دورية أكاديمية
Source areas and chemical composition of fine particulate matter in the Pearl River Delta region of China
| العنوان: | Source areas and chemical composition of fine particulate matter in the Pearl River Delta region of China |
|---|---|
| المؤلفون: | Hagler, G. S. W., Bergin, M. H., Salmon, L. G., Yu, J. Z., Wan, E. C. H., Zheng, M., Zeng, L. M., Kiang, C. S., Zhang, Y. H., Lau, A. K. H., Schauer, J. J. |
| المساهمون: | Hagler, GS (reprint author), Georgia Inst Technol, Sch Civil & Environm Engn, 311 Ferst Dr, Atlanta, GA 30332 USA., Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA., Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA., CALTECH, EQL, Pasadena, CA 91125 USA., Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China., Peking Univ, State Key Joint Lab Environm Simulat & Pollut Con, Coll Environm Sci, Beijing 100871, Peoples R China., Hong Kong Univ Sci & Technol, Ctr Coastal & Atmospher Res, Kowloon, Hong Kong, Peoples R China., Univ Wisconsin, Madison, WI 53706 USA., Georgia Inst Technol, Sch Civil & Environm Engn, 311 Ferst Dr, Atlanta, GA 30332 USA. |
| المصدر: | SCI ; EI |
| بيانات النشر: | 大气环境 |
| سنة النشر: | 2006 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Pearl River Delta region, PM2.5, chemical composition, source regions, transport, HONG-KONG, ANTHROPOGENIC AEROSOLS, ATMOSPHERIC AEROSOLS, ELEMENTAL CARBON, ORGANIC-CARBON, AIRBORNE LEAD, CLIMATE, PM10, AIR |
| الوصف: | Fine particulate matter (PM2.5) was measured for 4 months during 2002-2003 at seven sites located in the rapidly developing Pearl River Delta region of China, an area encompassing the major cities of Hong Kong, Shenzhen and Guangzhou. The 4-month average fine particulate matter concentration ranged from 37 to 71 mu g m(-3) in Guangdong province and from 29 to 34 mu g m(-3) in Hong Kong. Main constituents of fine particulate mass were organic compounds (24-35% by mass) and sulfate (21-32%). With sampling sites strategically located to monitor the regional air shed patterns and urban areas, specific source-related fine particulate species (sulfate, organic mass, elemental carbon, potassium and lead) and daily surface winds were analyzed to estimate influential source locations. The impact of transport was investigated by categorizing 13 (of 20 total) sampling days by prevailing wind direction (southerly, northerly or low wind-speed mixed flow). The vicinity of Guangzhou is determined to be a major source area influencing regional concentrations Of PM2.5, with levels observed to increase by 18-34 mu g m(-3) (accounting for 46-56% of resulting particulate levels) at sites immediately downwind of Guangzhou. The area near Guangzhou is also observed to heavily impact downwind concentrations of lead. Potassium levels, related to biomass burning, appear to be controlled by sources in the northern part of the Pearl River Delta, near rural Conghua and urban Guangzhou. Guangzhou appears to contribute 5-6 mu g m(-3) of sulfate to downwind locations. Guangzhou also stands out as a significant regional source of organic mass (OM), adding 8.5-14.5 mu g m(-3) to downwind concentrations. Elemental carbon is observed to be strongly influenced by local sources, with highest levels found in urban regions. In addition, it appears that sources outside of the Pearl River Delta contribute a significant fraction of overall fine particulate matter in Hong Kong and Guangdong province. This is evident in the relatively high PM2.5 ... |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 1352-2310 |
| العلاقة: | ATMOSPHERIC ENVIRONMENT.2006,40,(20),3802-3815.; 979048; http://hdl.handle.net/20.500.11897/252057Test; WOS:000238588600015 |
| DOI: | 10.1016/j.atmosenv.2006.02.032 |
| الإتاحة: | https://doi.org/20.500.11897/252057Test https://doi.org/10.1016/j.atmosenv.2006.02.032Test https://hdl.handle.net/20.500.11897/252057Test |
| رقم الانضمام: | edsbas.BBD285EB |
| قاعدة البيانات: | BASE |
| تدمد: | 13522310 |
|---|---|
| DOI: | 10.1016/j.atmosenv.2006.02.032 |