抄録
Long-range transport of the pollutants influenced by both anthropogenic and natural emission source in East Asia including the biomass burning emission in Southeast Asia was investigated by using the backward trajectory analysis from NASA TRACE-P airborne observation and a numerical simulation with three-dimensional chemical transport model (STEM-2k1). As a result, we found systematic regional bias between observed and calculated concentration. The ratios between CO and some NHMCs, such as ethane/CO and ethane/propane, were highly associated with the distribution of emission ratio in this period. We also investigated the time rate of change of the concentration of species and their ratio along the trajectory. From this analysis, the propane/ethane ratio and propane/acetylene ratio were proved to keep their emission ratio during regional transport. From the backward trajectory analysis, we also found the fact that our emission quantities from biomass burning have still some error for specific hydrocarbons. Further investigation will improve the model accuracy and potential capacity. This kind of analysis may help to determine the emission factor by observation-based inventory scheme.
