Influence of trees on the outdoor thermal environment in subtropical areas: An experimental study in Guangzhou, China

Zheng, Senlin; Guldmann, Jean‐Michel; Liu, Zhixin; Zhao, Lihua

doi:10.1016/j.scs.2018.07.025

Cited by 103 publications

(31 citation statements)

References 31 publications

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“…leaf or crown temperature, leaf area index, stomatal conductance, evapotranspiration rate), determinants and quantification of tree cooling capacity, tree shade effects and so on. Surface temperatures of trees and green spaces are typically 10-20 °C lower than those of sealed ground or built surfaces exposed to sunlight in summer, leading to a significant reduction of mean radiant temperature [13][30] [31]. Leuzinger et al [30] reported tree crown temperatures of ten common tree species planted in Central European cities and declared that tree surface temperatures were circa -1 to +4 °C higher than the ambient temperature.…”

Section: List Of Symbolsmentioning

confidence: 99%

“…Zölch et al [35] showed that planting trees had the strongest impact with an average physiological equivalent temperature reduction of 13% compared with existing vegetation. Zheng et al [31] measured the influence of trees on the outdoor thermal environment in subtropical areas through field tests of relevant physiological indices and microclimatic parameters. They found that the widely planted fig tree Ficus microcarpa had the best cooling performance among four tree species studied, with the maximum reduction of physiological equivalent temperature due to the highest leaf area index (LAI).…”

Section: List Of Symbolsmentioning

confidence: 99%

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Infrared radiative performance of urban trees: spatial distribution and interspecific comparison among ten species in the UK by in-situ spectroscopy

Pickles

Smith

Shao

2020

Building and Environment

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Section: List Of Symbolsmentioning

confidence: 99%

Section: List Of Symbolsmentioning

confidence: 99%

Infrared radiative performance of urban trees: spatial distribution and interspecific comparison among ten species in the UK by in-situ spectroscopy

Pickles

Smith

Shao

2020

Building and Environment

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“…Also, it was the same with some of the zones previously discussed, which stated that the presence of vegetation had a significant effect on differences, in thermal comfort. Trees produced a significant increase in human thermal comfort, due to the fact that they reduced and absorbed solar radiations, which were used to reap water on the leaves (Oke, 1987;Zheng et al, 2018). As observed in Table 4, PMV at the two points had a very significant difference, due to the radiation received also being different.…”

Section: Parking Zone (Par)mentioning

confidence: 99%

Investigating outdoor thermal comfort of educational building complex in urban area: A case study in Universitas Kebangsaan, Bandung city

Ramadhan¹,

Jurizat²,

Syafrina³

et al. 2021

Geographica Pannonica

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Campus building was a place to accommodate various educational activities, which were both carried out indoors and outdoors. The environment, including the building and its exterior, provided thermal comfort that was influenced by the context, such as the mass of the facility, vegetation, and constructing envelope materials. The microclimate also influenced the environment, such as temperature, wind speed, and humidity. This study aimed to investigate the outdoor thermal comfort of campus building in urban area during summer, while also identifying the influential factors. This research referred to a case study, examining the thermal quality of the educational building environment using ENVI-met software, based on the Predicted Mean Vote (PMV) index as an indicator of outdoor thermal comfort, in Universitas Kebangsaan (UK). The results showed that the outdoor environment had low thermal comfort conditions during the day, as it also had different thermal satisfactory situations, due to differences in physical characteristics in each zone. This characteristics included, (1) The SVF determinant as indicators of the shading factor should be supported by the presence of vegetation and the use of pavement material, (2) Although the wind speed factor does not really affect the thermal comfort in the outdoor space, the interconnection between open gaps is likely to make breeze distribution in the area better. This study offered direction for campus planning, in order to maintain the optimal capacity of the natural environment, such as (1) Strategizing to create a better shadowing factor in the outer space, which was supported by controlling the use of pavement materials, (2) Directing the density of buildings by making open spaces more permeable, in order for better wind distribution in the area. From this study, the campus current conditions and future design development potential was also observed.

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“…Moreover, Srivanit’s study confirmed that every 20% increase in tree coverage ratio caused a decrease in air temperature, with a maximum reduction of 2.7 °C on average [20]. As indicated by Zheng’s study, the greater a plant’s leaf area density, the stronger the attenuation of solar radiation [21]. Shashua-Bar’s research supportively showed that the average air temperature can be reduced by 2.5 °C in a space with a high green coverage ratio in summer (sufficient greening by trees and grassland combined) [22].…”

Section: Introductionmentioning

confidence: 96%

Field Study on the Microclimate of Public Spaces in Traditional Residential Areas in a Severe Cold Region of China

Lin

Jin

Jiang

2019

IJERPH

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As residential environment science advances, the environmental quality of outdoor microclimates has aroused increasing attention of scholars majoring in urban climate and built environments. Taking the microclimate of a traditional residential area in a severe cold city as the study object, this study explored the influence of spatial geometry factors on the microclimate of streets and courtyards by field measurements, then compared the differences in microclimate of distinct public spaces. The results are as follows. (1) The temperature of a NE-SW (Northeast-Southwest) oriented street was higher than that of a NW-SE (Northwest-Southeast) oriented street in both summer and winter, with an average temperature difference of 0.7–1.4 °C. The wind speeds in the latter street were slower, and the difference in average wind speed was 0.2 m/s. (2) In the street with a higher green coverage ratio, the temperature was much lower, a difference that was more obvious in summer. The difference in mean temperature was up to 1.2 °C. The difference in wind speed between the two streets was not obvious in winter, whereas the wind speed in summer was significantly lower for the street with a higher green coverage ratio, and the difference in average wind speed was 0.7 m/s. (3) The courtyards with higher SVF (sky view factor) had higher wind speeds in winter and summer, and the courtyards with larger SVF values had higher temperatures in summer, with an average temperature difference of 0.4 °C. (4) When the spaces had the same SVF values and green coverage ratios, the temperature of the street and courtyard were very similar, in both winter and summer. The wind speed of the street was significantly higher than the courtyard in summer, and the wind speed difference was 0.4 m/s.

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Influence of trees on the outdoor thermal environment in subtropical areas: An experimental study in Guangzhou, China

Cited by 103 publications

References 31 publications

Infrared radiative performance of urban trees: spatial distribution and interspecific comparison among ten species in the UK by in-situ spectroscopy

Infrared radiative performance of urban trees: spatial distribution and interspecific comparison among ten species in the UK by in-situ spectroscopy

Investigating outdoor thermal comfort of educational building complex in urban area: A case study in Universitas Kebangsaan, Bandung city

Field Study on the Microclimate of Public Spaces in Traditional Residential Areas in a Severe Cold Region of China

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