研究期間：10108~10207;The rapid development in East Asia in the last decade has aroused concerns on the increasing amount of anthropogenic pollutants being injected into this region altering baseline conditions of air quality and climate. Situating on the rim of west Pacific facing east China, Taiwan can serve as an ideal location for monitoring the change in concentration and composition of key species. Due to the lack of systematic background observations in the past in this geophysical region surrounding Taiwan, the impact on the regional air quality and climate brought about by either the continental outflow from China or the biomass burning from Southeast Asia deserve in depth assessments. As a result, a high mountain (2862 m) background station (Lulin atmospheric baseline station; LABS) was established in 2006 in central Taiwan, monitoring ambient concentrations of key pollutants such as CO, CFCs, and O3. In this proposal, green house gases will be added including CO2 and CH4 to better address the climate issues. To further facilitate the understanding of the mechanism of long range transport, in this research, we propose to establish TAQM simulations to evaluate the impact levels on the inflows of polluted air masses arise by Asian continental outflows and/or biomass burning from SE Asia. Meanwhile, measurement of key species at other remote sites, e.g. Kenting and Dongsha, to investigate the land-sea exchange of air parcels and the effect of long range transport on the air quality of southern Taiwan. Measurements of O3, CO, and key greenhouse gases, etc. will shed light to the understanding of these intriguing issues.