住宅街における冬季夜間の局所的冷気沈降とスカラー濃度プロファイルの形成機構

• 森脇 亮

  東京工業大学 理工学研究科土木工学専攻

• 神田 学

  東京工業大学 理工学研究科国際開発工学専攻

書誌事項

タイトル別名

• WINTERTIME PROFILES OF TEMPERATURE, CO<SUB>2</SUB>, AND WATER VAPOR AND LOCAL COLD-AIR SUBSIDENCE IN A RESIDENTIAL AREA

抄録

In this study we focused on the relationships between the vertical profiles of scalar within and above a suburban canopy and the cold-air subsidence locally generated within the canopy. The results were derived from the wintertime field measurements of the vertical profiles of CO₂, air temperature, water vapor, and turbulent flows, which were conducted in a residential area (the mean height of canopy is 7.3 m) of Tokyo, Japan. Under stably stratified conditions, the CO₂ concentration above the canopy decreased with height, while that within the canopy kept almost same level. This indicates that the CO₂ emitted from the houses accumulated within the canopy. Such behavior was not found in H₂O profile. The vertical profile of air temperature and observations on the surface temperature using a thermal infrared camera suggested that the cold air generated at roof level moved down to the ground level. The effect of ‘cold air subsidence’ within the canopy is the most plausible reason for the nighttime vertical profiles of CO₂ and H₂O.

収録刊行物

• 水工学論文集

  水工学論文集 50 493-498, 2006

  公益社団法人 土木学会

キーワード

• Vertical profile
• Carbon dioxide
• Urban canopy layer
• Urban roughness layer
• Turbulent exchange
• Cold-air pool

詳細情報

• CRID: 1390001205171554560
• NII論文ID: 130004043860
• DOI: 10.2208/prohe.50.493
• ISSN: 18849172
• ISSN: 09167374
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可