Impact of long-range transport of aerosols on the PM2.5 composition at a major metropolitan area in the northern Kyushu area of Japan
Impact of long-range transport of aerosols on the PM2.5 composition at a major metropolitan area in the northern Kyushu area of Japan
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DOI：
10.1016/j.atmosenv.2014.01.029
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发表时间：
2014-11-01
影响因子：
5
通讯作者：
Hatakeyama, Shiro
中科院分区：
文献类型：
--
作者：
Kaneyasu, Naoki;Yamamoto, Shigekazu;Hatakeyama, Shiro
鉴于东亚区域，特别是中国最近经济迅速增长，能源消耗随之而来，人们对排放的颗粒污染物对人类健康的影响十分关注。因此，我们调查了气溶胶的长距离传输对城市空气质量的影响，在上风地区的日本，通过比较的PM2.5成分收集了多年的福冈，一个代表性的大都会在九州地区，并在上江岛，位于福冈西南190公里。福冈和福冈的PM2.5日平均浓度几乎相同。PM2.5浓度在这些网站占主导地位的硫酸盐和颗粒有机物，其波动模式相似，除了在温暖的季节有机物。与此相反，硝酸盐和元素碳的网站之间的差异很大。此外，福冈市土壤中Pb/Zn和Cd/Pb比值与北京市报告值接近。本研究中测量的福冈非海盐硫酸盐浓度和过去的测量报告显然与最近的排放清单中报告的中国SO2排放的年代际变化相吻合。因此，我们的结论是，即使在一个大城市福冈，在九州地区的北方部分的PM2.5浓度主要是由流入的远程传输气溶胶全年，除了在夏季，而不是本地的空气污染排放在每个站点。(C)2014爱思唯尔有限公司版权所有。
In view of the recent rapid economic growth and accompanying energy consumption in the East Asian region, particularly in China, there is much concern about the effects of emitted particulate pollutants on human health. We have thus investigated the impact of long-range transport of aerosols on urban air quality in the upwind areas of Japan by comparing the PM2.5 composition collected for multiple years in Fukuoka, a representative metropolis in the Kyushu area, and in Fukue Island, located 190 km southwest of Fukuoka. Daily averaged PM2.5 concentrations in Fukuoka and Fukue were almost identical. PM2.5 concentrations at these sites were dominated by sulfate and particulate organics, and their fluctuation patterns were similar except for organics in the warm season. In contrast, those of nitrate and elemental carbon differed substantially between the sites. In addition, the ratios of Pb/Zn and Cd/Pb in Fukuoka were close to the reported values in Beijing. Non-sea-salt sulfate concentration in Fukuoka measured in this study and reported in the past measurements apparently coincided with the decadal SO2 emission change in China reported in a recent emission inventory. Therefore, we conclude that even in a city as large as Fukuoka, the PM2.5 concentration in the northern part of the Kyushu area is primarily dominated by the inflow of long-range transported aerosols throughout the year, except in the summer, rather than local air pollution emitted at each site. (C) 2014 Elsevier Ltd. All rights reserved.