名古屋市における都市大気中メタン濃度変化と煙霧層形成の関係  [in Japanese] Relationship between Smog Layer Formation and Concentration Variation of Methane in Urban Atmosphere of Nagoya  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 伊藤 彰記 ITOH Akinori
    • 名古屋大学大学院工学研究科応用化学専攻 Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
    • 高橋 一郎 TAKAHAHSI Ichiro
    • 名古屋大学大学院工学研究科応用化学専攻 Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
    • 永田 陽子 [他] NAGATA Yoko
    • 名古屋大学大学院工学研究科応用化学専攻 Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
    • 千葉 光一 CHIBA Koichi
    • 名古屋大学大学院工学研究科応用化学専攻 Department of Applied Chemistry, Graduate School of Engineering, Nagoya University

Abstract

In order to elucidate the phenomenon that the atmospheric methane (CH<sub>4</sub>) concentration is higher in urban area, the influences of urban atmospheric structure on the temporal and geographical distributions of atmospheric CH<sub>4</sub> concentrations have been investigated in relation with the meteorological conditions by analyzing the continuous monitoring data in Nagoya City. When the CH<sub>4</sub> concentrations became higher in the downtown area during the daytime, the vertical profiles of potential temperature showed the stable atmospheric conditions above the urban area and the geographical distributions of wind speed and direction exhibited the stagnant atmospheric region around the urban surface area. These results suggested the stagnancy of a smog layer in the urban atmosphere. Statistical analysis of the concentrations of greenhouse gases (CO<sub>2</sub>, CH<sub>4</sub>) and air pollutants (CO, NMVOCs) as well as meteorological data through the year of 1995 also indicated that the concentration variation of CH<sub>4</sub> was deeply related to the smog layer formation under the stable atmospheric conditions. Thus, it is concluded that the higher concentration of CH<sub>4</sub> in urban area was observed even in the daytime when a smog layer was formed under fine weather and weak wind conditions.

Journal

  • Chikyukagaku

    Chikyukagaku 33(1), 55-64, 1999

    The Geochemical Society of Japan

References:  18

Codes

  • NII Article ID (NAID)
    110008679971
  • NII NACSIS-CAT ID (NCID)
    AN00141280
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    0386-4073
  • NDL Article ID
    4678677
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-645
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
Page Top