Seasonal, diurnal and nocturnal variations of carbonyl compounds in the semi-urban environment of Orléans, France

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• 作者：Zhaohui Jiang¹ ; ² ; Benoî ; t Grosselin¹ ; Vé ; ronique Daë ; le¹ ; Abdelwahid Mellouki¹ ; ^{mellouki@cnrs-orleans.fr" class="auth_mail" title="E-mail the corresponding author} ; Yujing Mu³ ; ^{yjmu@rcees.ac.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Carbonyls ; Measurements ; Semi-urban
• 刊名：Journal of Environmental Sciences
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：40
• 期：Complete
• 页码：84-91
• 全文大小：2570 K

文摘

Atmospheric carbonyls were measured at a semi-urban site in Orléans, France, from October 2010 to July 2011. Formaldehyde, acetaldehyde and acetone were found to be the most abundant carbonyls, with average concentrations of 3.1, 1.0, 2.0 ppb, respectively in summer, 2.3, 0.7, 2.2 ppb, respectively in autumn, 2.2, 1.0, 2.1 ppb, respectively in spring, and 1.5, 0.7, 1.1 ppb, respectively in winter. Photo-oxidation of volatile organic compounds (VOCs) was found to make a remarkable contribution to atmospheric carbonyls in the semi-urban site based on the distinct seasonal and diurnal variations of the carbonyls, as well as the significantly positive correlations between the carbonyls and ozone. The significantly negative correlations between NO_x and O₃ as well as the carbonyls and the positive correlations between wind speed and O₃ as well as the carbonyls implied that the carbonyls and O₃ at the semi-urban site were probably formed during air mass transport from neighboring cities.