DOI: 10.1016/j.atmosenv.2015.10.045
Scopus记录号: 2-s2.0-84945255291
论文题名: Characteristics of the long-range transport dust events in Chengdu, Southwest China
作者: Chen Y ; , Luo B ; , Xie S ; -D
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 713
结束页码: 722
语种: 英语
英文关键词: Chengdu
; Dust event
; Indicators
; PM
; Transport
Scopus关键词: Air quality
; Atmospheric aerosols
; Dust
; Indicators (instruments)
; Landforms
; Magnesium
; Pollution
; Promethium
; Sulfur dioxide
; Aerosol optical depths
; Chengdu
; Dust event
; Enrichment factors
; Long range transport
; Pollution patterns
; Qinghai Tibet plateau
; Transport
; Air pollution
; calcium
; magnesium
; aerosol
; air quality
; concentration (composition)
; desertification
; dust
; long range transport
; nitrogen dioxide
; optical depth
; sulfur dioxide
; air quality
; Article
; chemical composition
; China
; controlled study
; desert
; dust
; haze
; online monitoring
; particulate matter
; pollution
; priority journal
; remote sensing
; simulation
; Chengdu
; China
; Qinghai-Xizang Plateau
; Sichuan
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Chengdu is an inland megacity in the Sichuan Basin, where dust influence remained an open question. During a one-year haze campaign, two dust events were identified in March 2013, indicating that desert dust can be transported to Chengdu and impacted local air quality strongly. The suggested low SO2/PM10, NO2/PM10 and PM2.5/PM10 ratios of 0.15, 0.27 and 0.40 could be used as immediate indicators for dust days. On typical dust day of March 12, PM10 was as high as 359.1 μg m-3, and crustal matter contributed 80.5% to total PM2.5 mass (106.6 μg m-3). Enrichment factors of most elements have decreased due to the dilution effect except for Ca and Mg. The dust was mainly from western and northern dust regions in China, including the "Northerly Mongolia Path", "Western Desert Path" and "Northwestern Desert Path". Due to the obstruction of Qinghai-Tibet Plateau on the west, the dust air to Chengdu was mostly from the northeastward direction after passing over Qinling Mountain. Moreover, the air experienced obvious elevation from its source regions driven by the cold front synoptic pattern. The spatial distribution of high AOD (Aerosol Optical Depth) values over 1.2 but low Ångström exponent of 0.5-0.6 around Chengdu verified the coarse pollution patterns. However, the dust pollution was not serious in nearby Chongqing and Guizhou and exhibited weak regional feature, a result different from those in Beijing and Shanghai. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81360
Appears in Collections: 气候变化事实与影响
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作者单位: College of Environmental Science and Engineering, Peking University, No. 5 Yiheyuan Rd, Haidian District, Beijing, China; School of Safety and Environmental Engineering, Capital University of Economics and Business, No. 121 Zhangjialukou Rd, Fengtai Disctrict, Beijing, China; Sichuan Environmental Monitoring Center, No. 88 3rd East Guanghua Rd, Qingyang District, Chengdu, China
Recommended Citation:
Chen Y,, Luo B,, Xie S,et al. Characteristics of the long-range transport dust events in Chengdu, Southwest China[J]. Atmospheric Environment,2015-01-01,122