globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.atmosres.2018.08.029
Scopus ID: 2-s2.0-85053561604
Aerosol vertical distribution and optical properties of different pollution events in Beijing in autumn 2017
Author: Sheng Z.; Che H.; Chen Q.; Xia X.; Liu D.; Wang Z.; Zhao H.; Gui K.; Zheng Y.; Sun T.; Li X.; Liu C.; Wang H.; Wang Y.; Zhang X.
Source Publication: Atmospheric Research
ISSN: 1698095
Publishing Year: 2019
Volume: 215
pages begin: 193
pages end: 207
Language: 英语
Keyword: Aerosol vertical distribution ; Beijing ; Lidar ; Optical properties ; Sun photometer
Scopus Keyword: Aerosols ; Air quality ; Boundary layer flow ; Boundary layers ; Depolarization ; Dust ; Meteorology ; Optical radar ; Photometers ; Photometry ; Wind ; Beijing ; Characteristics of pollution ; Long distance transmission ; Meteorological condition ; Single scattering albedo ; Sun photometers ; Vertical distributions ; Volume size distribution ; Optical properties ; aerosol ; albedo ; atmospheric pollution ; autumn ; boundary layer ; lidar ; metropolitan area ; optical property ; photometer ; vertical distribution ; Beijing [China] ; China
English Abstract: As one of the largest metropolitan areas in the world, Beijing has a high aerosol loading. Although the government has taken various measures to reduce emissions, the large-scale and intermittent occurrence of pollution is still a major issue. To understand the mechanisms and characteristics of pollution, Raman-Mie lidar and CE-318 sun photometer were used to study the aerosol vertical distribution and optical properties during dust, haze and clean periods in Beijing that occurred in September to October 2017. Combined with meteorological data, the sources and transmission paths of the pollution events were analyzed. The results are as follows. For the dust event, irregular particles with a large linear particle depolarization ratio played a leading role. The aerosol boundary layer height reached 3.5 km. The volume concentration of coarse particles was obviously larger in the volume size distribution. Strong northwest winds at high altitudes cause high-altitude long-distance transmission of pollutants. And this process can exacerbate air quality of Beijing. For the haze event, high-spherical water-soluble particles were dominant. The extinction coefficient exceeded 1 km−1 while the linear particle depolarization ratio was relatively small. The aerosol boundary layer height was <1 km. The range of aerosol optical depth at 440 nm varied between 0.8 and 2.4. Compared with the dust process, meteorological conditions contribute differently to the haze pollution. Aerosols from the south-west is one of the major resources of haze in Beijing. Combined with static weather such as low wind speed, the pollution level can be continuously increased. During the clean period, favorable weather conditions, such as high wind speed, provided good conditions for the diffusion of local particles. The extinction coefficient and the linear particle depolarization ratio were significantly lower. The single-scattering albedo fluctuated between 0.75 and 0.85, the scattering of light was weak and the visibility was generally high. © 2018 Elsevier B.V.
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Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: Plateau Atmospheric and Environment Laboratory of Sichuan Province, College of Atmospheric Science, Chengdu University of Information Technology, Chengdu, 610225, China; State Key Laboratory of Severe Weather (LASW), Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Laboratory for Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; School of Geoscience University of Chinese Academy of Science, Beijing, 100049, China; Center of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, CAS, Hefei, 230031, China; Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, 110016, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters and Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, 210044, China; School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, 454000, China

Recommended Citation:
Sheng Z.,Che H.,Chen Q.,et al. Aerosol vertical distribution and optical properties of different pollution events in Beijing in autumn 2017[J]. Atmospheric Research,2019-01-01,215
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