HOx concentrations and OH reactivity observations in New York City during PMTACS-NY2001

Xinrong Ren; Hartwig Harder; Monica Martinez; Robert L. Lesher; Angelique Oliger; Terry Shirley; Jennifer Adams; James B. Simpas; William H. Brune

doi:10.1016/S1352-2310(03)00460-6

HO_x concentrations and OH reactivity observations in New York City during PMTACS-NY2001

Xinrong Ren, Hartwig Harder, Monica Martinez, Robert L. Lesher, Angelique Oliger, Terry Shirley, Jennifer Adams, James B. Simpas, William H. Brune

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153 Scopus citations

Abstract

Hydroxyl (OH) and hydroperoxy (HO₂) radicals (collectively called HO_x) were measured by a laser-induced fluorescence instrument during the PMTACS-NY (PM2.5 Technology Assessment and Characterization Study-New York) intensive campaign in New York City in summer 2001. Measurement results for OH and HO₂ are presented for the month-long study. The detection limits were about 3.0×10⁵cm^-3 for OH and 2.5×10⁶cm^-3 (∼0.1ppt) for HO₂ with a 1-min integration time and a 2σ confidence level. The daytime maximum concentrations were 5-20×10⁶cm^-3 for OH and 0.4-6×10⁸cm^-3 (2-24pptv) for HO₂, usually appearing later than the peak of ozone photolysis frequency, J(O¹D). Relative high OH and HO₂ persisted into early evening and were frequently observed during nighttime. The ratios of HO₂ to OH were typically between 5 and 40, which are smaller than those obtained in relatively clean environments. The OH reactivity, measured by an instrument named total OH loss rate measurement was on average 19±3s^-1 in this urban environment. It was the highest in the morning and the lowest in the afternoon. The comparison of measured OH and HO₂ with model calculations is given in a companion paper (OH and HO₂ chemistry in the urban atmosphere of New York City, Atmospheric Environment (2003a) this issue).

Original language	English (US)
Pages (from-to)	3627-3637
Number of pages	11
Journal	Atmospheric Environment
Volume	37
Issue number	26
DOIs	https://doi.org/10.1016/S1352-2310(03)00460-6
State	Published - Aug 2003

All Science Journal Classification (ASJC) codes

Environmental Science(all)
Atmospheric Science

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@article{8fdb3671a77d484a9501dd1a36f57339,

title = "HOx concentrations and OH reactivity observations in New York City during PMTACS-NY2001",

abstract = "Hydroxyl (OH) and hydroperoxy (HO2) radicals (collectively called HOx) were measured by a laser-induced fluorescence instrument during the PMTACS-NY (PM2.5 Technology Assessment and Characterization Study-New York) intensive campaign in New York City in summer 2001. Measurement results for OH and HO2 are presented for the month-long study. The detection limits were about 3.0×105cm-3 for OH and 2.5×106cm-3 (∼0.1ppt) for HO2 with a 1-min integration time and a 2σ confidence level. The daytime maximum concentrations were 5-20×106cm-3 for OH and 0.4-6×108cm-3 (2-24pptv) for HO2, usually appearing later than the peak of ozone photolysis frequency, J(O1D). Relative high OH and HO2 persisted into early evening and were frequently observed during nighttime. The ratios of HO2 to OH were typically between 5 and 40, which are smaller than those obtained in relatively clean environments. The OH reactivity, measured by an instrument named total OH loss rate measurement was on average 19±3s-1 in this urban environment. It was the highest in the morning and the lowest in the afternoon. The comparison of measured OH and HO2 with model calculations is given in a companion paper (OH and HO2 chemistry in the urban atmosphere of New York City, Atmospheric Environment (2003a) this issue).",

author = "Xinrong Ren and Hartwig Harder and Monica Martinez and Lesher, {Robert L.} and Angelique Oliger and Terry Shirley and Jennifer Adams and Simpas, {James B.} and Brune, {William H.}",

note = "Funding Information: The authors would like to thank Kenneth Demerjian for asking us to participate in PMTACS-NY2001. We also thank all the other researchers for their kind cooperation during this field campaign. Two anonymous reviewers are acknowledged for providing insightful comments and suggestions. This work was supported by NSF (ATM-9974335), the New York State Energy Research and Development Authority (NYSERDA) (contract ♯ 4918ERTERES99), the US Environmental Protection Agency (EPA) (cooperative agreement ♯ R828060010), and New York State Department of Environmental Conservation (NYS DEC) (contract ♯ C004210). Although the research described in this article has been funded in part by the US Environmental Protection Agency, it has not been subjected to the Agency's required peer and policy review and, therefore, does not necessary reflect the views of the Agency and no official endorsement should be inferred. ",

year = "2003",

month = aug,

doi = "10.1016/S1352-2310(03)00460-6",

language = "English (US)",

volume = "37",

pages = "3627--3637",

journal = "Atmospheric Environment",

issn = "1352-2310",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - HOx concentrations and OH reactivity observations in New York City during PMTACS-NY2001

AU - Ren, Xinrong

AU - Harder, Hartwig

AU - Martinez, Monica

AU - Lesher, Robert L.

AU - Oliger, Angelique

AU - Shirley, Terry

AU - Adams, Jennifer

AU - Simpas, James B.

AU - Brune, William H.

N1 - Funding Information: The authors would like to thank Kenneth Demerjian for asking us to participate in PMTACS-NY2001. We also thank all the other researchers for their kind cooperation during this field campaign. Two anonymous reviewers are acknowledged for providing insightful comments and suggestions. This work was supported by NSF (ATM-9974335), the New York State Energy Research and Development Authority (NYSERDA) (contract ♯ 4918ERTERES99), the US Environmental Protection Agency (EPA) (cooperative agreement ♯ R828060010), and New York State Department of Environmental Conservation (NYS DEC) (contract ♯ C004210). Although the research described in this article has been funded in part by the US Environmental Protection Agency, it has not been subjected to the Agency's required peer and policy review and, therefore, does not necessary reflect the views of the Agency and no official endorsement should be inferred.

PY - 2003/8

Y1 - 2003/8

N2 - Hydroxyl (OH) and hydroperoxy (HO2) radicals (collectively called HOx) were measured by a laser-induced fluorescence instrument during the PMTACS-NY (PM2.5 Technology Assessment and Characterization Study-New York) intensive campaign in New York City in summer 2001. Measurement results for OH and HO2 are presented for the month-long study. The detection limits were about 3.0×105cm-3 for OH and 2.5×106cm-3 (∼0.1ppt) for HO2 with a 1-min integration time and a 2σ confidence level. The daytime maximum concentrations were 5-20×106cm-3 for OH and 0.4-6×108cm-3 (2-24pptv) for HO2, usually appearing later than the peak of ozone photolysis frequency, J(O1D). Relative high OH and HO2 persisted into early evening and were frequently observed during nighttime. The ratios of HO2 to OH were typically between 5 and 40, which are smaller than those obtained in relatively clean environments. The OH reactivity, measured by an instrument named total OH loss rate measurement was on average 19±3s-1 in this urban environment. It was the highest in the morning and the lowest in the afternoon. The comparison of measured OH and HO2 with model calculations is given in a companion paper (OH and HO2 chemistry in the urban atmosphere of New York City, Atmospheric Environment (2003a) this issue).

AB - Hydroxyl (OH) and hydroperoxy (HO2) radicals (collectively called HOx) were measured by a laser-induced fluorescence instrument during the PMTACS-NY (PM2.5 Technology Assessment and Characterization Study-New York) intensive campaign in New York City in summer 2001. Measurement results for OH and HO2 are presented for the month-long study. The detection limits were about 3.0×105cm-3 for OH and 2.5×106cm-3 (∼0.1ppt) for HO2 with a 1-min integration time and a 2σ confidence level. The daytime maximum concentrations were 5-20×106cm-3 for OH and 0.4-6×108cm-3 (2-24pptv) for HO2, usually appearing later than the peak of ozone photolysis frequency, J(O1D). Relative high OH and HO2 persisted into early evening and were frequently observed during nighttime. The ratios of HO2 to OH were typically between 5 and 40, which are smaller than those obtained in relatively clean environments. The OH reactivity, measured by an instrument named total OH loss rate measurement was on average 19±3s-1 in this urban environment. It was the highest in the morning and the lowest in the afternoon. The comparison of measured OH and HO2 with model calculations is given in a companion paper (OH and HO2 chemistry in the urban atmosphere of New York City, Atmospheric Environment (2003a) this issue).

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DO - 10.1016/S1352-2310(03)00460-6

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SN - 1352-2310

VL - 37

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JO - Atmospheric Environment

JF - Atmospheric Environment

IS - 26

ER -

HO_x concentrations and OH reactivity observations in New York City during PMTACS-NY2001

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