Effects of large green park on urban atmospheric cooling during nighttime

  • Shigeta Yoshinori
    Department of Environment Systems, Faculty of Geo-environmental Science, Rissho University
  • Takaoka Toshiyuki
    Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science
  • Ohashi Yukitaka
    Department of Biosphere-Geosphere Science, Faculty of Biosphere-Geosphere Science, Okayama University of Science
  • Kikegawa Yukihiro
    Department of Interdisciplinary Science and Engineering, School of Science and Engineering, Meisei University
  • Hirano Yujiro
    Center for Social and Environmental Systems Research, National Institute for Environmental Studies

Bibliographic Information

Other Title
  • 都市内の大規模緑地がもたらす大気冷却効果
  • 都市内の大規模緑地がもたらす大気冷却効果 : 大阪城公園の事例
  • トシ ナイ ノ ダイキボ リョクチ ガ モタラス タイキ レイキャク コウカ : オオサカジョウ コウエン ノ ジレイ
  • —Meteorological observations around the Osaka Castle Park—
  • ―大阪城公園の事例―

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Abstract

The cool-island phenomena were observed at Osaka Castle Park on August 1-15, 2007. The surface-air temperature inside the park was nocturnally lower than that around urban areas. The cool-island intensity was more than +2.0°C during 4–5 JST. The cooler air generated inside the park extended downwind at the distance of about 250 m. Next, we compared the atmospheric cooling amounts on the forest area with that on the lawn area. As a result, it was suggested that the cooler air over the forest canopy subsided into and accumulated on the ground surface.<br>

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