能登半島珠洲におけるオゾンと一酸化炭素の濃度変動要因の解析  [in Japanese] Analyses of the concentration variations of ozone and carbon monoxide at Suzu, the Noto Peninsula  [in Japanese]

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Abstract

石川県能登半島珠洲で2008年12月からオゾンと一酸化炭素の測定を行い、東アジアの汚染された地域からの長距離輸送の観点から、季節変動・日内変動について解析を行った。オゾンと一酸化炭素濃度は、季節変動として春に高濃度、夏に低濃度となった。珠洲に到達する気塊を、後方流跡線解析を用いて、ロシア・中国・日本由来に分類したところ、春にロシアや中国からの大陸由来の割合が高くなり、夏に日本由来の割合が高くなった。区分別に見ると、中国由来の気塊が一年を通して高濃度となり、同じ大陸由来でも、ロシア由来の気塊は日本由来よりも低濃度になる傾向が見られた。日内変動を見ると、各月においてO<SUB>3</SUB>は日中の午後に最高値を示すが、COは一貫した変動を示さなかった。O<SUB>3</SUB>の日内最小値の月変動は、気塊の由来と長距離輸送中の光化学O<SUB>3</SUB>生成によるものであり、日中のO<SUB>3</SUB>増加量の月変動は、観測値近傍での光化学O<SUB>3</SUB>生成であると考えられた。また、日中のO<SUB>3</SUB>増加量と積算日射量との間には高く正の相関があることが明らかになった。

Ozone and carbon monoxide were simultaneously observed since December 2008 at Suzu, the Noto Peninsula. We investigated the seasonal and diurnal variations of their concentrations in view of the long-range transport of air pollutants from the Asian continent. The O<SUB>3</SUB> and CO concentrations had spring-peaks and a summer-minimum in their seasonal variations. The air mass arriving at Suzu was classified into sectors of Russia, China, and Japan using the backward trajectory analysis. In the spring, the fractions of continental origin, that is, the Russia and China air mass origins were high, while those of the Japan air mass origin were high in the summer. The air mass that originated from China had high concentrations for both O<SUB>3</SUB> and CO during the observational period. On the other hand, the concentrations from the Russian air mass origin were lower than those from the Japanese air mass origin, even though Russia and China are on the same continent. The averaged diurnal variation of O<SUB>3</SUB> showed a maximum peak in the afternoon, while that of CO did not show any systematic variation. The air mass origins and the photochemical O<SUB>3</SUB> production during the long-range transport would cause the seasonal variation in the diurnal minimum concentrations of O<SUB>3</SUB>. The monthly change of the O<SUB>3</SUB> increment in the daytime would indicate the photochemical O<SUB>3</SUB> production in the vicinity of the observational site. There was a high positive correlation between the O<SUB>3</SUB> increment in the daytime and integrated solar radiation.

Journal

  • Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi

    Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 45(6), 256-263, 2010-11-10

    Japan Society for Atmospheric Environment

References:  25

Cited by:  3

Codes

  • NII Article ID (NAID)
    10026966527
  • NII NACSIS-CAT ID (NCID)
    AN10512108
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13414178
  • NDL Article ID
    10899146
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-490
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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