A study of relationships between isoprene, its oxidation products, and ozone, in the Lower Fraser Valley, BC

T. A. Biesenthal; Q. Wu; P. B. Shepson; H. A. Wiebe; K. G. Anlauf; G. I. Mackay

doi:10.1016/S1352-2310(96)00318-4

A study of relationships between isoprene, its oxidation products, and ozone, in the Lower Fraser Valley, BC

T. A. Biesenthal
, Q. Wu
, P. B. Shepson
, H. A. Wiebe
, K. G. Anlauf
, G. I. Mackay

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York University Toronto
Environment and Climate Change Canada
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Abstract

As part of the Pacific '93 Oxidant Study that took place in the summer in the Lower Fraser Valley of British Columbia, we conducted measurements of isoprene, and its oxidation products methyl vinyl ketone (MVK) and methacrolein (MACR) at a surface site about 40 km east of the city of Vancouver. Hourly measurements were conducted between 16 July and 10 August 1993. The data indicated evidence for substantial contributions of isoprene chemistry to the production of ozone during oxidant episodes in this region. Maximum concentrations of isoprene, MVK, and MACR were 5.3, 2.0, and 1.0 ppb, resp., for 4 August. Analysis of the relationship between MVK and O₃ during the oxidant episode period 1-6 August led to an estimated contribution of isoprene chemistry of ozone production of ≤ 13%. The average measured ratio of MVK/MACR was about 1.9-2.0 in the daytime, compared to the published relative yield of 1.4. Comparison of the MVK and MACR measurements to those of organic nitrates led to the conclusion that there is a significant non-photochemical source of MVK and MACR in this urban area.

Original language	English
Pages (from-to)	2049-2058
Number of pages	10
Journal	Atmospheric Environment
Volume	31
Issue number	14
DOIs	https://doi.org/10.1016/S1352-2310(96)00318-4
State	Published - Jul 1997

Keywords

Isoprene
Methacrolein
Methyl vinyl ketone
Oxidation products
Tropospheric ozone

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10.1016/S1352-2310(96)00318-4

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title = "A study of relationships between isoprene, its oxidation products, and ozone, in the Lower Fraser Valley, BC",

abstract = "As part of the Pacific '93 Oxidant Study that took place in the summer in the Lower Fraser Valley of British Columbia, we conducted measurements of isoprene, and its oxidation products methyl vinyl ketone (MVK) and methacrolein (MACR) at a surface site about 40 km east of the city of Vancouver. Hourly measurements were conducted between 16 July and 10 August 1993. The data indicated evidence for substantial contributions of isoprene chemistry to the production of ozone during oxidant episodes in this region. Maximum concentrations of isoprene, MVK, and MACR were 5.3, 2.0, and 1.0 ppb, resp., for 4 August. Analysis of the relationship between MVK and O3 during the oxidant episode period 1-6 August led to an estimated contribution of isoprene chemistry of ozone production of ≤ 13\%. The average measured ratio of MVK/MACR was about 1.9-2.0 in the daytime, compared to the published relative yield of 1.4. Comparison of the MVK and MACR measurements to those of organic nitrates led to the conclusion that there is a significant non-photochemical source of MVK and MACR in this urban area.",

keywords = "Isoprene, Methacrolein, Methyl vinyl ketone, Oxidation products, Tropospheric ozone",

author = "Biesenthal, \{T. A.\} and Q. Wu and Shepson, \{P. B.\} and Wiebe, \{H. A.\} and Anlauf, \{K. G.\} and Mackay, \{G. I.\}",

year = "1997",

month = jul,

doi = "10.1016/S1352-2310(96)00318-4",

language = "English",

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pages = "2049--2058",

journal = "Atmospheric Environment",

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TY - JOUR

T1 - A study of relationships between isoprene, its oxidation products, and ozone, in the Lower Fraser Valley, BC

AU - Biesenthal, T. A.

AU - Wu, Q.

AU - Shepson, P. B.

AU - Wiebe, H. A.

AU - Anlauf, K. G.

AU - Mackay, G. I.

PY - 1997/7

Y1 - 1997/7

N2 - As part of the Pacific '93 Oxidant Study that took place in the summer in the Lower Fraser Valley of British Columbia, we conducted measurements of isoprene, and its oxidation products methyl vinyl ketone (MVK) and methacrolein (MACR) at a surface site about 40 km east of the city of Vancouver. Hourly measurements were conducted between 16 July and 10 August 1993. The data indicated evidence for substantial contributions of isoprene chemistry to the production of ozone during oxidant episodes in this region. Maximum concentrations of isoprene, MVK, and MACR were 5.3, 2.0, and 1.0 ppb, resp., for 4 August. Analysis of the relationship between MVK and O3 during the oxidant episode period 1-6 August led to an estimated contribution of isoprene chemistry of ozone production of ≤ 13%. The average measured ratio of MVK/MACR was about 1.9-2.0 in the daytime, compared to the published relative yield of 1.4. Comparison of the MVK and MACR measurements to those of organic nitrates led to the conclusion that there is a significant non-photochemical source of MVK and MACR in this urban area.

AB - As part of the Pacific '93 Oxidant Study that took place in the summer in the Lower Fraser Valley of British Columbia, we conducted measurements of isoprene, and its oxidation products methyl vinyl ketone (MVK) and methacrolein (MACR) at a surface site about 40 km east of the city of Vancouver. Hourly measurements were conducted between 16 July and 10 August 1993. The data indicated evidence for substantial contributions of isoprene chemistry to the production of ozone during oxidant episodes in this region. Maximum concentrations of isoprene, MVK, and MACR were 5.3, 2.0, and 1.0 ppb, resp., for 4 August. Analysis of the relationship between MVK and O3 during the oxidant episode period 1-6 August led to an estimated contribution of isoprene chemistry of ozone production of ≤ 13%. The average measured ratio of MVK/MACR was about 1.9-2.0 in the daytime, compared to the published relative yield of 1.4. Comparison of the MVK and MACR measurements to those of organic nitrates led to the conclusion that there is a significant non-photochemical source of MVK and MACR in this urban area.

KW - Isoprene

KW - Methacrolein

KW - Methyl vinyl ketone

KW - Oxidation products

KW - Tropospheric ozone

UR - https://www.scopus.com/pages/publications/0030616196

U2 - 10.1016/S1352-2310(96)00318-4

DO - 10.1016/S1352-2310(96)00318-4

M3 - Article

AN - SCOPUS:0030616196

SN - 1352-2310

VL - 31

SP - 2049

EP - 2058

JO - Atmospheric Environment

JF - Atmospheric Environment

IS - 14

ER -

A study of relationships between isoprene, its oxidation products, and ozone, in the Lower Fraser Valley, BC

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Keywords

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