GEOS-Chem model output for diagnosing sources of fine particles (PM2.5) in UK cities

Data are monthly and annual mean total and components of PM_2.5 over the UK in the lowest model layer for comparison to surface concentrations of PM2.5 and assessment of air quality in the UK and in target cities (Leicester, London, Birmingham). <br> Specifically, these are the PM_2.5 mass concentrations obtained with all natural and anthropogenic sources (appended as *_all-sources.nc). These include total PM_2.5 (*-total-pm25-*), black carbon (*-bc-*), ammonium (*-nh4-*), aerosol nitrate (*-no3-*), organic carbon (*-oc-*), and sulfate (*-so4-*). <br> Output also includes model values obtained after taking the difference between a simulation with all sources and multiple simulations with individual source contributors turned off. These sensitivity simulations include UK national emissions of agricultural ammonia (geos-chem-pm25-agr-only.nc), UK national emissions of anthropogenic dust (geos-chem-uk-anthrop-dust-only.nc), continental Europe anthropogenic emissions (geos-chem-uk-europe-only.nc), global natural dust emissions (geos-chem-uk-pm25-global-natural-dust-only.nc), global ship emissions (geos-chem-uk-pm25-global-ships-only.nc), all emission sources in Leicester (geos-chem-uk-pm25-Leicester-only.nc), all emission sources in Leicestershire county (geos-chem-uk-pm25-Leicestershire-only.nc), all emissions in London and Birmingham (geos-chem-London-Bham-only.nc), and UK national traffic tailpipe emissions (geos-chem-uk-pm25-traffic-only.nc). <br>