Study on Microclimate and Thermal Comfort in Small Urban Green Spaces in Tokyo, Japan—A Case Study of Chuo Ward

Fuhao Sun, Junhua Zhang, Ruochen Yang, Shuhao Liu, Jia Ma, Xiaoke Lin, Daer Su, Kun Liu and Jingshu Cui ()
Additional contact information
Fuhao Sun: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan
Junhua Zhang: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan
Ruochen Yang: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan
Shuhao Liu: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan
Jia Ma: School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
Xiaoke Lin: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan
Daer Su: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan
Kun Liu: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan
Jingshu Cui: Graduate School of Horticulture, Chiba University, Matsudo 271-8510, Japan

Sustainability, 2023, vol. 15, issue 24, 1-19

Abstract: Small urban green spaces are abundant in densely populated urban areas, but little is known about their impact on the urban heat island effect and thermal comfort. Therefore, this study selected as research sites four small urban green spaces in a typical high-density built-up area, Chuo Ward in Tokyo, Japan. The ENVI-met software 5.1.1 simulation method was used to analyze these sites’ microclimate and thermal comfort conditions. The following are the results: (1) Small urban green spaces significantly reduce urban air temperatures, particularly during hot weather, with temperature reductions ranging from 2.40 °C to 2.67 °C, consistently lower than the highest temperatures in Tokyo’s Chuo Ward, mainly between 1:00 and 2:00 p.m. (2) Thermal comfort analysis indicates that small urban green spaces can significantly improve urban thermal comfort during the day, particularly around noon, by reducing one or two thermal comfort levels compared to typical urban street blocks. However, these differences gradually diminish throughout the evening and night, and thermal comfort inside and outside green spaces becomes more uniform. (3) Green space size is not the only factor influencing thermal comfort; the layout of plants within the green space and the layout of the surrounding buildings also have an impact. Despite their small size, even small green spaces can significantly enhance comfort. This study highlights the need to promote urban sustainability through the extensive integration of small green spaces in dense urban environments. Small green spaces can serve as a high-frequency, low-cost solution for environmental sustainability by addressing the increasingly severe urban heat island effect as well as environmental challenges that in the urbanization process.

Keywords: human thermal comfort; mini greenspace; microclimate; ENVI-met; urban parks (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/24/16555/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/24/16555/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:24:p:16555-:d:1294488

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().