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Variability of hydroxyl radical (OH) reactivity in the Landes maritime pine forest: results from the LANDEX campaign 2017

dc.rights.licenseopenen_US
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
dc.contributor.authorBSAIBES, Sandy
hal.structure.identifierPhysicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
dc.contributor.authorAL AJAMI, Mohamad
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMERMET, Kenneth
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierChimie Atmosphérique Expérimentale [CAE]
dc.contributor.authorTRUONG, François
hal.structure.identifierPhysicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
dc.contributor.authorBATUT, Sebastien
hal.structure.identifierPhysicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
dc.contributor.authorHECQUET, Christophe
hal.structure.identifierCentre for Energy and Environment [CERI EE - IMT Nord Europe]
hal.structure.identifierEcole nationale supérieure Mines-Télécom Lille Douai [IMT Lille Douai]
dc.contributor.authorDUSANTER, Sébastien
hal.structure.identifierCentre for Energy and Environment [CERI EE - IMT Nord Europe]
hal.structure.identifierEcole nationale supérieure Mines-Télécom Lille Douai [IMT Lille Douai]
dc.contributor.authorLÉORNADIS, Thierry
hal.structure.identifierCentre for Energy and Environment [CERI EE - IMT Nord Europe]
hal.structure.identifierEcole nationale supérieure Mines-Télécom Lille Douai [IMT Lille Douai]
dc.contributor.authorSAUVAGE, Stéphane
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorKAMMER, Julien
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFLAUD, Pierre Marie
ORCID: 0000-0002-2331-5641
IDREF: 102543291
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorPERRAUDIN, Emilie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorVILLENAVE, Eric
hal.structure.identifierCentre for Energy and Environment [CERI EE - IMT Nord Europe]
hal.structure.identifierEcole nationale supérieure Mines-Télécom Lille Douai [IMT Lille Douai]
dc.contributor.authorLOCOGE, Nadine
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierChimie Atmosphérique Expérimentale [CAE]
dc.contributor.authorGROS, Valérie
hal.structure.identifierPhysicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
dc.contributor.authorSCHOEMAECKER, Coralie
dc.date.accessioned2024-04-10T08:45:15Z
dc.date.available2024-04-10T08:45:15Z
dc.date.issued2020
dc.identifier.issn1680-7316en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197395
dc.description.abstractEnTotal hydroxyl radical (OH) reactivity measurements were conducted during the LANDEX intensive field campaign in a coniferous temperate forest located in the Lan-des area, southwestern France, during July 2017. In order to investigate inter-canopy and intra-canopy variability, measurements were performed inside (6 m) and above the canopy level (12 m), as well as at two different locations within the canopy, using a comparative reactivity method (CRM) and a laser photolysis-laser-induced fluorescence (LP-LIF) instrument. The two techniques were intercompared at the end of the campaign by performing measurements at the same location. Volatile organic compounds were also monitored at both levels with a proton transfer time-of-flight mass spectrometer and online gas chromatography instruments to evaluate their contribution to total OH reactivity, with monoterpenes being the main reactive species emitted in this forest dominated by Pinus pinaster Aiton. Total OH reactivity varied diurnally, following the trend of biogenic volatile organic compounds (BVOCs), the emissions and concentrations of which were dependent on meteorological parameters. Average OH reactivity was around 19.2 and 16.5 s −1 inside and above the canopy, respectively. The highest levels of total OH reactivity were observed during nights with a low turbulence (u * ≤ 0.2 m s −1), leading to lower mixing of emitted species within the canopy and thus an important vertical stratification characterized by a strong concentration gradient. Comparing the measured and the calculated OH reactivity highlighted an average missing OH reactivity of 22 % and 33 % inside and above the canopy, respectively. A day-night variability was observed on missing OH reactivity at both heights. Investigations showed that during daytime, missing OH sinks could be due to primary emissions and secondary products linked to a temperature-enhanced photochemistry. Regarding nighttime missing OH reactivity, higher levels were seen for the stable and warm night of 4-5 July, showing that these conditions could have been favorable for the accumulation of long-lived species (primary and secondary species) during the transport of the air mass from nearby forests.
dc.description.sponsorshipPhysiques et Chimie de l'Environnement Atmosphériqueen_US
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enVariability of hydroxyl radical (OH) reactivity in the Landes maritime pine forest: results from the LANDEX campaign 2017
dc.typeArticle de revueen_US
dc.identifier.doi10.5194/acp-20-1277-2020en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalAtmospheric Chemistry and Physicsen_US
bordeaux.page1277-1300en_US
bordeaux.volume20en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue3en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamLPTCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02913598
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccCC BYen_US
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