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Fluxes and concentrations of volatile organic compounds above central London, UK

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Fluxes and concentrations of volatile organic compounds above central London, UK. / Langford, Ben; Nemitz, E.; House, E. et al.
In: Atmospheric Chemistry and Physics , Vol. 10, No. 2, 2010, p. 627-645.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Langford, B, Nemitz, E, House, E, Phillips, GJ, Famulari, D, Davison, B, Hopkins, JR, Lewis, AC & Hewitt, CN 2010, 'Fluxes and concentrations of volatile organic compounds above central London, UK', Atmospheric Chemistry and Physics , vol. 10, no. 2, pp. 627-645.

APA

Langford, B., Nemitz, E., House, E., Phillips, G. J., Famulari, D., Davison, B., Hopkins, J. R., Lewis, A. C., & Hewitt, C. N. (2010). Fluxes and concentrations of volatile organic compounds above central London, UK. Atmospheric Chemistry and Physics , 10(2), 627-645.

Vancouver

Langford B, Nemitz E, House E, Phillips GJ, Famulari D, Davison B et al. Fluxes and concentrations of volatile organic compounds above central London, UK. Atmospheric Chemistry and Physics . 2010;10(2):627-645.

Author

Langford, Ben ; Nemitz, E. ; House, E. et al. / Fluxes and concentrations of volatile organic compounds above central London, UK. In: Atmospheric Chemistry and Physics . 2010 ; Vol. 10, No. 2. pp. 627-645.

Bibtex

@article{3f539fac418442e9884ec99a4d7649e3,
title = "Fluxes and concentrations of volatile organic compounds above central London, UK",
abstract = "Concentrations and fluxes of eight volatile organic compounds (VOCs) were measured during October 2006 from a high telecom tower above central London, as part of the CityFlux contribution to the REPARTEE I campaign. A continuous flow disjunct eddy covariance technique with analysis by proton transfer reaction mass spectrometry was used. Daily averaged VOC mixing ratios were within the range 1-19 ppb for the oxygenated compounds (methanol, acetaldehyde and acetone) and 0.2-1.3 ppb for the aromatics (benzene, toluene and C-2-benzenes). Typical VOC fluxes were in the range 0.1-1.0 mg m(-2) h(-1). There was a non-linear relationship between VOC fluxes and traffic density for most of the measured compounds. Traffic activity was estimated to account for approximately 70% of the aromatic compound fluxes, whereas non-traffic related sources were found to be more important for methanol and isoprene fluxes. The measured fluxes were comparable to the estimates of the UK national atmospheric emission inventory for the aromatic VOCs and CO. In contrast, fluxes of the oxygenated compounds were about three times larger than inventory estimates. For isoprene and acetonitrile this difference was many times larger. At temperatures over 25 degrees C it is estimated that more than half the isoprene observed in central London is of biogenic origin.",
keywords = "EDDY COVARIANCE MEASUREMENTS, REACTION MASS-SPECTROMETRY, MIXING RATIOS, PTR-MS, EMISSIONS, ATMOSPHERE, EXCHANGE, CITY, PARAMETERIZATION, HYDROCARBONS",
author = "Ben Langford and E. Nemitz and E. House and Phillips, {G. J.} and D. Famulari and Brian Davison and Hopkins, {J. R.} and Lewis, {A. C.} and Hewitt, {C. N.}",
year = "2010",
language = "English",
volume = "10",
pages = "627--645",
journal = "Atmospheric Chemistry and Physics ",
issn = "1680-7316",
publisher = "Copernicus GmbH (Copernicus Publications) on behalf of the European Geosciences Union (EGU)",
number = "2",

}

RIS

TY - JOUR

T1 - Fluxes and concentrations of volatile organic compounds above central London, UK

AU - Langford, Ben

AU - Nemitz, E.

AU - House, E.

AU - Phillips, G. J.

AU - Famulari, D.

AU - Davison, Brian

AU - Hopkins, J. R.

AU - Lewis, A. C.

AU - Hewitt, C. N.

PY - 2010

Y1 - 2010

N2 - Concentrations and fluxes of eight volatile organic compounds (VOCs) were measured during October 2006 from a high telecom tower above central London, as part of the CityFlux contribution to the REPARTEE I campaign. A continuous flow disjunct eddy covariance technique with analysis by proton transfer reaction mass spectrometry was used. Daily averaged VOC mixing ratios were within the range 1-19 ppb for the oxygenated compounds (methanol, acetaldehyde and acetone) and 0.2-1.3 ppb for the aromatics (benzene, toluene and C-2-benzenes). Typical VOC fluxes were in the range 0.1-1.0 mg m(-2) h(-1). There was a non-linear relationship between VOC fluxes and traffic density for most of the measured compounds. Traffic activity was estimated to account for approximately 70% of the aromatic compound fluxes, whereas non-traffic related sources were found to be more important for methanol and isoprene fluxes. The measured fluxes were comparable to the estimates of the UK national atmospheric emission inventory for the aromatic VOCs and CO. In contrast, fluxes of the oxygenated compounds were about three times larger than inventory estimates. For isoprene and acetonitrile this difference was many times larger. At temperatures over 25 degrees C it is estimated that more than half the isoprene observed in central London is of biogenic origin.

AB - Concentrations and fluxes of eight volatile organic compounds (VOCs) were measured during October 2006 from a high telecom tower above central London, as part of the CityFlux contribution to the REPARTEE I campaign. A continuous flow disjunct eddy covariance technique with analysis by proton transfer reaction mass spectrometry was used. Daily averaged VOC mixing ratios were within the range 1-19 ppb for the oxygenated compounds (methanol, acetaldehyde and acetone) and 0.2-1.3 ppb for the aromatics (benzene, toluene and C-2-benzenes). Typical VOC fluxes were in the range 0.1-1.0 mg m(-2) h(-1). There was a non-linear relationship between VOC fluxes and traffic density for most of the measured compounds. Traffic activity was estimated to account for approximately 70% of the aromatic compound fluxes, whereas non-traffic related sources were found to be more important for methanol and isoprene fluxes. The measured fluxes were comparable to the estimates of the UK national atmospheric emission inventory for the aromatic VOCs and CO. In contrast, fluxes of the oxygenated compounds were about three times larger than inventory estimates. For isoprene and acetonitrile this difference was many times larger. At temperatures over 25 degrees C it is estimated that more than half the isoprene observed in central London is of biogenic origin.

KW - EDDY COVARIANCE MEASUREMENTS

KW - REACTION MASS-SPECTROMETRY

KW - MIXING RATIOS

KW - PTR-MS

KW - EMISSIONS

KW - ATMOSPHERE

KW - EXCHANGE

KW - CITY

KW - PARAMETERIZATION

KW - HYDROCARBONS

M3 - Journal article

VL - 10

SP - 627

EP - 645

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 2

ER -