Number concentration and size distribution of ultrafine particles on the roadside of the Tateyama-Kurobe Alpine Route, Japan
Number concentration and size distribution of ultrafine particles on the roadside of the Tateyama-Kurobe Alpine Route, Japan
复制标题
日本立山黑部阿尔卑斯山脉路线路边超细颗粒物的数量浓度和粒径分布
DOI：
10.1080/10934529.2011.584505
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
他6名
中科院分区：
文献类型：
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作者：
Watanabe;K.;Honoki;H.;他6名
在立山-黑部阿尔卑斯山路线的西侧，用扫描迁移率粒度仪（Scanning Mobility Particle Sizer）对粒径小于100 nm的超细粒子（UFP）进行了测量。2007年夏季和2008年秋季，日本立山。直径小于50 nm的纳米颗粒（NPs）的数量浓度在上午急剧增加。这一增加与NO浓度的增加一致，NO浓度是车辆排放的良好指标。虽然NO的峰值浓度也在下午晚些时候检测到，NPs的浓度没有增加。车辆排放的UFP可能因驾驶情况而有很大差异。在高负荷条件下，NPs的排放可能会加速。10月份的NP浓度远高于8月份，尽管8月份的公共汽车比10月份多。早晨的粒径分布为双峰型，第一个峰在20-30 nm左右，第二个峰在70-80 nm左右。第一个高峰在白天变得很小。第一座山峰消失了，第二座山峰一直保留到午夜。
Measurements of ultrafine particles (UFPs) with diameters smaller than 100 nm were made with a Scanning Mobility Particle Sizer on the roadside of the Tateyama-Kurobe Alpine route on the western slope of Mt. Tateyama, Japan, in the summer and autumn of 2007 and 2008. The number concentrations of nanoparticles (NPs) with diameters smaller than 50 nm increased sharply in the morning. This increase agreed with that of the NO concentration, which is a good indicator of vehicle emissions. Although the peak concentration of NO was also detected in the late afternoon, the concentrations of NPs did not increase. The vehicle emission of UFPs may vary considerably with the driving conditions. The emission of NPs might have been accelerated under a high engine-load condition. The NP concentrations in October were much higher than those in August, although there were more buses in August than in October. The number size distribution in the morning was bimodal, with the first peak around 20–30 nm and the second one around 70–80 nm. The first peak became small during the daytime. The first peak disappeared, and a small second peak remained through midnight.