Assessing the effects of landscape design parameters on intra-urban air temperature variability: The case of Beijing, China

Yan, Hai; Fan, Shanshan; Guo, Chenxiao; Wu, Fan; Zhang, Nan; Dong, Li

doi:10.1016/j.buildenv.2014.03.007

Cited by 127 publications

(54 citation statements)

References 41 publications

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“…During nighttime, however, this relationship was less significant (nighttime: R 2 = 0.18, p < 0.017). Other similar studies in Beijing and Tokyo actually showed phenomena opposite to the ones in this work [17,18]. In terms of vegetation, the LAI index of trees specifically (as opposed to shrubs or grass) provides shading which mitigates the effects of solar radiation; the transpiration of greenery can also reduce air temperature.…”

Section: Influence Of Land Cover Parameters On Temperaturecontrasting

confidence: 46%

“…The significant correlation between the air temperature in the night time and that in the day time implies that the urban morphology parameters affecting the temperature are the same for the night time and day time. On the contrary, weak correlation indicates that the distinct parameters mainly dominate the temperature in the day time or night time [17]. It can be seen in Figure 10 that the correlation between the temperature in the night time and that in the day time is rather weak (R 2 = 0.24, p = 0.009), which indicates there exist other parameters affecting the temperature.…”

Section: Discussionmentioning

confidence: 95%

“…In Beijing, Yan found that 75 m is the most significant radius [17]. The most significant radius in Singapore remains unclear, so we chose three radii to test the calculation impact on urban microclimate by comparison.…”

Section: Regression Analysis For Model Developmentmentioning

confidence: 99%

“…Sun [16] found that air temperature is significantly correlated with green ratio and building ratio during night hours in Taiwan. Yan et al [17] reported that increasing the percentage of vegetation cover can significantly decrease air temperature, while increase in building area significantly increases air temperature according to field measurements taken in Beijing. Yokobori [18] found that air temperatures vary significantly according to ambient land cover types; air temperatures decrease as the amount of vegetated area around various measurement sites in Japan increase.…”

Section: Introductionmentioning

confidence: 99%

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Assessing the Effects of Urban Morphology Parameters on Microclimate in Singapore to Control the Urban Heat Island Effect

et al. 2018

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Abstract:It is important to alleviate the "heat island effect" in urban areas, especially tropical cities. Microclimate is normally affected by the urban morphology parameters. The objective of this work is to investigate the correlation between air temperature variations and urban morphology parameters in tropical cities. Field measurement was carried out to record the air temperature at 27 points within an 8 km 2 urban area continuously in Singapore for one year. Geographical information system was applied to extract the urban morphology parameters. Generally, the maximum and minimum air temperature spatial differences in the study area ranged from 3.2 to 6.5 • C, indicating the significant effects of urban morphology on the air temperatures. Based on the fitting results of created multilinear regression models, parametric study has been performed to investigate the specific effects of urban morphology parameters on air temperatures. This work has proposed a much more precise regression model to predict the air temperature with various urban morphology parameters. In addition, meaningful value of reference has been offered for urban planners and landscape designers to effectively control the air temperature in tropical cities such as Singapore.

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Section: Influence Of Land Cover Parameters On Temperaturecontrasting

confidence: 46%

Section: Discussionmentioning

confidence: 95%

Section: Regression Analysis For Model Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessing the Effects of Urban Morphology Parameters on Microclimate in Singapore to Control the Urban Heat Island Effect

et al. 2018

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“…SVF controls the amount of global radiation that can reach a specific point in an urban canyon in the daytime and also represents the probability of radiative cooling during nighttime. A lower SVF represents more shading on the ground and a cooler environment in the daytime, but more radiation trapped at the nighttime [68]. Seasonally, a lower SVF impedes solar radiation and reduces space cooling energy consumption in summer; however, in winter, it would increase energy used for lighting and space heating.…”

Section: Space Enclosure Descriptorsmentioning

confidence: 99%

The Impact of Urban Design Descriptors on Outdoor Thermal Environment: A Literature Review

et al. 2017

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This paper presents a literature review on urban design indicators addressing the impact of urban geometry and vegetation on the outdoor thermal environment at the pedestrian level, as urban geometry and vegetation have been regarded as the most influential urban design factors that affect outdoor microclimate. The thermal balance concept is first introduced to elaborate how each component of energy fluxes is affected by the urban built environment, which helps to explore the underlying thermophysical mechanisms of how urban design modifies the outdoor thermal environment. The literature on numerous urban design descriptors addressing urban geometric characteristics is categorized into five groups in this paper according to the design features that the parameters entail, including land use intensity, building form, canyon geometry, space enclosure and descriptive characteristics. The literature on urban vegetation descriptors is reviewed together, followed by the combined effect of urban geometry and vegetation. This paper identifies a series of important urban design parameters and shows that the impact of design parameters on thermal environment varies with time, season, local climate and urban contexts. Contradictory impacts often occur between daytime and nighttime, or different seasons, which requests trade-offs to be achieved when proposing design strategies.

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Regional Variations in Temperatures

Shandas

Makido

Ferwati

2019

Urban Adaptation to Climate Change

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Assessing the effects of landscape design parameters on intra-urban air temperature variability: The case of Beijing, China

Cited by 127 publications

References 41 publications

Assessing the Effects of Urban Morphology Parameters on Microclimate in Singapore to Control the Urban Heat Island Effect

Assessing the Effects of Urban Morphology Parameters on Microclimate in Singapore to Control the Urban Heat Island Effect

The Impact of Urban Design Descriptors on Outdoor Thermal Environment: A Literature Review

Regional Variations in Temperatures

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