At recent years, acid rain and transboundary air pollution problems become to be key issues in the East Asian atmospheric environment. Many studies such as trajectory analysis, nationwide monitoring, measurement of gas and aerosol components, aircraft observations etc. are performed to investigate these phenomenon. With these studies, outlines of spatial distributions and temporal variations of basic pollutants and rain acidity were reported.
Nevertheless, acid rain and transboundary air pollution problems have much mistakes and uncertainty in data analysis such as doposition (wet and dry) rates, reaction rates, time and spatial resolution and emission invetories, which might give rise to a serious trouble in policy making and public concerns.
I'd like to introduce some case studies concerning to these prblems and point out the overestimation or uncertainty. These discussions are not directed to deny the fact of transboundary air pollution, but focused to search what is really NGOs' role to improve atmospheric environment.
Moreover I would like to present the results of broadcast simultaneous measurement of NO2 with Amaya type capsule sampler in Korea. NO2 is major air pollutants in automobile ages, and precursors of photochemical oxidants and acid rain. In Korea, total six nationwide measurement has been carried out by citizen's voluntary participation every 6 months since 1993.Each time, data at 2,000-10,000 sites are collected and it is possible to analyze the pollution conditions over the country and display air pollution map.
Now, I'd like to suggest one of the AANEA(Atmosphere Action Network East Asia)'s action plan concernig to transboundary air pollution. That is the acid rain monitoring plan (and/or NO2, SO2 measurements) over the East Asia. Through these actions, we are expected to analyze the spatial distributions of air pollution and overcome the uncertainty of transboundary air pollution. In recent years, environmental problems relating to the quality of life is emphasized, perhaps most important. I wonder a little possibility that transboundary problems shall miss local episodic air pollution, risk assessment about human health and so on. Now it is time to remind the saying that "Think Globally, Act locally" in NGOs' movement.