The Study On The Temporal And Spatial Distribution Of Black Carbon Aerosol In China

The temporal and spatial distribution of black carbon aerosol over China was studied by using a three-dimension Transport Model as the first time of this kind of work in China. The simulation result was compared with observation data of several observation sites, and the dry/wet deposition effects was discussed. The results showed the highest black carbon concentration in winter and lowest in summer with North China, East China and Sichuan Basin as the highest black carbon concentration areas over boundary layer. The comparison of observation data with the model simulation result showed the reasonability of the model. Wet deposition has an important effect on the simulation result.The observation of black carbon was made at Shangdianzi regional GAW station to study its variation characteristics, the influences of long range transportation and of wet deposition. The seasonality of black carbon concentration showed the highest in autumn. The diurnal variation showed high concentration in nighttime, low in daytime, and the lowest in noontime, with pronounced increasing at sunrise/sunset period. The analysis also indicated influences of the long range transportation from high-populated areas in North China on the black carbon concentration at Shangdianzi, with most obvious one from the southwest.