DOI: 10.1016/j.atmosenv.2014.04.035
Scopus记录号: 2-s2.0-84901018903
论文题名: Volatile organic compound speciation above and within a Douglas fir forest
作者: Copeland N ; , Cape J ; N ; , Nemitza E ; , Heal M ; R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 94 起始页码: 86
结束页码: 95
语种: 英语
英文关键词: BVOC
; Isoprene
; Monoterpene
; Pinene
; PTR-MS
; VDEC
Scopus关键词: Acetone
; Forestry
; Isoprene
; Lipids
; Mixing
; Volatile organic compounds
; BVOC
; Monoterpene
; Pinene
; PTR-MS
; VDEC
; Monoterpenes
; acetaldehyde
; acetone
; isoprene
; pinene
; terpene
; terpene derivative
; volatile organic compound
; atmosphere-biosphere interaction
; biogenic emission
; canopy exchange
; coniferous forest
; eddy covariance
; emission inventory
; leaf litter
; mass spectrometry
; mixing ratio
; speciation (chemistry)
; terpene
; volatile organic compound
; ambient air
; article
; canopy
; Douglas fir
; foliage
; forest
; leaf litter
; Netherlands
; nonhuman
; planting density
; priority journal
; species differentiation
; Acetone
; Forestry
; Isoprene
; Lipids
; Mixing
; Monoterpenes
; Voc
; Netherlands
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Mixing ratios and fluxes of volatile organic compounds (VOCs) were measured by PTR-MS (and GC-MS) and virtual disjunct eddy covariance during a three-week field campaign in summer 2009 within and above a Douglas fir (Pseudotsuga menziesii) forest in Speulderbos, the Netherlands. Measurements included the first non-terpenoid species fluxes and mixing ratios for Douglas fir canopy. Above-canopy emissions of monoterpenes were comparable to previous studies of P.menziesii, with estimated standard emission factors for the first and second halves of the campaign of 0.8±0.4 and 0.8±0.3μggdw -1h-1, and temperature coefficients of 0.19±0.06 and 0.08±0.05°C-1, respectively. Estimated isoprene standard emission factors for the two halves of the campaign were 0.09±0.12 and 0.16±0.18μggdw -1h-1. Fluxes of several non-terpenoid VOCs were significant, with maximum fluxes greater than has been measured for other coniferous species. α-Pinene was the dominant monoterpene within and above the canopy. Within-canopy mixing ratios of individual species were generally greatest in early evening consistent with reduced vertical mixing and continued temperature-dependent emissions. Acetaldehyde, acetone and monoterpenes had elevated mixing ratios toward the bottom of the canopy (5-10m) with assumed contribution from the large quantities of forest-floor leaf litter. MBO (2-methyl-3-buten-2-ol) and estragole had peak mixing ratios at the top of the canopy and are known to have coniferous sources. MVK+MACR (methyl vinyl ketone and methacrolein) also had highest mixing ratios at the top of the canopy consistent with formation from in-canopy oxidation of isoprene. The work highlights the importance of quantifying a wider variety of VOCs from biogenic sources than isoprene and monoterpenes. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80815
Appears in Collections: 气候变化事实与影响
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作者单位: Centre for Ecology and Hydrology, Bush Estate, Penicuik EH26 0QB, United Kingdom; School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
Recommended Citation:
Copeland N,, Cape J,N,et al. Volatile organic compound speciation above and within a Douglas fir forest[J]. Atmospheric Environment,2014-01-01,94