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Sci Total Environ

Title:		Atmospheric reactivity of biogenic volatile organic compounds in a maritime pine forest during the LANDEX episode 1 field campaign
Author(s):		Mermet K; Perraudin E; Dusanter S; Sauvage S; Leonardis T; Flaud PM; Bsaibes S; Kammer J; Michoud V; Gratien A; Cirtog M; Al Ajami M; Truong F; Batut S; Hecquet C; Doussin JF; Schoemaecker C; Gros V; Locoge N; Villenave E;
Address:		"Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600 Pessac, France; IMT Lille Douai, Univ. Lille - SAGE, Departement Sciences de l'Atmosphere et Genie de l'Environnement, 59000 Lille, France. Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600 Pessac, France. IMT Lille Douai, Univ. Lille - SAGE, Departement Sciences de l'Atmosphere et Genie de l'Environnement, 59000 Lille, France. Laboratoire des Sciences du Climat et de l'Environnement, LSCE, UMR CNRS-CEA-UVSQ, 91191 Gif-sur-Yvette, France. Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600 Pessac, France; Laboratoire des Sciences du Climat et de l'Environnement, LSCE, UMR CNRS-CEA-UVSQ, 91191 Gif-sur-Yvette, France. LISA, UMR CNRS 7583, Universite Paris-Est Creteil, Universite de Paris, Institut Pierre Simon Laplace (IPSL), Creteil, France. Laboratoire Physico Chimie des Processus de Combustion et de l'Atmosphere, PC2A, UMR 8522, 59655 Villeneuve d'Ascq, France. Univ. Bordeaux, CNRS, EPOC, EPHE, UMR 5805, F-33600 Pessac, France. Electronic address: eric.villenave@u-bordeaux.fr"
Journal Title:		Sci Total Environ
Year:		2021
Volume:		20201126
Issue:
Page Number:		144129 -
DOI:		10.1016/j.scitotenv.2020.144129
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Trace gas measurements were performed during the LANDEX (the LANDes EXperiment) Episode 1 field campaign in the summer 2017, in one of the largest European maritime pine forests (> 95% Pinus pinaster) located in southwestern France. Efforts have been focused on obtaining a good speciation of 20 major biogenic volatile organic compounds (BVOCs, including pinenes, carenes, terpinenes, linalool, camphene, etc.). This was made possible by the development of a new and specific chromatographic method. In order to assess the role of BVOCs in the local gas phase chemistry budget, their reactivity with the main atmospheric oxidants (hydroxyl radicals (OH), ozone (O(3)) and nitrate radicals (NO(3))) and the corresponding consumption rates were determined. When considering the OH reactivity with BVOCs, isoprene and linalool accounted for 10-47% of the OH depletion during daytime, and monoterpenes for 50-65%, whereas monoterpenes were the main contributors during the night (70-85%). Sesquiterpenes and monoterpenes were the main contributors to the ozone reactivity, especially beta-caryophyllene (30-70%), with a maximum contribution during nighttime. Nighttime nitrate reactivity was predominantly due to monoterpenes (i.e. 90-95%). Five specific groups have been proposed to classify the 19 BVOCs measured in the forest, according to their reactivity with atmospheric oxidants and their concentrations. The total amount of BVOCs consumed under and above the forest canopy was evaluated for 7 BVOCs (i.e. isoprene, alpha-pinene, beta-pinene, myrcene, limonene + cis-ocimene and Delta(3)-carene). The reactivity of atmospheric oxidants and BVOCs at a local level are discussed in order to highlight the compounds (BVOCs, other VOCs), the atmospheric oxidants and the main associated reactive processes observed under the canopy of a maritime pine forest"
Keywords:		Bvoc Field campaign Nitrate radicals OH radicals Ozone Reactivity;
Notes:		"PubMed-not-MEDLINEMermet, Kenneth Perraudin, Emilie Dusanter, Sebastien Sauvage, Stephane Leonardis, Thierry Flaud, Pierre-Marie Bsaibes, Sandy Kammer, Julien Michoud, Vincent Gratien, Aline Cirtog, Manuela Al Ajami, Mohamad Truong, Francois Batut, Sebastien Hecquet, Christophe Doussin, Jean-Francois Schoemaecker, Coralie Gros, Valerie Locoge, Nadine Villenave, Eric eng Netherlands 2020/12/15 Sci Total Environ. 2021 Feb 20; 756:144129. doi: 10.1016/j.scitotenv.2020.144129. Epub 2020 Nov 26"