Analysis of contribution of oxidants from various sources to the wide area air pollution by isotope chemistry

对2010-2012年春季在九州北部观测到的空气污染进行了研究，重点是其环境动态和对人类健康的不利影响。据调查，日本西部地区的大气环境正在恶化，因此，最近从早春到雨季，不仅是城市，其他地方也经常出现雾霾。空气污染物包括一些化学物质、黄沙和花粉。这些化合物的联合作用可能会增加鼻炎、过敏和呼吸系统疾病的患者。最重要的是，在2010年5月20日和21日，九州北部被浓雾覆盖，这被认为是从亚洲大陆带来的。由于能见度低，这场雾给火车和飞机带来了交通混乱。在这一时期检测出了黑碳、硫酸盐、铅、臭氧和苯等人为成分。1945年在洛杉矶也观察到类似的烟雾。我们还首次发现了之前暴露在空气污染物中的黑色黄沙。

Air pollution which observed in spring of 2010-2012 in the northern Kyushu was studied, focusing on its environmental dynamics and adverse health effects on humans. Atmospheric environment in the western Japan was found to be worsening, so that recently a haze was pretty often observed over not only cities but also other places from early spring to rainy season. Air pollutants contained are some chemicals, yellow-sand and pollens. The combined effect of those compounds was feared to increase rhinitis patients, allergic and respiratory diseases. Above all on May 20 and 21 in 2010, the northern Kyushu was covered with a dense fog which was assumed to be carried from the Asian Continent. This fog brought about traffic turmoil in trains and flights due to the poor visibility. The anthropogenic components such as black carbon, sulfate, lead, ozone and benzene were detected on this period. The similar smog was observed in Los Angeles in 1945.We also identified for the first time that black-colored yellow-sand which had previously been exposed to air pollutants.