Assessment of WRF/Chem PM2.5 forecasts using mobile and fixed location data from the Fairbanks, Alaska winter 2008/09 field campaign

PM2.5 concentrations measured by two different devices at the same site indicate that measurement errors at extremely low temperatures and humidities explain up to 24% of the normalized mean error. Some discrepancies can be attributed clearly to errors in emissions, chemical boundary conditions and meteorology.