Abstract
Work and leisure in outdoor spaces influences people’s physiological and psychological, while it can also lead to a reduction of energy consumed via air conditioning and lighting. In this study, the effects of solar radiation shading by trees in the open space around buildings on microclimatic development and pedestrian radiation environment are evaluated through a case study on the redevelopment buildings in front of Central Osaka Station, based on both observation and calculation. In both open space and green garden, direct solar radiation is shielded mainly by the buildings located behind the trees rather than by the trees themselves. Solar radiation shielding by trees is necessary in the range of more than 10 m from the south side of the buildings and more than 6 m from the west or east sides of the buildings.
Highlights
In certain areas, global warming and the urban heat island effect can expose people living in cities to intense heat
While various mitigation measures of global warming and the urban heat island phenomenon have already been implemented, adaptation measures that improve the human thermal environment are noted since the effect of global warming is a concern in the future
Outdoor thermal comfort in urban street canyons with various shapes and orientations has been studied by Ali-Toudert et al [5,6], who found that shading is the key strategy for mitigating heat stress outdoors under hot summer conditions
Summary
Global warming and the urban heat island effect can expose people living in cities to intense heat. While various mitigation measures of global warming and the urban heat island phenomenon have already been implemented, adaptation measures that improve the human thermal environment are noted since the effect of global warming is a concern in the future. Several studies have been carried out with the aim of improving the thermal environment and air quality in urban canopy areas.
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