International research on the transboundary air pollution in East Asia

本研究以东亚地区的跨境空气污染为研究对象。在韩国（济州岛）和日本（长崎和冲绳）采集了空气样本。冬季采集的空气样本中多环芳烃浓度高于其他季节。同种样品的毒性（遗传毒性和急性毒性）在冬季也较高。反轨迹分析表明，长崎冬季收集的气团来源于中国西北地区。这些结果表明，多环芳烃（PAHs）是造成污染的有毒物质之一，它们起源于中国东北地区。然而，多环芳烃对总毒性的贡献率最多为10%左右，需要对跨境空气中含有的其他毒物进行研究。

This study focused on the transboundary air pollution in East Asia. Air samples were collected both in Korea(Jeju island) and Japan(Nagasaki and Okinawa). PAHs concentration in the air samples collected in winter were higher than those collected in other seasons. Toxicity(genotoxicity and acute toxicity) of the same samples were also higher in winter. Backtrajectory analysis revealed the air mass collected in Nagasaki in winter was originally from northwest China. These results suggest that PAHs was one of the causative toxicants and they originated in northeast China. However, contribution rate of PAHs to total toxicity was about 10% at most, it will be need to search another toxicants contained in transboundary air.