Vertical Structure of Cool Island in an Urban Green Park

DOI Web Site 7 Citations 12 References
  • SUGAWARA Hirofumi
    Department of Earth and Ocean Sciences, National Defense Academy of Japan
  • TANAKA Hiroharu
    Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
  • NARITA Ken-ichi
    Department of Architecture, Nippon Institute of Technology, Miyashiro
  • NAKANO Tomoko
    Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
  • MIKAMI Takehiko
    Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University

Bibliographic Information

Other Title
  • 都市内緑地におけるクールアイランドの鉛直構造
  • トシ ナイ リョクチ ニ オケル クールアイランド ノ エンチョク コウゾウ

Search this article

Abstract

 Synchronized kite-balloons measurements revealed the development of a nocturnal stable layer in an urban green park. The vertical structure of the park cool island is discussed. A stable layer developed in the park. In the surrounding urban area, neutral stratification was maintained all night. In spite of different weather conditions on the two nights measured, the park stable layer developed up to similar height (50 m). Three temperature profiles measured at a flat area in the park showed similar vertical gradients from surface to tree height (ca. 10 m). This means that the horizontal distribution of air temperature measured at the surface level represents the lowest 10 m of the atmospheric boundary layer.<br> Calm, clear sky conditions triggered the development of a colder layer in the park than the surrounding area. The maximum height of the colder layer was found to be 71 m. The cooling energy for cold air formation over park was estimated to be 5 Wm-2.

Journal

Citations (7)*help

See more

References(12)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top