Diurnal variation of number concentration and size distribution of ultrafine particles in the urban atmosphere of beijing in winter
文献类型：期刊论文
| 作者 | Shi Zong-bo; He Ke-bin; Yu Xue-chun; Yao Zhi-liang; Yang Fu-mo; Ma Yong-liang; Ma Rui; Jia Ying-tao; Zhang Jie |
| 刊名 | Journal of environmental sciences-china
 |
| 出版日期 | 2007 |
| 卷号 | 19期号:8页码:933-938 |
| 关键词 | Fine particles Nucleation mode Aitken mode New particle formation |
| ISSN号 | 1001-0742 |
| 通讯作者 | He ke-bin(hekb@tsinghua.edu.cn) |
| 英文摘要 | Number concentration and distribution of airborne particles in the size range 5.6 to 560 nm diameter were measured in beijing for a 15-d period in winter 2005. daily average number concentrations of nucleation mode (5.6-20 nm), aitken mode (20-100 nm), and accumulation mode (100-560 run) particles, and total particles were 17500, 32000, 4000, and 53500 cm(-3), respectively. average particle size distribution was monomodal with a mode diameter of about 40 nm at night and bimodal with mode diameters of about 10 and about 40 rim during the daytime. new particle formation events, which were connected to diurnal variation of nucleation mode particles, were observed in more than half of the observation days. the events often started around 10:00-11:00 chinese standard time (cst) and ended up after 3-4 h. concentrations of aitken and accumulation mode particles increased from midnight and reached their maxima at about 10:00 cst, and then decreased and became the lowest in the afternoon. analysis of diurnal cycles in traffic volume and meteorological parameters revealed that the accumulation of the particles in aitken and accumulation modes in the morning was influenced by formation of an inversion and increase in vehicle emission, and dispersion of such particles in the afternoon was associated with more effective vertical mixing and higher wind speed. |
| WOS关键词 | ROADSIDE ATMOSPHERE ; EXHAUST DILUTION ; FINE ; AEROSOLS ; AIR ; POLLUTANTS ; CITIES ; PM2.5 ; MASS |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000248736600006 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2380499 |
| 专题 | 中国科学院大学 |
| 通讯作者 | He Ke-bin |
| 作者单位 | 1.Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China 2.TSI Asia Pacific Beijing Representat, Beijing 100084, Peoples R China 3.Grad Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi Zong-bo,He Ke-bin,Yu Xue-chun,et al. Diurnal variation of number concentration and size distribution of ultrafine particles in the urban atmosphere of beijing in winter[J]. Journal of environmental sciences-china,2007,19(8):933-938. |
| APA | Shi Zong-bo.,He Ke-bin.,Yu Xue-chun.,Yao Zhi-liang.,Yang Fu-mo.,...&Zhang Jie.(2007).Diurnal variation of number concentration and size distribution of ultrafine particles in the urban atmosphere of beijing in winter.Journal of environmental sciences-china,19(8),933-938. |
| MLA | Shi Zong-bo,et al."Diurnal variation of number concentration and size distribution of ultrafine particles in the urban atmosphere of beijing in winter".Journal of environmental sciences-china 19.8(2007):933-938. |
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来源：中国科学院大学
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