Ozone photochemistry and elevated isoprene during the UK heatwave of August 2003

James D. Lee; Alastair C. Lewis; Paul S. Monks; Mark Jacob; Jacqueline F. Hamilton; James R. Hopkins; Nicola M. Watson; Julie E. Saxton; Christopher Ennis; Lucy J. Carpenter; Nicola Carslaw; Zoe Fleming; Brian J. Bandy; David E. Oram; Stuart A. Penkett; Jana Slemr; Emily Norton; Andrew R. Rickard; Lisa K Whalley; Dwayne E. Heard; William J. Bloss; Thomas Gravestock; Shona C. Smith; Jenny Stanton; Michael J. Pilling; Michael E. Jenkin

doi:10.1016/j.atmosenv.2006.06.057

Ozone photochemistry and elevated isoprene during the UK heatwave of August 2003

James D. Lee, Alastair C. Lewis, Paul S. Monks, Mark Jacob, Jacqueline F. Hamilton, James R. Hopkins, Nicola M. Watson, Julie E. Saxton, Christopher Ennis, Lucy J. Carpenter, Nicola Carslaw, Zoe Fleming, Brian J. Bandy, David E. Oram, Stuart A. Penkett, Jana Slemr, Emily Norton, Andrew R. Rickard, Lisa K Whalley, Dwayne E. HeardWilliam J. Bloss, Thomas Gravestock, Shona C. Smith, Jenny Stanton, Michael J. Pilling, Michael E. Jenkin

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Abstract

A wide range of chemical and physical parameters has been observed over the course of a severe Europe-wide air pollution episode in August 2003. Detailed surface observations made at the rural perimeter edge of London, UK, indicated significantly elevated levels of primary volatile organic compounds (VOCs), ozone (>110 ppbV), other photochemical by-products such as PAN, HCHO, and oxygenates but not NO_x. Reactive tracers in combination with Doppler wind radar and back trajectories have been used to establish that initial morning rises in O₃ during the episode were caused by entrainment of air from aloft, polluted on regional scales from mainland Europe. Total VOC reactivity to OH approximately doubled during this episode, with similar distribution between functional groups, but showing a temperature dependent contribution from biogenic isoprene (maximum 1.2 ppbv). Under episodic conditions total peroxy radicals in excess of 60 pptv were observed in late afternoon with strong correlation to a later and higher peak in ozone. Episodic alkyl peroxy radicals were calculated to be substantially influenced by peroxy acetyl, via the thermal dissociation of PAN at high temperatures.

Original language	English
Pages (from-to)	7598-7613
Number of pages	16
Journal	Atmospheric Environment
Volume	40
Issue number	39
DOIs	https://doi.org/10.1016/j.atmosenv.2006.06.057
Publication status	Published - 1 Dec 2006

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Lee, J. D., Lewis, A. C., Monks, P. S., Jacob, M., Hamilton, J. F., Hopkins, J. R., Watson, N. M., Saxton, J. E., Ennis, C., Carpenter, L. J., Carslaw, N., Fleming, Z., Bandy, B. J., Oram, D. E., Penkett, S. A., Slemr, J., Norton, E., Rickard, A. R., K Whalley, L., ... Jenkin, M. E. (2006). Ozone photochemistry and elevated isoprene during the UK heatwave of August 2003. Atmospheric Environment, 40(39), 7598-7613. https://doi.org/10.1016/j.atmosenv.2006.06.057

@article{c4f81193e2494033b7560b59631e67f4,

title = "Ozone photochemistry and elevated isoprene during the UK heatwave of August 2003",

abstract = "A wide range of chemical and physical parameters has been observed over the course of a severe Europe-wide air pollution episode in August 2003. Detailed surface observations made at the rural perimeter edge of London, UK, indicated significantly elevated levels of primary volatile organic compounds (VOCs), ozone (>110 ppbV), other photochemical by-products such as PAN, HCHO, and oxygenates but not NOx. Reactive tracers in combination with Doppler wind radar and back trajectories have been used to establish that initial morning rises in O3 during the episode were caused by entrainment of air from aloft, polluted on regional scales from mainland Europe. Total VOC reactivity to OH approximately doubled during this episode, with similar distribution between functional groups, but showing a temperature dependent contribution from biogenic isoprene (maximum 1.2 ppbv). Under episodic conditions total peroxy radicals in excess of 60 pptv were observed in late afternoon with strong correlation to a later and higher peak in ozone. Episodic alkyl peroxy radicals were calculated to be substantially influenced by peroxy acetyl, via the thermal dissociation of PAN at high temperatures.",

author = "Lee, {James D.} and Lewis, {Alastair C.} and Monks, {Paul S.} and Mark Jacob and Hamilton, {Jacqueline F.} and Hopkins, {James R.} and Watson, {Nicola M.} and Saxton, {Julie E.} and Christopher Ennis and Carpenter, {Lucy J.} and Nicola Carslaw and Zoe Fleming and Bandy, {Brian J.} and Oram, {David E.} and Penkett, {Stuart A.} and Jana Slemr and Emily Norton and Rickard, {Andrew R.} and {K Whalley}, Lisa and Heard, {Dwayne E.} and Bloss, {William J.} and Thomas Gravestock and Smith, {Shona C.} and Jenny Stanton and Pilling, {Michael J.} and Jenkin, {Michael E.}",

year = "2006",

month = dec,

day = "1",

doi = "10.1016/j.atmosenv.2006.06.057",

language = "English",

volume = "40",

pages = "7598--7613",

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issn = "1352-2310",

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Lee, JD, Lewis, AC, Monks, PS, Jacob, M, Hamilton, JF, Hopkins, JR, Watson, NM, Saxton, JE, Ennis, C, Carpenter, LJ, Carslaw, N, Fleming, Z, Bandy, BJ, Oram, DE, Penkett, SA, Slemr, J, Norton, E, Rickard, AR, K Whalley, L, Heard, DE, Bloss, WJ, Gravestock, T, Smith, SC, Stanton, J, Pilling, MJ & Jenkin, ME 2006, 'Ozone photochemistry and elevated isoprene during the UK heatwave of August 2003', Atmospheric Environment, vol. 40, no. 39, pp. 7598-7613. https://doi.org/10.1016/j.atmosenv.2006.06.057

TY - JOUR

T1 - Ozone photochemistry and elevated isoprene during the UK heatwave of August 2003

AU - Lee, James D.

AU - Lewis, Alastair C.

AU - Monks, Paul S.

AU - Jacob, Mark

AU - Hamilton, Jacqueline F.

AU - Hopkins, James R.

AU - Watson, Nicola M.

AU - Saxton, Julie E.

AU - Ennis, Christopher

AU - Carpenter, Lucy J.

AU - Carslaw, Nicola

AU - Fleming, Zoe

AU - Bandy, Brian J.

AU - Oram, David E.

AU - Penkett, Stuart A.

AU - Slemr, Jana

AU - Norton, Emily

AU - Rickard, Andrew R.

AU - K Whalley, Lisa

AU - Heard, Dwayne E.

AU - Bloss, William J.

AU - Gravestock, Thomas

AU - Smith, Shona C.

AU - Stanton, Jenny

AU - Pilling, Michael J.

AU - Jenkin, Michael E.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - A wide range of chemical and physical parameters has been observed over the course of a severe Europe-wide air pollution episode in August 2003. Detailed surface observations made at the rural perimeter edge of London, UK, indicated significantly elevated levels of primary volatile organic compounds (VOCs), ozone (>110 ppbV), other photochemical by-products such as PAN, HCHO, and oxygenates but not NOx. Reactive tracers in combination with Doppler wind radar and back trajectories have been used to establish that initial morning rises in O3 during the episode were caused by entrainment of air from aloft, polluted on regional scales from mainland Europe. Total VOC reactivity to OH approximately doubled during this episode, with similar distribution between functional groups, but showing a temperature dependent contribution from biogenic isoprene (maximum 1.2 ppbv). Under episodic conditions total peroxy radicals in excess of 60 pptv were observed in late afternoon with strong correlation to a later and higher peak in ozone. Episodic alkyl peroxy radicals were calculated to be substantially influenced by peroxy acetyl, via the thermal dissociation of PAN at high temperatures.

AB - A wide range of chemical and physical parameters has been observed over the course of a severe Europe-wide air pollution episode in August 2003. Detailed surface observations made at the rural perimeter edge of London, UK, indicated significantly elevated levels of primary volatile organic compounds (VOCs), ozone (>110 ppbV), other photochemical by-products such as PAN, HCHO, and oxygenates but not NOx. Reactive tracers in combination with Doppler wind radar and back trajectories have been used to establish that initial morning rises in O3 during the episode were caused by entrainment of air from aloft, polluted on regional scales from mainland Europe. Total VOC reactivity to OH approximately doubled during this episode, with similar distribution between functional groups, but showing a temperature dependent contribution from biogenic isoprene (maximum 1.2 ppbv). Under episodic conditions total peroxy radicals in excess of 60 pptv were observed in late afternoon with strong correlation to a later and higher peak in ozone. Episodic alkyl peroxy radicals were calculated to be substantially influenced by peroxy acetyl, via the thermal dissociation of PAN at high temperatures.

UR - http://www.scopus.com/inward/record.url?scp=33750348205&partnerID=8YFLogxK

U2 - 10.1016/j.atmosenv.2006.06.057

DO - 10.1016/j.atmosenv.2006.06.057

M3 - Article

AN - SCOPUS:33750348205

SN - 1352-2310

VL - 40

SP - 7598

EP - 7613

JO - Atmospheric Environment

JF - Atmospheric Environment

IS - 39

ER -

Ozone photochemistry and elevated isoprene during the UK heatwave of August 2003

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