title: Seasonal, diurnal and nocturnal variations of carbonyl compounds in the semi-urban environment of Orléans, France.
abstract: 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 NOx 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.
authors.affiliation: Institut de Combustion, Aerothermique, Reactivité Environnement (ICARE), CNRS/OSUC 1C Avenue de la Recherche Scientifique, 45071 Orléans Cedex 02, France; College of Chemical and Biological Engineering, Changsha University of Science and Technology, Changsha 410004, China.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Jiang
authors.affiliation: Institut de Combustion, Aerothermique, Reactivité Environnement (ICARE), CNRS/OSUC 1C Avenue de la Recherche Scientifique, 45071 Orléans Cedex 02, France.
authors.forename: Benoît
authors.initials: B
authors.lastname: Grosselin
authors.affiliation: Institut de Combustion, Aerothermique, Reactivité Environnement (ICARE), CNRS/OSUC 1C Avenue de la Recherche Scientifique, 45071 Orléans Cedex 02, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Daële
authors.affiliation: Institut de Combustion, Aerothermique, Reactivité Environnement (ICARE), CNRS/OSUC 1C Avenue de la Recherche Scientifique, 45071 Orléans Cedex 02, France. Electronic address: mellouki@cnrs-orleans.fr.
authors.forename: Abdelwahid
authors.initials: A
authors.lastname: Mellouki
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: yjmu@rcees.ac.cn.
authors.forename: Yujing
authors.initials: Y
authors.lastname: Mu
mesh_terms: D000079:Acetaldehyde / Q000032:analysis; D000096:Acetone / Q000032:analysis; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D002947:Cities; D004784:Environmental Monitoring; D005557:Formaldehyde / Q000032:analysis; D005602:France; D009609:Nitrous Oxide / Q000032:analysis; D010126:Ozone / Q000032:analysis / Q000737:chemistry; D012621:Seasons; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry; D014919:Wind
chemical_list: D000393:Air Pollutants; D055549:Volatile Organic Compounds; D000096:Acetone; D005557:Formaldehyde; D010126:Ozone; D000079:Acetaldehyde; D009609:Nitrous Oxide
keywords: Carbonyls; Measurements; Semi-urban