globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117269
论文题名:
The vertical profiles of carbonaceous aerosols and key influencing factors during wintertime over western Sichuan Basin, China
作者: Yin D.; Zhao S.; Qu J.; Yu Y.; Kang S.; Ren X.; Zhang J.; Zou Y.; Dong L.; Li J.; He J.; Li P.; Qin D.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223
语种: 英语
英文关键词: Agglomeration ; Lithium compounds ; Organic carbon ; Pollution control ; Wind ; Carbonaceous aerosol ; HYSPLIT ; Sichuan Basin ; Tibetan Plateau ; Vertical profile ; Aerosols ; carbon ; organic carbon ; aerosol ; agglomeration ; atmospheric pollution ; concentration (composition) ; emission ; numerical model ; trajectory ; vertical distribution ; vertical profile ; wind velocity ; aerosol ; air pollution ; air quality ; air temperature ; altitude ; Article ; dispersion ; humidity ; k means clustering ; meteorology ; particulate matter ; persistent organic pollutant ; priority journal ; vapor pressure ; winter ; China ; Qinghai-Xizang Plateau ; Sichuan Basin
学科: Carbonaceous aerosols ; HYSPLIT ; Sichuan basin ; Tibetan plateau ; Vertical profiles
中文摘要: With Tibetan Plateau higher than 4 km to the west, the location of Sichuan Basin is unique all around the world and provides a good platform to study air pollution in the urban agglomerations over the complex terrain. To fill in the blanks on vertical distributions of PM1 (the particles smaller than 1 μm) and carbonaceous aerosols within the basin, by means of high topographic relief, PM1 were off-line sampled during 20 January to 2 February 2018 at eight sites with increasing altitudes from the basin to southeastern margins of the Tibetan Plateau. The regional potential sources for each site were revealed by HYbrid-Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model and concentration-weighted trajectory (CWT) method. The lowest carbonaceous aerosol levels occurred at Lixian, while the highest OC (organic carbon) (EC, elemental carbon) was at Hongyuan (the altitude of 3500 m) (Ande, a rural site) due to more primary emissions. The pollutants inside the basin can be transported the altitudes from 2 km to 3 km by vertical dispersion, but they cannot be dispersed to higher altitudes. The vertical stratification of the pollutants was obvious and easily formed “high-low-high” pattern from Sichuan Basin to southeastern Tibetan Plateau, especially during highly polluted episodes. The regional potential sources significantly varied as the increased altitudes. Regional pollution was significant inside the basin. The sources at the altitudes from 2 km to 3 km originated from southeastern margins of the Plateau and surrounding cities, while those at higher altitudes were transported from southeastern margins of the Plateau. The impact of basic meteorological variables (temperature, wind speed and vapor pressure) on carbonaceous aerosols was opposite between the basin and Plateau sites. This study was essential to understanding formation mechanisms of severe pollution episodes and thus to making control measures for the urban agglomerations inside the mountainous terrain. © 2020 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160977
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作者单位: Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; CAS Centre for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; Maerkang Meteorological Bureau, Maerkang, 624000, China; Lixian Meteorological Bureau, Lixian, 624000, China; State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China

Recommended Citation:
Yin D.,Zhao S.,Qu J.,et al. The vertical profiles of carbonaceous aerosols and key influencing factors during wintertime over western Sichuan Basin, China[J]. Atmospheric Environment,2020-01-01,223
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