Seasonal cycles in short-lived hydrocarbons in baseline air masses arriving at Mace Head, Ireland

Richard G. Derwent; Peter G. Simmonds; Simon O'Doherty; Aoife Grant; Dickon Young; Michael C. Cooke; Alistair J. Manning; Steven R. Utembe; Michael E. Jenkin; Dudley E. Shallcross

doi:10.1016/j.atmosenv.2012.08.023

Seasonal cycles in short-lived hydrocarbons in baseline air masses arriving at Mace Head, Ireland

Richard G. Derwent^*, Peter G. Simmonds, Simon O'Doherty, Aoife Grant, Dickon Young, Michael C. Cooke, Alistair J. Manning, Steven R. Utembe, Michael E. Jenkin, Dudley E. Shallcross

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

14 Citations (Scopus)

Abstract

The observed seasonal cycles of a selection of reactive hydrocarbons in baseline air masses at Mace Head, Ireland are consistent with a simple picture of largely man-made sources and oxidation by hydroxyl (OH) radicals. M a result, the observed seasonal cycles become more pronounced the more reactive the species are with OH. For the pentanes, the assumption of little wintertime removal breaks down, leading to an apparent dampening of the seasonal cycles relative to ethane, propane and the butanes. A global chemistry-transport model is used to describe the seasonal cycles of the hydrocarbons at Mace Head and provided an accurate description of their observed amplitudes and phases. The model derived local OH concentrations in baseline air masses required to support the observed seasonal cycles of the hydrocarbons averaged 1.38 +/- 1.1 x 10(6) molecule cm(-3). Peak daytime levels during summertime reached 12 x 10(7) molecule cm(-3). (C) 2012 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	89-96
Number of pages	8
Journal	Atmospheric Environment
Volume	62
DOIs	https://doi.org/10.1016/j.atmosenv.2012.08.023
Publication status	Published - Dec 2012

Keywords

C-2-C-5 hydrocarbons
Seasonal cycles
OH
IN-SITU MEASUREMENTS
NONMETHANE HYDROCARBONS
GLOBAL DISTRIBUTION
BOUNDARY-LAYER
HO2 RADICALS
TROPOSPHERE
EMISSION
ATLANTIC
HALOCARBONS

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Isoprene oxidation and OH recycling
Shallcross, D. E. (Principal Investigator)
1/10/12 → 1/10/15
Project: Research
Laboratory studies of Criegee radical reactions
Shallcross, D. E. (Principal Investigator)
14/03/11 → 14/03/14
Project: Research
The gas phase atmospheric photolysis and reactions of key alkyl nitrates and their role in NOy partitioning.
Shallcross, D. E. (Principal Investigator) & Orr-Ewing, A. J. (Co-Principal Investigator)
1/10/09 → 1/04/13
Project: Research

Cite this

@article{bfa0ab3abd844e91a9582afa765c8c83,

title = "Seasonal cycles in short-lived hydrocarbons in baseline air masses arriving at Mace Head, Ireland",

abstract = "The observed seasonal cycles of a selection of reactive hydrocarbons in baseline air masses at Mace Head, Ireland are consistent with a simple picture of largely man-made sources and oxidation by hydroxyl (OH) radicals. M a result, the observed seasonal cycles become more pronounced the more reactive the species are with OH. For the pentanes, the assumption of little wintertime removal breaks down, leading to an apparent dampening of the seasonal cycles relative to ethane, propane and the butanes. A global chemistry-transport model is used to describe the seasonal cycles of the hydrocarbons at Mace Head and provided an accurate description of their observed amplitudes and phases. The model derived local OH concentrations in baseline air masses required to support the observed seasonal cycles of the hydrocarbons averaged 1.38 +/- 1.1 x 10(6) molecule cm(-3). Peak daytime levels during summertime reached 12 x 10(7) molecule cm(-3). (C) 2012 Elsevier Ltd. All rights reserved.",

keywords = "C-2-C-5 hydrocarbons, Seasonal cycles, OH, IN-SITU MEASUREMENTS, NONMETHANE HYDROCARBONS, GLOBAL DISTRIBUTION, BOUNDARY-LAYER, HO2 RADICALS, TROPOSPHERE, EMISSION, ATLANTIC, HALOCARBONS",

author = "Derwent, {Richard G.} and Simmonds, {Peter G.} and Simon O'Doherty and Aoife Grant and Dickon Young and Cooke, {Michael C.} and Manning, {Alistair J.} and Utembe, {Steven R.} and Jenkin, {Michael E.} and Shallcross, {Dudley E.}",

year = "2012",

month = dec,

doi = "10.1016/j.atmosenv.2012.08.023",

language = "English",

volume = "62",

pages = "89--96",

journal = "Atmospheric Environment",

issn = "1352-2310",

publisher = "Elsevier",

}

TY - JOUR

T1 - Seasonal cycles in short-lived hydrocarbons in baseline air masses arriving at Mace Head, Ireland

AU - Derwent, Richard G.

AU - Simmonds, Peter G.

AU - O'Doherty, Simon

AU - Grant, Aoife

AU - Young, Dickon

AU - Cooke, Michael C.

AU - Manning, Alistair J.

AU - Utembe, Steven R.

AU - Jenkin, Michael E.

AU - Shallcross, Dudley E.

PY - 2012/12

Y1 - 2012/12

N2 - The observed seasonal cycles of a selection of reactive hydrocarbons in baseline air masses at Mace Head, Ireland are consistent with a simple picture of largely man-made sources and oxidation by hydroxyl (OH) radicals. M a result, the observed seasonal cycles become more pronounced the more reactive the species are with OH. For the pentanes, the assumption of little wintertime removal breaks down, leading to an apparent dampening of the seasonal cycles relative to ethane, propane and the butanes. A global chemistry-transport model is used to describe the seasonal cycles of the hydrocarbons at Mace Head and provided an accurate description of their observed amplitudes and phases. The model derived local OH concentrations in baseline air masses required to support the observed seasonal cycles of the hydrocarbons averaged 1.38 +/- 1.1 x 10(6) molecule cm(-3). Peak daytime levels during summertime reached 12 x 10(7) molecule cm(-3). (C) 2012 Elsevier Ltd. All rights reserved.

AB - The observed seasonal cycles of a selection of reactive hydrocarbons in baseline air masses at Mace Head, Ireland are consistent with a simple picture of largely man-made sources and oxidation by hydroxyl (OH) radicals. M a result, the observed seasonal cycles become more pronounced the more reactive the species are with OH. For the pentanes, the assumption of little wintertime removal breaks down, leading to an apparent dampening of the seasonal cycles relative to ethane, propane and the butanes. A global chemistry-transport model is used to describe the seasonal cycles of the hydrocarbons at Mace Head and provided an accurate description of their observed amplitudes and phases. The model derived local OH concentrations in baseline air masses required to support the observed seasonal cycles of the hydrocarbons averaged 1.38 +/- 1.1 x 10(6) molecule cm(-3). Peak daytime levels during summertime reached 12 x 10(7) molecule cm(-3). (C) 2012 Elsevier Ltd. All rights reserved.

KW - C-2-C-5 hydrocarbons

KW - Seasonal cycles

KW - OH

KW - IN-SITU MEASUREMENTS

KW - NONMETHANE HYDROCARBONS

KW - GLOBAL DISTRIBUTION

KW - BOUNDARY-LAYER

KW - HO2 RADICALS

KW - TROPOSPHERE

KW - EMISSION

KW - ATLANTIC

KW - HALOCARBONS

U2 - 10.1016/j.atmosenv.2012.08.023

DO - 10.1016/j.atmosenv.2012.08.023

M3 - Article (Academic Journal)

SN - 1352-2310

VL - 62

SP - 89

EP - 96

JO - Atmospheric Environment

JF - Atmospheric Environment

ER -

Seasonal cycles in short-lived hydrocarbons in baseline air masses arriving at Mace Head, Ireland

Abstract

Keywords

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Projects

Isoprene oxidation and OH recycling

Laboratory studies of Criegee radical reactions

The gas phase atmospheric photolysis and reactions of key alkyl nitrates and their role in NOy partitioning.

Cite this