Transport of black carbon aerosols from non-local sources: A case study in Shanghai |
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| Institution: | 1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China;2. Shanghai Meteorological Service, Shanghai 200030, China;3. Shanghai Key Laboratory of Meteorology and Health, Shanghai 200135, China;1. Department of Physics, University of Oviedo, C/ Calvo Sotelo, s/n, E-33007 Oviedo, Spain;2. Institute of Technology for Nanostructures (NST) and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Bismarckstr. 81, D-47057 Duisburg, Germany;1. Rural Environment Protection Engineering & Technology Center of Sichuan Province, College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China;2. Meishan Environmental Monitoring Center, Meishan 620020, China;1. Shanghai Meteorological Service, 166 Puxi Road, Shanghai 200030, China;2. Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, 216 Ningliu Road, Nanjing 210044, China;3. Computer Science Department, Oklahoma State University, Stillwater, OK 74078, USA;4. Shanghai Key Laboratory of Meteorology and Health (Shanghai Meteorology Service), 951 Jinxiu Road, Shanghai 200135, China;5. Department of Environmental Science & Engineering, Fudan University, 220 Handan Road, Shanghai 200433, China;1. Department of Biomedical Engineering, Auburn Science and Engineering Center, The University of Akron, West Tower #275, Akron, OH 44325, USA;2. Akron General Hospital, Suite 240, 244 W. Exchange Street, Akron, OH 44302, USA |
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| Abstract: | Black carbon (BC) aerosol mass carried by winds of varying directions from non-local sources was estimated based on hourly measured data of BC mass concentration (CBC) and meteorological parameters from January 2008 to December 2012 in Shanghai, and the relationship between annual average CBC and wind speed was analyzed. The results show that the annual average CBC decreased with wind speed for speeds exceeding 0.3 m/s. The relationship between the two was determined by a linear fit with correlation coefficient 0.88. Assuming BC aerosol mass of non-local sources transported by a southeast wind was zero, annual average BC concentrations (μg/m3) carried by winds of variable direction were 1.99 (southwest), 1.95 (west), 1.15 (northwest), 0.54 (south), 0.39 (north), 0.01 (northeast), and 0.01 (east). BC aerosol mass of non-local sources transported by wind to Shanghai was about 6404.05 t per year, among which the total contribution of southwest, west, and northwest winds was nearly 84%. The aerosol mass transported to Shanghai in winter accounted for 35% that of the entire year, and was greater than that of the other seasons. |
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| Keywords: | Black carbon aerosol Non-local source Mass concentration Wind speed Wind direction |
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