Reassessing the photochemical production of methanol from peroxy radical self and cross reactions using the STOCHEM-CRI global chemistry and transport model

M H Khan; M.C. Cooke; S.R. Utembe; P. Xiao; R.G. Derwent; Michael E Jenkin; Alewx T Archibald; P. Maxwell; W.C. Morris; N. South; C.J. Percival; Dudley E Shallcross

doi:10.1016/j.atmosenv.2014.09.056

Reassessing the photochemical production of methanol from peroxy radical self and cross reactions using the STOCHEM-CRI global chemistry and transport model

M H Khan, M.C. Cooke, S.R. Utembe, P. Xiao, R.G. Derwent, Michael E Jenkin, Alewx T Archibald, P. Maxwell, W.C. Morris, N. South, C.J. Percival, Dudley E Shallcross

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

18 Citations (Scopus)

Abstract

Methanol (CH3OH) is an oxygenated volatile organic compound (VOC) and one of the most abundant species present in the troposphere. The mass of CH3OH in the atmospheric reservoir, its annual mass flux from sources to sinks, and its global budget have been investigated using STOCHEM-CRI, a global three-dimensional chemistry transport model. Our study shows that the global burden of methanol is 5 Tg. The atmospheric life-time of CH3OH is found to be 6.1 days which falls within the range of previous modelling studies. The impact of peroxy radicals on the photochemical production of CH3OH has been studied and suggests that NMVOCs (non-methane Volatile Organic Compounds) are an important source of both peroxy radicals and CH3OH. The photochemical production routes of CH3OH are found to be 48 Tg/yr, which are higher than the previous studies and contributes significantly to the total global methanol sources of 287 Tg/yr. An additional CH3OH production of 8.2 Tg/yr from the reaction of methyl peroxy radicals (CH3O2) with hydroxyl radicals (OH) could be a significant additional source of CH3OH particularly over the tropical oceans which would lead to a revision of the global sources and life cycle of CH3OH.

Original language	English
Pages (from-to)	77-84
Number of pages	8
Journal	Atmospheric Environment
Volume	99
DOIs	https://doi.org/10.1016/j.atmosenv.2014.09.056
Publication status	Published - Dec 2014

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Gas phase studies of the kinetics of Criegee Intermediates
Shallcross, D. E. (Principal Investigator) & Orr-Ewing, A. J. (Co-Principal Investigator)
30/06/13 → 31/12/16
Project: Research
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

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Khan, M. H., Cooke, M. C., Utembe, S. R., Xiao, P., Derwent, R. G., Jenkin, M. E., Archibald, A. T., Maxwell, P., Morris, W. C., South, N., Percival, C. J., & Shallcross, D. E. (2014). Reassessing the photochemical production of methanol from peroxy radical self and cross reactions using the STOCHEM-CRI global chemistry and transport model. Atmospheric Environment, 99, 77-84. https://doi.org/10.1016/j.atmosenv.2014.09.056

@article{59bc8868bec843d4941989b048c4abd1,

title = "Reassessing the photochemical production of methanol from peroxy radical self and cross reactions using the STOCHEM-CRI global chemistry and transport model",

abstract = "Methanol (CH3OH) is an oxygenated volatile organic compound (VOC) and one of the most abundant species present in the troposphere. The mass of CH3OH in the atmospheric reservoir, its annual mass flux from sources to sinks, and its global budget have been investigated using STOCHEM-CRI, a global three-dimensional chemistry transport model. Our study shows that the global burden of methanol is 5 Tg. The atmospheric life-time of CH3OH is found to be 6.1 days which falls within the range of previous modelling studies. The impact of peroxy radicals on the photochemical production of CH3OH has been studied and suggests that NMVOCs (non-methane Volatile Organic Compounds) are an important source of both peroxy radicals and CH3OH. The photochemical production routes of CH3OH are found to be 48 Tg/yr, which are higher than the previous studies and contributes significantly to the total global methanol sources of 287 Tg/yr. An additional CH3OH production of 8.2 Tg/yr from the reaction of methyl peroxy radicals (CH3O2) with hydroxyl radicals (OH) could be a significant additional source of CH3OH particularly over the tropical oceans which would lead to a revision of the global sources and life cycle of CH3OH.",

author = "Khan, {M H} and M.C. Cooke and S.R. Utembe and P. Xiao and R.G. Derwent and Jenkin, {Michael E} and Archibald, {Alewx T} and P. Maxwell and W.C. Morris and N. South and C.J. Percival and Shallcross, {Dudley E}",

year = "2014",

month = dec,

doi = "10.1016/j.atmosenv.2014.09.056",

language = "English",

volume = "99",

pages = "77--84",

journal = "Atmospheric Environment",

issn = "1352-2310",

publisher = "Elsevier",

}

Khan, MH, Cooke, MC, Utembe, SR, Xiao, P, Derwent, RG, Jenkin, ME, Archibald, AT, Maxwell, P, Morris, WC, South, N, Percival, CJ & Shallcross, DE 2014, 'Reassessing the photochemical production of methanol from peroxy radical self and cross reactions using the STOCHEM-CRI global chemistry and transport model', Atmospheric Environment, vol. 99, pp. 77-84. https://doi.org/10.1016/j.atmosenv.2014.09.056

TY - JOUR

T1 - Reassessing the photochemical production of methanol from peroxy radical self and cross reactions using the STOCHEM-CRI global chemistry and transport model

AU - Khan, M H

AU - Cooke, M.C.

AU - Utembe, S.R.

AU - Xiao, P.

AU - Derwent, R.G.

AU - Jenkin, Michael E

AU - Archibald, Alewx T

AU - Maxwell, P.

AU - Morris, W.C.

AU - South, N.

AU - Percival, C.J.

AU - Shallcross, Dudley E

PY - 2014/12

Y1 - 2014/12

N2 - Methanol (CH3OH) is an oxygenated volatile organic compound (VOC) and one of the most abundant species present in the troposphere. The mass of CH3OH in the atmospheric reservoir, its annual mass flux from sources to sinks, and its global budget have been investigated using STOCHEM-CRI, a global three-dimensional chemistry transport model. Our study shows that the global burden of methanol is 5 Tg. The atmospheric life-time of CH3OH is found to be 6.1 days which falls within the range of previous modelling studies. The impact of peroxy radicals on the photochemical production of CH3OH has been studied and suggests that NMVOCs (non-methane Volatile Organic Compounds) are an important source of both peroxy radicals and CH3OH. The photochemical production routes of CH3OH are found to be 48 Tg/yr, which are higher than the previous studies and contributes significantly to the total global methanol sources of 287 Tg/yr. An additional CH3OH production of 8.2 Tg/yr from the reaction of methyl peroxy radicals (CH3O2) with hydroxyl radicals (OH) could be a significant additional source of CH3OH particularly over the tropical oceans which would lead to a revision of the global sources and life cycle of CH3OH.

AB - Methanol (CH3OH) is an oxygenated volatile organic compound (VOC) and one of the most abundant species present in the troposphere. The mass of CH3OH in the atmospheric reservoir, its annual mass flux from sources to sinks, and its global budget have been investigated using STOCHEM-CRI, a global three-dimensional chemistry transport model. Our study shows that the global burden of methanol is 5 Tg. The atmospheric life-time of CH3OH is found to be 6.1 days which falls within the range of previous modelling studies. The impact of peroxy radicals on the photochemical production of CH3OH has been studied and suggests that NMVOCs (non-methane Volatile Organic Compounds) are an important source of both peroxy radicals and CH3OH. The photochemical production routes of CH3OH are found to be 48 Tg/yr, which are higher than the previous studies and contributes significantly to the total global methanol sources of 287 Tg/yr. An additional CH3OH production of 8.2 Tg/yr from the reaction of methyl peroxy radicals (CH3O2) with hydroxyl radicals (OH) could be a significant additional source of CH3OH particularly over the tropical oceans which would lead to a revision of the global sources and life cycle of CH3OH.

U2 - 10.1016/j.atmosenv.2014.09.056

DO - 10.1016/j.atmosenv.2014.09.056

M3 - Article (Academic Journal)

SN - 1352-2310

VL - 99

SP - 77

EP - 84

JO - Atmospheric Environment

JF - Atmospheric Environment

ER -

Reassessing the photochemical production of methanol from peroxy radical self and cross reactions using the STOCHEM-CRI global chemistry and transport model

Abstract

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Projects

Gas phase studies of the kinetics of Criegee Intermediates

Isoprene oxidation and OH recycling

Laboratory studies of Criegee radical reactions

Cite this