Field study on green canopy as urban cool-spot

Hiroshi Miyazaki*, Masakazu Moriyama, Atsumasa Yoshida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In summer daytime, a space where covered by a green canopy is recognized cooler than its surroundings. The aim of this study is to determine the cooling effect of a green canopy of differing scales. In this paper, we define this kind of small and cooler space as a "Cool Spot". Some sets of meteorological elements were measured in Osaka in August 1992. The cooling effect of a large green canopy was remarkable (the minimum of ΔTg-u; the differential of air temperature between a Cool Spot and an urban area, was 1.2°C at the measurement in Run 2-7.) This cooling effect became more significant in the early morning (the minimum of ΔTg-u was 1.6°C in the early morning while that was 1.2°C in day time.) Under the smaller green canopy, air temperatures were higher than larger green canopies, however, surface temperatures were measured approximately equal to larger green canopies. In conclusion, it can be regarded the main difference of thermal priorities between a large green canopy and a small green canopy was the extent of an influence from an outer urban built-up area.

Original languageEnglish
Pages (from-to)51-56
Number of pages6
JournalNature and Human Activities
Issue number1
Publication statusPublished - 1996
Externally publishedYes


  • Cool-Spot
  • Cooling effects of a green canopy
  • Field survey
  • Urban thermal environment

ASJC Scopus subject areas

  • Environmental Science(all)


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