Tree crown traits and planting context contribute to reducing urban heat

Sharmin, Mahmuda; Tjoelker, Mark G.; Pfautsch, Sebastian; Esperón-Rodríguez, Manuel; Rymer, Paul D.; Power, Sally A.

doi:10.1016/j.ufug.2023.127913

Cited by 11 publications

(3 citation statements)

References 57 publications

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“…It is noteworthy that the cooling effect on asphalt motorway can reach up to 30.28 • C, while it can reach up to 24.5 • C on laid pedestrian roads. Moreover, Sharmin et al find that trees are capable of cooling black surfaces down to 28.1 • C [49]. This difference may be due to the fact that the summer maximum temperature in their studied city ranged from 28-30 • C, whereas in Hangzhou, where this study was conducted, the summer maximum temperature can exceed 40 • C. During our experiment, the highest temperature reached 39 • C, demonstrating that trees provide better cooling effects on high-temperature asphalt surfaces.…”

Section: Discussionmentioning

confidence: 99%

Cooling Effect of Trees with Different Attributes and Layouts on the Surface Heat Island of Urban Street Canyons in Summer

Shen¹,

Zhang²,

Wu³

et al. 2023

Atmosphere

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In recent years, the impact of surface heat islands in urban street canyons has become increasingly apparent. However, the research on the use of trees to mitigate surface heat islands remains limited. To address this gap, this study combines experiments and simulations to analyze the cooling effect of trees on surface temperatures under varying timeframes and layouts in an east–west street canyon. The results reveal that the temperature of the road decreases by 10–15 °C, which is 2–4 times greater than that on the south side. Moreover, at 5:00 p.m. in the afternoon, the cooling effect on the south side is 10.3 °C, which is twice that of the north side. In practical planning and design, the diameter of the tree canopy should be maximized, and trees with leaf-area densities greater than 1.5 m2/m3 should be selected. Additionally, the layout of trees should be optimized to maximize the tree canopy coverage. These findings have important implications for optimizing plant selection and placement in street canyons.

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Section: Discussionmentioning

confidence: 99%

Cooling Effect of Trees with Different Attributes and Layouts on the Surface Heat Island of Urban Street Canyons in Summer

Shen¹,

Zhang²,

Wu³

et al. 2023

Atmosphere

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“…From a data perspective, the smart manufacturing process can be divided into seven parts: data acquisition, transmission, storage, preprocessing, analysis, visualization, and application. The primary data in the intelligent manufacturing process are processing parameters and equipment data, such as cutting speed, feed speed, feed distance, and cutting depth (Sharmin et al, 2023). Data such as quality control, inventory, process, procedure, and personnel are also critical in an intelligent management program.…”

Section: Research Methodology 31 Digital Framework For Smart Manufact...mentioning

confidence: 99%

Digital Smart Manufacturing Context Urban Street Space Design Landscape Elements Retrofit Analysis

Song

2023

EAI Endorsed Trans Energy Web

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INTRODUCTION: With the growth of the economic level, China's urban residents' urban living standards are also increasingly high, which has produced the story of an urban street space design to improve the requirements. Moreover, with intelligent manufacturing and other computer technology to enhance the efficiency of various industries, smart manufacturing applied to urban spatial design landscapes also has a prototype. OBJECTIVES: To improve the level of digitization in China, the application of intelligent manufacturing in urban street space design; to promote the transformation of urban landscape elements, urban modernization will increase the level; to solve the problem of the urban environment improvement and economic development is not synchronized; to promote the modernization of urban development, enhance the level of urban informatization and intelligence. METHODS: Firstly establishes the Wells equation of the optimal path of intelligent manufacturing through the technique of theoretical exposition; secondly, analyzes people's demand for urban street space design by using the method of data statistics and analysis; lastly, summarizes the principles to be followed in the creation of urban street space and the construction outlook through case study. RESULTS: The Wells equation of the optimal path of smart manufacturing shows that intelligent manufacturing has a significant positive effect on the efficiency of urban street space design; the results of data statistics and analysis show that the current level of urban street space design cannot meet people's growing spiritual and cultural needs; the results of the case study show that the design of urban street space should follow the design principles of safety, closeness to nature, and human-centeredness. CONCLUSION: Urban street space design in the context of digital intelligent manufacturing should be done promptly, and the level of urban landscape design should be strengthened to meet people's growing spiritual and cultural needs in the post-New Crown epidemic era.

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“…In addition, the size of the crown and the CVI are also inseparable from exploring the ecological benefits of urban trees [43]. For example, trees with dense (high LAI) and wide canopies are beneficial for mitigating urban heat [44]. The CVI can also reflect the damage to Picea abies caused by environmental pollution [45].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Crown Volume Increment in Street Trees among Six Cities in Western Countries and China

Guo,

Hu,

Qin

et al. 2024

Horticulturae

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The tree crown volume (CV), as a major indicator in the evaluation of ecological environment quality, can assess the health and carbon sequestration of urban trees. In this study, a new low-cost method, the plane calculation of angle disparity (PCAD), was employed to obtain the CV in China using satellite images from Google Earth. Meanwhile, primary data on street trees from four Western cities were acquired from online datasets. Nonparametric statistical methods showed no significant difference in CV per street tree between Beijing and Shanghai in China, ranging from 10 to 150 m3, almost one-seventh of that in the four cities (Paris and London in Europe and Los Angeles and Seattle in America). The CV of Platanus acerifolia in Paris and London exhibited values five times higher than those in Beijing and Shanghai. The annual crown volume increment (CVI) was less than 5 m3 in Beijing and Shanghai, significantly lower than in Seattle (66.55 m3). The purpose of the research was to verify the operability of the PCAD and compare the CVI in different cities all over the world, providing new ideas for urban tree management and carbon sequestration evaluation and a basis for government decision making in areas with a low CVI.

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Tree crown traits and planting context contribute to reducing urban heat

Cited by 11 publications

References 57 publications

Cooling Effect of Trees with Different Attributes and Layouts on the Surface Heat Island of Urban Street Canyons in Summer

Cooling Effect of Trees with Different Attributes and Layouts on the Surface Heat Island of Urban Street Canyons in Summer

Digital Smart Manufacturing Context Urban Street Space Design Landscape Elements Retrofit Analysis

Comparison of Crown Volume Increment in Street Trees among Six Cities in Western Countries and China

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