The impact of vegetation on urban microclimate to counterbalance built density in a subtropical changing climate

Duarte, Denise Helena Silva; Shinzato, Paula; Gusson, Carolina dos Santos; Alves, Carolina Abrahão

doi:10.1016/j.uclim.2015.09.006

Cited by 168 publications

(81 citation statements)

References 16 publications

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“…Simulation results showed a lower rate of change in both the warming-up (0.86 °C/h) and cooling-down periods (−0.39 °C/h). Previous studies have reported that ENVI-met produced time-series temperatures with lower variance [18,36], which could be explained by inaccuracies in simulation input for surface thermos-physical properties and vegetation conditions.…”

Section: The Study Area and Methodologymentioning

confidence: 99%

The Impact of Greenspace on Thermal Comfort in a Residential Quarter of Beijing, China

Kong

Wang

et al. 2016

IJERPH

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With the process of urbanization, a large number of residential quarters, which is the main dwelling form in the urban area of Beijing, have been developed in last three decades to accommodate the rising population. In the context of intensification of urban heat island (UHI), the potential degradation of the thermal environment of residential quarters can give rise to a variety of problems affecting inhabitants’ health. This paper reports the results of a numerical study of the thermal conditions of a residential quarter on a typical summertime day under four greening modification scenarios, characterized by different leaf area density (LAD) profiles. The modelling results demonstrated that vegetation could evidently reduce near-surface air temperature, with the combination of grass and mature trees achieving as much as 1.5 °C of air temperature decrease compared with the non-green scenario. Vegetation can also lead to smaller air temperature fluctuations, which contribute to a more stable microclimate. The Universal Thermal Climate Index (UTCI) was then calculated to represent the variation of thermal environment of the study area. While grass is helpful in improving outdoor thermal comfort, trees are more effective in reducing the duration and expansion of suffering from severe heat stress. The results of this study showed that proper maintenance of vegetation, especially trees, is significant to improving the outdoor thermal environment in the summer season. In consideration of the deficiency of the current code in the management of greenspace in residential areas, we hope the results reported here will help promote the improvement of the code and related regulations for greenspace management.

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Section: The Study Area and Methodologymentioning

confidence: 99%

The Impact of Greenspace on Thermal Comfort in a Residential Quarter of Beijing, China

Kong

Wang

et al. 2016

IJERPH

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“…Simulation results showed a lower rate of change in both the warmingup (0.86°C/hour) and cooling-down periods (−0.39°C/h). Previous studies have reported that ENVI-met produced temperatures with lower variance (Chow & Brazel, 2012;Duarte, Shinzato, Gusson, & Alves, 2015), which might be explained by inaccuracies in simulation input of surface thermos-physical properties and vegetation conditions. The root mean square error (RMSE), mean average error (MAE), mean bias error (MBE) and the index of agreement (d) were calculated to evaluate the simulation results accuracy.…”

Section: Model Validationmentioning

confidence: 94%

Optimizing the spatial arrangement of trees in residential neighborhoods for better cooling effects: Integrating modeling with in-situ measurements

Chen

2017

Landscape and Urban Planning

100

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A B S T R A C TTrees have long been recognized as effective for mitigating urban heat islands by reducing air temperature through evapotranspiration and intercepting shortwave radiation that heat up land surfaces. Many studies have shown that both the composition and configuration of vegetation can contribute to heat reduction at the city scale. Fewer studies, however, have focused on cooling mechanisms at the neighborhood scale. Here, we integrate modeling with in situ measurements to investigate how different spatial arrangements of trees in residential neighborhoods affect their cooling effects. We conducted the research in a residential neighborhood with high-rise apartment buildings in Beijing. We tested four scenarios with different spatial arrangements of trees, and quantified their effects on cooling. We used the high spatial and temporal resolution microclimate model ENVI-met and validated the model with in situ measurements. We found: (1) Different spatial arrangements had differentiated effects on intercepting shortwave radiation, which led to variations in air temperature. For example, new trees that were completely exposed to solar radiation had stronger cooling effects (air temperature was 0.22°C lower) than new trees that were located in the shadow of surrounding buildings. (2) Different spatial arrangements led to obviously different effects of sensible heat reduction, with a maximum difference of 14.84 × 10 8 J/ha. Our results underscore the importance of the spatial arrangement of trees on cooling in residential neighborhoods. These results have important implications in urban planning and design at the neighborhood scale.

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“…Estudios previos han demostrado que la vegetación es uno de las herramientas que logra disminuir el aumento de temperaturas Paolini (Paolini, 2012), Rojas Cortorreal, Roset y Navés (Rojas Cortorreal, Roset y Navés, 2013), Barradas (Barrandas, 2013), Skelhom, Lindley y Levermore (Skelhorn, Lindley y Levermore, 2014), Villanueva Solís (Villanueva Solís, 2014), Ballinas y Barradas (Ballinas y Barradas, 2015), Rojas Cortorreal, Roset y Navés (Rojas Cortorreal, Roset y Navés, 2015), Duarte et al (Duarte et al, 2015), Villalonga (Villalonga, 2016), Lindberg et al (Lindberg et al, 2016) y Rojas Cortorreal et al (Rojas Cortorreal et al, 2016). Investigaciones han demostrado que el paisajismo juega un rol importante a nivel urbano (Sabaté, 2013).…”

Section: Introductionunclassified

El efecto del confort térmico producido por la especie arbórea almez en el espacio público

Rojas-Cortorreal

Calzada

Viñas

et al. 2016

ACE: Architecture, City and Environment

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The impact of vegetation on urban microclimate to counterbalance built density in a subtropical changing climate

Cited by 168 publications

References 16 publications

The Impact of Greenspace on Thermal Comfort in a Residential Quarter of Beijing, China

The Impact of Greenspace on Thermal Comfort in a Residential Quarter of Beijing, China

Optimizing the spatial arrangement of trees in residential neighborhoods for better cooling effects: Integrating modeling with in-situ measurements

El efecto del confort térmico producido por la especie arbórea almez en el espacio público

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