Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-1143-2017 |
The surface aerosol optical properties in the urban area of Nanjing, west Yangtze River Delta, China | |
Zhuang, Bingliang1; Wang, Tijian1; Liu, Jane1,2; Li, Shu1; Xie, Min1; Han, Yong1; Chen, Pulong1; Hu, Qiduo1; Yang, Xiu-qun1; Fu, Congbin1; Zhu, Jialei3 | |
2017-01-25 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Canada; USA |
英文摘要 | Observational studies of aerosol optical properties are useful for reducing uncertainties in estimations of aerosol radiative forcing and forecasting visibility. In this study, the observed near-surface aerosol optical properties in urban Nanjing are analysed from March 2014 to February 2016. Results show that near-surface urban aerosols in Nanjing are mainly from local emissions and the surrounding regions. They have lower loadings but are more scattering than aerosols in most cities in China. The annual mean aerosol extinction coefficient (EC), single-scattering albedo (SSA) and asymmetry parameter (ASP) at 550 nm are 381.96 Mm(-1), 0.9 and 0.57, respectively. The aerosol absorption coefficient (AAC) is about 1 order of magnitude smaller than its scattering coefficient (SC). However, the absorbing aerosol has a larger Angstrom exponent (AAE) value, 1.58 at 470/660 nm, about 0.2 larger than the scattering aerosols (SAE). All the aerosol optical properties follow a near-unimodal pattern, and their values are mostly concentrated around their averages, accounting for more than 60% of the total samplings. Additionally, they have substantial seasonality and diurnal variations. High levels of SC and AAC all appear in winter due to higher aerosol and trace gas emissions. AAE (ASP) is the smallest (largest) in summer, possibly because of high relative humidity (RH) which also causes considerably larger SC and smaller SAE, although intensive gas-to-particle transformation could produce a large number of finer scattering aerosols in this season. Seasonality of EC is different from the columnar aerosol optical depth. Larger AACs appear during the rush hours of the day while SC and back-scattering coefficient (Bsp) only peak in the early morning. Aerosols are fresher in the daytime than at night-time, leading to their larger Angstrom exponent and smaller ASP. Different temporal variations between AAC and SC cause the aerosols to be more absorbing (smaller SSA) in autumn, winter and around rush hours. ASP has a good quasi-log-normal growth trend with increasing SC when RH is below 60 %. The correlation between AAC and SC at the site is close but a little smaller than that in suburban Nanjing in spring. Atmospheric visibility decreases exponentially with increasing EC or SC, more sharply in spring and summer, and it could be further deteriorated with increasing SSA and ASP. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394599300001 |
WOS关键词 | BLACK CARBON AEROSOLS ; ANTHROPOGENIC AEROSOLS ; ABSORPTION-COEFFICIENT ; VERTICAL-DISTRIBUTION ; AIRCRAFT MEASUREMENTS ; RADIATIVE PROPERTIES ; ATMOSPHERIC AEROSOL ; LIGHT-ABSORPTION ; LOESS PLATEAU ; RURAL SITE |
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/20617 |
专题 | 地球科学 |
作者单位 | 1.Nanjing Univ, Sch Atmospher Sci, Jiangsu Collaborat Innovat Ctr Climate Change, CMA NJU Joint Lab Climate Predict Studies, Nanjing 210023, Jiangsu, Peoples R China; 2.Univ Toronto, Dept Geog & Planning, Toronto, ON M5S 3G3, Canada; 3.Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Zhuang, Bingliang,Wang, Tijian,Liu, Jane,et al. The surface aerosol optical properties in the urban area of Nanjing, west Yangtze River Delta, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(2). |
APA | Zhuang, Bingliang.,Wang, Tijian.,Liu, Jane.,Li, Shu.,Xie, Min.,...&Zhu, Jialei.(2017).The surface aerosol optical properties in the urban area of Nanjing, west Yangtze River Delta, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(2). |
MLA | Zhuang, Bingliang,et al."The surface aerosol optical properties in the urban area of Nanjing, west Yangtze River Delta, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.2(2017). |
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