Measurement of total OH reactivity by laser-induced pump and probe technique-comprehensive observations in the urban atmosphere of Tokyo

Ayako Yoshino*, Yasuhiro Sadanaga, Keisuke Watanabe, Shungo Kato, Yuko Miyakawa, Jun Matsumoto, Yoshizumi Kajii

*この研究の対応する著者

研究成果: Article査読

60 被引用数 (Scopus)

抄録

Total OH reactivity was observed by use of the laser-induced pump and probe technique, and the urban air quality in Tokyo was diagnosed comprehensively. The concentrations of NOx, CO, O3, non-methane hydrocarbons (NMHCs) and oxygenated volatile organic compounds (OVOCs) were observed simultaneously. The observations were conducted in July and August 2003, and in January, February, May, and November 2004. Generally, the observed OH reactivity was higher than the calculated values derived using the observed concentrations of the trace species. The differences between the observed and calculated values in summer, spring, and autumn were approximately 30%. However, the difference in winter was smaller than those in the other seasons. In addition, while the differences observed in summer, spring, and autumn correlated with the total reactivity of the OVOCs (Σi kOVOCi[OVOCi](s-1), ki is rate constant of its compounds with OH), the correlations were not confirmed in the case of winter because atmospheric oxidation was less active and OVOCs levels were low in winter. These results suggest that the secondary products of the photochemical reactions in the atmosphere would be a missing sink for the OH loss process in the urban area.

本文言語English
ページ(範囲)7869-7881
ページ数13
ジャーナルAtmospheric Environment
40
40
DOI
出版ステータスPublished - 2006 12
外部発表はい

ASJC Scopus subject areas

  • 環境科学(全般)
  • 大気科学

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