on the CPU time consumed * <run_identifier>_header: information about the selected model parameters * <run_identifier>_rc: time step control output - OUTPUT: Output data * <run_identifier>_av_masked_N03_M01.nc: temporally-averaged wind speed data close to the ground * <run_identifier>_av_masked_N03_M04.nc: temporally-averaged aerosol particle concentration data close to the ground * <run_identifier>_av_masked_N03_M05.nc: temporally-averaged gas concentration data close to the ground * <run_identifier>_av_masked_N03_M06.nc: temporally-averaged aerosol particle concentration data in a vertical column next to the air quality monitoring station on Mäkelänkatu * <run_identifier>_av_masked_N03_M07.nc: temporally-averaged aerosol particle concentration data in a vertical column on the other side of the street from the air quality monitoring station on Mäkelänkatu * <run_identifier>_av_xy.nc: temporally-averaged meteorological data on xy-cross sections for the root domain * <run_identifier>_av_xy_N02.nc: temporally-averaged meteorological data on xy-cross sections for the parent domain * <run_identifier>_av_xy_N03.nc: temporally-averaged meteorological data on xy-cross sections for the child domain * <run_identifier>_av_xz.nc: temporally-averaged meteorological data on xz-cross sections for the root domain * <run_identifier>_av_xz_N02.nc: temporally-averaged meteorological data on xz-cross sections for the parent domain * <run_identifier>_av_xz_N03.nc: temporally-averaged meteorological data on xz-cross sections for the child domain * <run_identifier>_av_yz.nc: temporally-averaged meteorological data on yz-cross sections for the root domain * <run_identifier>_av_yz_N02.nc: temporally-averaged meteorological data on yz-cross sections for the parent domain * <run_identifier>_av_yz_N03.nc: temporally-averaged meteorological data on yz-cross sections for the child domain * <run_identifier>_av_masked_N03_M02.nc: instantaneous wind data in a 4 m x 4 m box at the north-west corner of the measurement container on Mäkelänkatu * <run_identifier>_av_masked_N03_M03.nc: instantaneous wind data in a 4 m x 4 m box at the south-east corner of the measurement container on Mäkelänkatu * <run_identifier>_av_masked_N03_M08.nc: instantaneous aerosol particle concentration data close to the ground * <run_identifier>_av_masked_N03_M09.nc: instantaneous gas concentration data close to the ground * <run_identifier>_pr.nc: temporally-averaged vertical profile data on meteorological variables for the root domain * <run_identifier>_pr_N02.nc: temporally-averaged vertical profile data on meteorological variables for the parent domain * <run_identifier>_pr_N03.nc: temporally-averaged vertical profile data on meteorological variables for the child domain * <run_identifier>_ts.nc: flow statistics data for the root domain * <run_identifier>_ts_N02.nc: flow statistics data for the parent domain * <run_identifier>_ts_N03.nc: flow statistics data for the child domain - OUTPUT_low_LAD: Same output data for simulations with a smaller default LAD value (LAD=0.375 m2/m3 in June and LAD=0.075 m2/m3 in December) See the PALM model webpage (https://palm.muk.uni-hannover.de) for details.

2020