Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-3919-2018 |
Observational analyses of dramatic developments of a severe air pollution event in the Beijing area | |
Li, Ju1; Sun, Jielun2; Zhou, Mingyu3; Cheng, Zhigang1; Li, Qingchun1; Cao, Xiaoyan1; Zhang, Jingjiang1 | |
2018-03-20 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:6页码:3919-3935 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | A rapid development of a severe air pollution event in Beijing, China, at the end of November 2015 was investigated with unprecedented observations collected during the field campaign of the Study of Urban Rainfall and Fog/Haze (SURF-15). Different from previous statistical analyses of air pollution events and their correlations with meteorological environmental conditions in the area, the role of turbulent mixing in the pollutant transfer was investigated in detail. The analyses indicate that the major pollution source associated with high particulate matter of diameter 2.5 mu m (PM2.5) was from south of Beijing. Before the day of the dramatic PM2.5 increase, the nighttime downslope flow from the mountains to the west and north of Beijing reduced the surface PM2.5 concentration northwest of Beijing. The nighttime surface stable boundary layer (SBL) not only kept the relatively less-polluted air near the surface, it also shielded the rough surface from the pollutant transfer by southwesterly winds above the SBL, leading to the fast transport of pollutants over the Beijing area at night. As the daytime convective turbulent mixing developed in the morning, turbulent mixing transported the elevated polluted air downward even though the weak surface wind was from northeast, leading to the dramatic increase of the surface PM2.5 concentration in the urban area. As a result of both turbulent mixing and advection processes with possible aerosol growth from secondary aerosol formation under the low-wind and high-humidity conditions, the PM2.5 concentration reached over 700 mu gm(-3) in the Beijing area by the end of the day. Contributions of the two transporting processes to the PM2.5 oscillations prior to this dramatic event were also analyzed. The study demonstrates the important role of large-eddy convec-tive turbulent mixing in vertical transfer of pollutants and the role of the SBL in not only decoupling vertical transport of trace gases and aerosols but also in accelerating horizontal transfer of pollutants above. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427962300004 |
WOS关键词 | LAYER METEOROLOGICAL FACTORS ; SEVERE HAZE POLLUTION ; PARTICULATE MATTER ; BACKGROUND SITES ; JANUARY 2013 ; CHINA ; WINTER ; URBAN ; EPISODE ; SIMULATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/15133 |
专题 | 地球科学 |
作者单位 | 1.China Meteorol Adm, Inst Urban Meteorol, Beijing 100089, Peoples R China; 2.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 3.Natl Marine Environm Forecast Ctr, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Ju,Sun, Jielun,Zhou, Mingyu,et al. Observational analyses of dramatic developments of a severe air pollution event in the Beijing area[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(6):3919-3935. |
APA | Li, Ju.,Sun, Jielun.,Zhou, Mingyu.,Cheng, Zhigang.,Li, Qingchun.,...&Zhang, Jingjiang.(2018).Observational analyses of dramatic developments of a severe air pollution event in the Beijing area.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(6),3919-3935. |
MLA | Li, Ju,et al."Observational analyses of dramatic developments of a severe air pollution event in the Beijing area".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.6(2018):3919-3935. |
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