Numerical Study on the Effect of Buildings on Temperature Variation in Urban and Suburban Areas in Tokyo

A numerical investigation of the temperature variation in urban and suburban areas due to the presence of buildings was carried out using a one-dimensional canopy model combined with a meso-scale meteorological model. Since temperature increases in an urban area are caused by sensible heat from building surfaces besides anthropogenic heat and reduction of wind speed due to buildings’ drag, we estimated each cause separately to determine the contribution by each to the temperature variation. The simulation was performed for Kanda, an urban area, and for Nerima, a suburban area of Tokyo. Comparisons were made with actual temperatures before the estimation. The comparison indicated that the measured temperatures in the Kanda and Nerima areas were nearly reproduced by the model. The sensitivity analysis indicated that, in a comparison with the temperature in no building environment, the contribution of (i) sensible heat flux from building surfaces to temperature rise was 49% in Kanda and 20% in Nerima, (ii) wind reduction due to drag was 41% in Kanda and 59% in Nerima, and (iii) the effect of the interaction between (I) and (II) was 10% in Kanda and 20% in Nerima.

Suggested citation or credit:

Tokairin, Takayuki . “Numerical Study on the Effect of Buildings on Temperature Variation in Urban and Suburban Areas in Tokyo .” Journal of the Meteorological Society of Japan . 84. no. 5 (2006): 921-937

Additional credits:

Hiroaki Kondo (National Institute of Advanced Industrial Science and Technology (AIST))

Hiroshi Yoshikado (National Institute of Advanced Industrial Science and Technology (AIST))

Yutaka Genchi (National Institute of Advanced Industrial Science and Technology (AIST))

Tomohiko Ihara (National Institute of Advanced Industrial Science and Technology (AIST))

Yukihiro Kikegawa (Meisei University)

Yujiro Hirano (Gunma University)

Kazutake Asahi (Mizuho Information & Research Institute Inc.)

Source: Journal of the Meteorological Society of Japan

Publication Date: July 2006

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