Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-13605-2017 |
Diurnal and day-to-day characteristics of ambient particle mass size distributions from HR-ToF-AMS measurements at an urban site and a suburban site in Hong Kong | |
Lee, Berto Paul1; Wang, Hao2; Chan, Chak Keung1,2 | |
2017-11-15 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Mass-concentration-based particle size distributions measured by a high-resolution aerosol mass spectrometer were systematically analyzed to assess long and short-term temporal characteristics of ambient particle size distributions sampled at a typical urban environment close to emission sources and a suburban coastal site representing a regional and local pollution receptor location in Hong Kong. Measured distributions were bi-modal and deconvoluted into sub modes, which were analyzed for day-to-day variations and diurnal variations.& para;& para;Traffic and cooking emissions at the urban site contributed substantially to particle mass in both modes, while notable decreases in mass median diameters were limited to the morning rush hour. Inorganic particle components displayed varying diurnal behavior, including nocturnal nitrate formation and daytime photo-chemical formation evident in both modes. Suburban particle size distributions exhibited notable seasonal disparities with differing influence of local formation, particularly in spring and summer, and transport which dominated in the fall season leading to notably higher sulfate and organic accumulation-mode particle concentrations. Variations in particle mixing state were evaluated by comparison of inter-species mass median diameter trends at both measurement sites. Internal mixing was prevalent in the accumulation mode in spring at the urban site, while greater frequency of time periods with external mixing of particle populations comprising different fractions of organic constituents was observed in summer. At the suburban site, sulfate and nitrate in the accumulation mode more frequently exhibited differing particle size distributions in all seasons, signifying a greater extent of external mixing.& para;& para;At the urban site, periods of greater sub-micron inorganic mass concentrations were more likely to be caused by increases in both Aitken- and accumulation-mode particle mass in summer, while at the suburban receptor location, organic and nitrate Aitken-mode particle mass contributed more regularly to higher total sub-micron species mass concentrations in most seasons (spring, summer, and winter). |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000415205400005 |
WOS关键词 | AERODYNAMIC DIAMETER MEASUREMENTS ; HIGH-RESOLUTION ; SUBMICRON PARTICLES ; PARTICULATE MATTER ; HKUST SUPERSITE ; CHEMICAL-CHARACTERIZATION ; ORGANIC AEROSOL ; MEXICO-CITY ; DENSITY CHARACTERIZATION ; SOURCE APPORTIONMENT |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28399 |
专题 | 地球科学 |
作者单位 | 1.City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Hong Kong, Peoples R China; 2.Hong Kong Univ Sci & Technol, Div Environm, Hong Kong, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Lee, Berto Paul,Wang, Hao,Chan, Chak Keung. Diurnal and day-to-day characteristics of ambient particle mass size distributions from HR-ToF-AMS measurements at an urban site and a suburban site in Hong Kong[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(22). |
APA | Lee, Berto Paul,Wang, Hao,&Chan, Chak Keung.(2017).Diurnal and day-to-day characteristics of ambient particle mass size distributions from HR-ToF-AMS measurements at an urban site and a suburban site in Hong Kong.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(22). |
MLA | Lee, Berto Paul,et al."Diurnal and day-to-day characteristics of ambient particle mass size distributions from HR-ToF-AMS measurements at an urban site and a suburban site in Hong Kong".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.22(2017). |
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