Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027266 |
Sources and Potential Photochemical Roles of Formaldehyde in an Urban Atmosphere in South China | |
Wang, Chuan; Huang, Xiao-Feng; Han, Yu; Zhu, Bo; He, Ling-Yan | |
2017-11-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Formaldehyde (HCHO) is an important intermediate in tropospheric photochemistry. However, study of its evolution characteristics under heavy pollution conditions in China is limited, especially for high temporal resolutions, making it difficult to analyze its sources and environmental impacts. In this study, ambient levels of HCHO were monitored using a proton-transfer reaction mass spectrometer at an urban site in the Pearl River Delta of China. Continuous monitoring campaigns were conducted in the spring, summer, fall, and winter in 2016. The highest averaged HCHO concentrations were observed in autumn (5.1 +/- 3.1 ppbv) and summer (5.0 +/- 4.4 ppbv), followed by winter (4.2 +/- 2.2 ppbv) and spring (3.4 +/- 1.6 ppbv). The daily maximum of HCHO occurs in the early afternoon and shows good correlations with O-3 and the secondary organic aerosol tracer during the day, revealing close relationships between ambient HCHO and secondary formations in Shenzhen, especially in summer and autumn. The daytime HCHO is estimated to be the major contributor to O-3 formation and OH radical production, indicating that HCHO plays a key role in the urban atmospheric photochemical reactions. Anthropogenic secondary formation was calculated to be the dominant source of HCHO using a photochemical age-based parameterization method, with an average proportion of 39%. The contributions of biogenic sources in summer (41%) and autumn (39%) are much higher than those in spring (26%) and winter (28%), while the contributions of anthropogenic primary sources in spring (20%) and winter (18%) are twice those in summer (9%) and autumn (9%). |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417195500031 |
WOS关键词 | PROTON-TRANSFER-REACTION ; PEARL RIVER DELTA ; VOLATILE ORGANIC-COMPOUNDS ; SPECTROMETRY PTR-MS ; CARBONYL-COMPOUNDS ; AMBIENT FORMALDEHYDE ; SOURCE APPORTIONMENT ; AIR-POLLUTION ; TECHNICAL NOTE ; MIXING RATIOS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/33549 |
专题 | 气候变化 |
作者单位 | Peking Univ, Sch Environm & Energy, Key Lab Urban Habitat Environm Sci & Technol, Shenzhen Grad Sch, Shenzhen, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Chuan,Huang, Xiao-Feng,Han, Yu,et al. Sources and Potential Photochemical Roles of Formaldehyde in an Urban Atmosphere in South China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(21). |
APA | Wang, Chuan,Huang, Xiao-Feng,Han, Yu,Zhu, Bo,&He, Ling-Yan.(2017).Sources and Potential Photochemical Roles of Formaldehyde in an Urban Atmosphere in South China.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(21). |
MLA | Wang, Chuan,et al."Sources and Potential Photochemical Roles of Formaldehyde in an Urban Atmosphere in South China".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.21(2017). |
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