DOI: 10.1016/j.atmosres.2020.104869
论文题名: Biogenic volatile organic compounds (BVOCs) reactivity related to new particle formation (NPF) over the Landes forest
作者: Kammer J. ; Flaud P.-M. ; Chazeaubeny A. ; Ciuraru R. ; Le Menach K. ; Geneste E. ; Budzinski H. ; Bonnefond J.M. ; Lamaud E. ; Perraudin E. ; Villenave E.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2020
卷: 237 语种: 英语
英文关键词: BVOCs
; Landes forest
; Monoterpenes
; Nighttime NPF
; Oxidation products
Scopus关键词: Air quality
; Climate change
; Forestry
; Mixing
; Ozone
; Volatile organic compounds
; Atmospheric particles
; Biogenic volatile organic compounds
; BVOCs
; Cloud condensation nuclei
; New particle formation
; Nighttime NPF
; Oxidation products
; Secondary particles
; Monoterpenes
; air quality
; atmospheric pollution
; climate change
; cloud condensation nucleus
; concentration (composition)
; numerical model
; oxidation
; uncertainty analysis
; volatile organic compound
; France
英文摘要: Atmospheric particles play a major role in both air quality and climate change. Formation of secondary particles in the atmosphere has been observed over many different environments and is believed to provide up to half of the atmospheric cloud condensation nuclei (CCN) at a global scale. However, high uncertainties are still remaining in the description of mechanisms involved in new particle formation (NPF). Especially, more evidences of the implication of biogenic volatile organic compounds (BVOCs) in NPF from field studies are still needed. To investigate this question, two field campaigns have been set up during July 2014 and July 2015, in the French Landes forest (south west of France). Summer 2015 was characterized by a strong hydric stress, whereas summer 2014 was rainy. In 2015, frequent nocturnal NPF was observed, reaching a frequency of occurrence of ~55% of the nights, while only one event was observed in 2014. In July 2015, monoterpene mixing ratios (dominated by α- and β-pinene) were higher, mostly due to high ambient temperatures and drought. A focus was made on the 2015 field campaign, where NPF was mostly observed. The mean diurnal variation of the ratio between α- and β-pinene mixing ratios highlighted in-canopy reactivity of monoterpenes with ozone in the early night. This hypothesis was reinforced by the increasing gas phase levels of pinonaldehyde and nopinone, the main first-generation products arising from α- and β-pinene ozonolysis, at night, before NPF started. It strongly suggests that monoterpene oxidation further generated very-low volatility gases involved in NPF. This finding is also supported by the high concentrations of the SOA traditional biogenic tracers, e.g. pinic and pinonic acids, quantified in the particulate phase. The role of BVOCs in NPF is thus highlighted, as well as the importance of nighttime NPF. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158151
Appears in Collections: 气候变化与战略
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作者单位: University of Bordeaux, EPOC, UMR 5805 CNRS, Talence Cedex, 33405, France; CNRS, EPOC, UMR 5805 CNRS, Talence Cedex, 33405, France; INRA, UMR 1391 ISPA, Villenave d'Ornon, F-33140, France; Bordeaux Sciences Agro, UMR 1391 ISPA, Gradignan, F-33170, France
Recommended Citation:
Kammer J.,Flaud P.-M.,Chazeaubeny A.,et al. Biogenic volatile organic compounds (BVOCs) reactivity related to new particle formation (NPF) over the Landes forest[J]. Atmospheric Research,2020-01-01,237