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Title: Effects of vertical greenery on mean radiant temperature in the tropical urban environment
Authors: Tan, C.L. 
Wong, N.H.
Jusuf, S.K.
Keywords: Geographical information systems
Mean radiant temperature
Outdoor thermal comfort
Urban vegetation
Vertical greenery
Issue Date: 2014
Citation: Tan, C.L., Wong, N.H., Jusuf, S.K. (2014). Effects of vertical greenery on mean radiant temperature in the tropical urban environment. Landscape and Urban Planning 127 : 52-64. ScholarBank@NUS Repository.
Abstract: Studies on vertical greenery generally focus on the measurement of air temperature, surface temperature and cooling load. There is a lack of information on how vertical greenery can influence outdoor thermal comfort. The objective of this study is to quantify the effects of mean radiant temperature (tmrt), as the first step towards determining the thermal quality of outdoor space due to installation of vertical greenery.The tmrt of two green walls (Green Wall A and Green Wall B) was measured up to 2m away at intervals of 0.5m. Two datasets were obtained, one consisting of tmrt, surface and air temperature collected from the two green walls and the second for just green wall A and the exposed concrete wall after Green Wall B was removed. tmrt was measured using customised globe thermometers calibrated for local use. Data was analysed using a GIS, thus enabling convenient visual comparison between tmrt profiles at different times. The diurnal tmrt profile was altered significantly due to the installation of vertical greenery. When both green walls were present the peak tmrt occurred at 15:00h, but with more concrete exposed when one wall was removed, the peak occurred at 17:00h and was 10.9-12.9° higher at 0.5m away from the wall. Vertical greenery thus helped to reduce tmrt both during the day and at night, to varying extents. The proposed methodology enables systematic quantification of the effects of vertical greenery on tmrt. © 2014 Elsevier B.V.
Source Title: Landscape and Urban Planning
ISSN: 01692046
DOI: 10.1016/j.landurbplan.2014.04.005
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