亞洲大氣污染物之整合監測與其對環境及氣候之衝擊研究-國際參與(II)-高低海拔測站大氣汞分布與影響機制比較(總計畫及子計畫四)

East, Southeast and South Asia is the major atmospheric mercury (Hg) emissionsource region, contributing nearly half of the global anthropogenic Hg emissions.Biomass burning also has been identified as an important emission source ofatmospheric Hg and Indonesia and the Indochina Peninsula are major biomassburning regions contributing about 37% of the global biomass burning Hgemissions. Additionally, the trans-boundary transport events of Asian dust andChinese haze can be accompanied by the export of Hg to influence Taiwan.Taiwan is located in the East Asian monsoon region and hence theconcentrations and distribution of atmospheric Hg in low-altitude area can beinfluenced by the winter and summer monsoon. On the other hand, westerlyprevails in mountain areas with altitude higher than 1500 m. As such, thecharacteristics of atmospheric Hg concentration and distribution, and the sourcereceptorrelationships could be different between low and high altitude areas,which need further study. This research project is hence proposed to characterizethe speciation and distribution of atmospheric Hg associate with different regionalpollutant transport types, to study the physical and chemical transformation of Hgspeciation during transport, and to study the influence of trans-boundarytransported atmospheric Hg to sites of different altitudes in Taiwan. Throughregional international collaboration, measurements of atmospheric Hg, manuallycollected gaseous oxidized Hg, and size-segregated particle-bound Hg will beconducted at sites in the source region (Thailand, Vietnam, Indonesia or thePhilippines) and/or the downwind receptor sites in Taiwan (such as TaipingIsland, Dongsha Island, Cape Fuguei, Mt. Bamboo, Jhongli, Mt. Lulin, orHengchun). Meteorological information and data of atmospheric radiation andother air pollutants will be integrated with the Hg data for detail analyses anddiscussion.