Photochemical reactions in the urban air: Recent understandings of radical chemistry

Yasuhiro Sadanaga; Jun Matsumoto; Yoshizumi Kajii

doi:10.1016/S1389-5567(03)00006-6

Photochemical reactions in the urban air: Recent understandings of radical chemistry

Yasuhiro Sadanaga, Jun Matsumoto, Yoshizumi Kajii^*

^*Corresponding author for this work

Research output: Contribution to journal › Review article › peer-review

51 Citations (Scopus)

Abstract

In this review article, recent understandings of the urban atmosphere are briefly presented, focusing on NO_x (NO and NO₂), NO ₃ and HO_x (OH and HO₂), which are the key species for photochemical ozone production in the urban air. For NO_x chemistry, relationship between NO_x and HO_x, and photostationary state (PSS) of the conversion between NO and NO₂ are introduced with examples of recent research. Chemistry of nitrate radicals in the nighttime is also introduced. In addition, recent and representative techniques for the measurements of reactive nitrogen species in the troposphere are presented. As for HO_x radicals, important formation and loss processes and measurement methods developed recently are introduced. Recent campaign-based observations of HO_x radicals in the troposphere are also presented.

Original language	English
Pages (from-to)	85-104
Number of pages	20
Journal	Journal of Photochemistry and Photobiology C: Photochemistry Reviews
Volume	4
Issue number	1
DOIs	https://doi.org/10.1016/S1389-5567(03)00006-6
Publication status	Published - 2003 Apr 30
Externally published	Yes

Keywords

Hydroperoxy radical
Hydroxyl radical
Nitrate radical
Nitrogen oxides
Photochemical processes
Photostationary state
Tropospheric ozone
Urban air

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry
Organic Chemistry

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10.1016/S1389-5567(03)00006-6

Cite this

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title = "Photochemical reactions in the urban air: Recent understandings of radical chemistry",

abstract = "In this review article, recent understandings of the urban atmosphere are briefly presented, focusing on NOx (NO and NO2), NO 3 and HOx (OH and HO2), which are the key species for photochemical ozone production in the urban air. For NOx chemistry, relationship between NOx and HOx, and photostationary state (PSS) of the conversion between NO and NO2 are introduced with examples of recent research. Chemistry of nitrate radicals in the nighttime is also introduced. In addition, recent and representative techniques for the measurements of reactive nitrogen species in the troposphere are presented. As for HOx radicals, important formation and loss processes and measurement methods developed recently are introduced. Recent campaign-based observations of HOx radicals in the troposphere are also presented.",

keywords = "Hydroperoxy radical, Hydroxyl radical, Nitrate radical, Nitrogen oxides, Photochemical processes, Photostationary state, Tropospheric ozone, Urban air",

author = "Yasuhiro Sadanaga and Jun Matsumoto and Yoshizumi Kajii",

year = "2003",

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doi = "10.1016/S1389-5567(03)00006-6",

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T1 - Photochemical reactions in the urban air

T2 - Recent understandings of radical chemistry

AU - Sadanaga, Yasuhiro

AU - Matsumoto, Jun

AU - Kajii, Yoshizumi

PY - 2003/4/30

Y1 - 2003/4/30

N2 - In this review article, recent understandings of the urban atmosphere are briefly presented, focusing on NOx (NO and NO2), NO 3 and HOx (OH and HO2), which are the key species for photochemical ozone production in the urban air. For NOx chemistry, relationship between NOx and HOx, and photostationary state (PSS) of the conversion between NO and NO2 are introduced with examples of recent research. Chemistry of nitrate radicals in the nighttime is also introduced. In addition, recent and representative techniques for the measurements of reactive nitrogen species in the troposphere are presented. As for HOx radicals, important formation and loss processes and measurement methods developed recently are introduced. Recent campaign-based observations of HOx radicals in the troposphere are also presented.

AB - In this review article, recent understandings of the urban atmosphere are briefly presented, focusing on NOx (NO and NO2), NO 3 and HOx (OH and HO2), which are the key species for photochemical ozone production in the urban air. For NOx chemistry, relationship between NOx and HOx, and photostationary state (PSS) of the conversion between NO and NO2 are introduced with examples of recent research. Chemistry of nitrate radicals in the nighttime is also introduced. In addition, recent and representative techniques for the measurements of reactive nitrogen species in the troposphere are presented. As for HOx radicals, important formation and loss processes and measurement methods developed recently are introduced. Recent campaign-based observations of HOx radicals in the troposphere are also presented.

KW - Hydroperoxy radical

KW - Hydroxyl radical

KW - Nitrate radical

KW - Nitrogen oxides

KW - Photochemical processes

KW - Photostationary state

KW - Tropospheric ozone

KW - Urban air

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Photochemical reactions in the urban air: Recent understandings of radical chemistry

Abstract

Keywords

ASJC Scopus subject areas

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