@article{oai:nagoya.repo.nii.ac.jp:00010220, author = {Moriizumi, Jun and Ohkuraa, Takehisa and Hirao, Shigekazu and Nono, Yuki and Yamazawa, Hiromi and Kim, Yoon-Shin and Guo, Qiuju and Mukai, Hitoshi and Tohjima, Yasunori and Iida, Takao}, issue = {1}, journal = {AIP Conference Proceedings}, month = {Aug}, note = {Continuous observation of atmospheric radon-222 (^222Rn) concentration has been operated for years in China, Korea and Japan, including remote islands isolated in the ocean. The sites were allocated along main wind directions of monsoon from the continent to the ocean in winter and yellow dust storm in spring. Higher levels of ^222Rn concentrations with typical diurnal variation with early morning maxima were observed on the continent, while lower levels with no diurnal variation at remote islands. Seasonal variations with summer minima and winter maxima commonly obtained, and they suggested contribution of ^222Rn originated from the continent to atmospheric ^222Rn over the remote islands. A backward trajectory analysis showed clear relationship between variation in wind field and in ^222Rn concentration at Hachijo Is., Japan, and proved availability of the observation for analysis of atmospheric transport in East Asia.}, pages = {181--184}, title = {Continuous Atmospheric Radon-222 Concentration Observation in East Asia}, volume = {1034}, year = {2008} }