气候变化领域集成服务门户(CCPortal): Evolution of NO3 reactivity during the oxidation of isoprene

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DOI	10.5194/acp-20-10459-2020
	Evolution of NO3 reactivity during the oxidation of isoprene
	Dewald P.; M. Liebmann J.; Friedrich N.; Shenolikar J.; Schuladen J.; Rohrer F.; Reimer D.; Tillmann R.; Novelli A.; Cho C.; Xu K.; Holzinger R.; Bernard F.; Zhou L.; Mellouki W.; S. Brown S.; Fuchs H.; Lelieveld J.; N. Crowley J.
发表日期	2020
ISSN	1680-7316
起始页码	10459
结束页码	10475
卷号	20 期号:17
英文摘要	In a series of experiments in an atmospheric simulation chamber (SAPHIR,1 Forschungszentrum Julich, Germany), NO3 reactivity (kNO3 ) resulting from the reaction of NO3 with isoprene and stable trace gases formed as products was measured directly using a flow tube reactor coupled to a cavity ring-down spectrometer (FT-CRDS). The experiments were carried out in both dry and humid air with variation of the initial mixing ratios of ozone (50-100 ppbv), isoprene (3-22 ppbv) and NO2 (5-30 ppbv). kNO3 was in excellent agreement with values calculated from the isoprene mixing ratio and the rate coefficient for the reaction of NO3 with isoprene. This result serves to confirm that the FT-CRDS returns accurate values of kNO3 even at elevated NO2 concentrations and to show that reactions of NO3 with stable reaction products like non-radical organic nitrates do not contribute significantly to NO3 reactivity during the oxidation of isoprene. A comparison of kNO3 with NO3 reactivities calculated from NO3 mixing ratios and NO3 production rates suggests that organic peroxy radicals and HO2 account for 50% of NO3 losses. This contradicts predictions based on numerical simulations using the Master Chemical Mechanism (MCM version 3.3.1) unless the rate coefficient for reaction between NO3 and isoprene-derived RO2 is roughly doubled to 51012 cm3 molecule1 s1. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	atmospheric chemistry; concentration (composition); isoprene; mixing ratio; nitrate; oxidation; trace gas
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141113
作者单位	Atmospheric Chemistry Department, Max-Planck-Institut für Chemie, Mainz, 55128, Germany; Institute of Energy and Climate Research, IEK-8 Troposphere, Forschungszentrum Jülich GmbH, Jülich, 52428, Germany; Institute for Marine and Atmospheric Research, Imau, Utrecht University, Utrecht, Netherlands; Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Cnrs (UPR 3021)/OSUC, 1C Avenue de la Recherche Scientifique, Orléans CEDEX 2, 45071, France; Noaa Chemical Sciences Laboratory, 325 Broadway, Boulder, CO 80305, United States; Department of Chemistry, University of Colorado Boulder, Boulder, CO 80209, United States; Now At: Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Centre National de la Recherche Scientifique (CNRS), Université d'Orléans, Observatoire des Sciences de l'Univers en Région Centre - Val de Loire (OSUC), Orléans, France
推荐引用方式 GB/T 7714	Dewald P.,M. Liebmann J.,Friedrich N.,et al. Evolution of NO3 reactivity during the oxidation of isoprene[J],2020,20(17).
APA	Dewald P..,M. Liebmann J..,Friedrich N..,Shenolikar J..,Schuladen J..,...&N. Crowley J..(2020).Evolution of NO3 reactivity during the oxidation of isoprene.Atmospheric Chemistry and Physics,20(17).
MLA	Dewald P.,et al."Evolution of NO3 reactivity during the oxidation of isoprene".Atmospheric Chemistry and Physics 20.17(2020).