The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective
Urban thermal environment (UTE) issue has reduced the quality of life for residents, and urban green spaces (UGs) can effectively improve the UTE. However, at a fine scale, the cooling capacity of UGs with different structures and the diurnal variation still require in-depth study. This article, bas...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2024-01-01
|
| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10742412/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850162033169793024 |
|---|---|
| author | Shihao Wang Chaoyang Sun Lin Huang Huading Shi Xinliang Xu Dongrui Han Qingbao Gu Hanbing Liu |
| author_facet | Shihao Wang Chaoyang Sun Lin Huang Huading Shi Xinliang Xu Dongrui Han Qingbao Gu Hanbing Liu |
| author_sort | Shihao Wang |
| collection | DOAJ |
| description | Urban thermal environment (UTE) issue has reduced the quality of life for residents, and urban green spaces (UGs) can effectively improve the UTE. However, at a fine scale, the cooling capacity of UGs with different structures and the diurnal variation still require in-depth study. This article, based on land use, vegetation cover, ground elevation, anthropogenic heat emission, and meteorological data, utilizes the UrbClim model to simulate high-resolution hourly air temperature (Ta) in Tianjin's urban area during summer high-temperature days. It analyzes the structural characteristics of UGs at a fine scale and reveals the diurnal cooling effect variations among UGs with various structures. The results indicate that the Urban Heat Island (UHI) within Tianjin's urban area consists of a primary heat island and several smaller heat islands scattered around it. The northern part experiences higher Ta, while the southeastern part is cooler, with the highest daytime Ta ranging from 30.7 to 34.2 °C and the lowest nighttime Ta ranging from 26.0 to 31.7 °C. The structure of UGs significantly influences the spatial pattern and fluctuation of Ta. UGs with high coverage show a diminished cooling effect at night and can reduce the extent of daily Ta fluctuations, particularly when the greenery exceeds 80%, where the effect is most pronounced. The Ta stability of patchy and aggregated UGs is stronger than that of linear and scattered UGs. Vegetation types have different regulatory effects on diurnal Ta; during the day, trees have a more significant cooling effect than grasslands, while at night, this cooling effect is attenuated. Furthermore, the cooling benefits were amplified during extreme heat days. At the hottest time of the day, UGs with a high percentage of area, patchy and aggregated shape, and tree vegetation type have the best cooling effect, while at the coldest time of the night, these UGs slow down the dissipation of heat accumulated during the day and have a significant attenuation of the cooling effect. Our findings underscore the intricate relationships between the cooling effects and landscape structure of UGs, thereby aiding in the formulation of urban planning strategies to maximize the cooling benefits. |
| format | Article |
| id | doaj-art-46d773403b0b496a89d0c30b8d6b555c |
| institution | OA Journals |
| issn | 1939-1404 2151-1535 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj-art-46d773403b0b496a89d0c30b8d6b555c2025-08-20T02:22:40ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing1939-14042151-15352024-01-0117199431995410.1109/JSTARS.2024.349121910742412The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution PerspectiveShihao Wang0https://orcid.org/0000-0001-8091-4926Chaoyang Sun1https://orcid.org/0000-0002-7274-8857Lin Huang2https://orcid.org/0000-0003-0401-2781Huading Shi3Xinliang Xu4Dongrui Han5https://orcid.org/0000-0002-6206-3918Qingbao Gu6Hanbing Liu7State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, ChinaNational Climate Center, Beijing, ChinaKey Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, ChinaTechnical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, ChinaState Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, ChinaInstitute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, ChinaTechnical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, ChinaUrban thermal environment (UTE) issue has reduced the quality of life for residents, and urban green spaces (UGs) can effectively improve the UTE. However, at a fine scale, the cooling capacity of UGs with different structures and the diurnal variation still require in-depth study. This article, based on land use, vegetation cover, ground elevation, anthropogenic heat emission, and meteorological data, utilizes the UrbClim model to simulate high-resolution hourly air temperature (Ta) in Tianjin's urban area during summer high-temperature days. It analyzes the structural characteristics of UGs at a fine scale and reveals the diurnal cooling effect variations among UGs with various structures. The results indicate that the Urban Heat Island (UHI) within Tianjin's urban area consists of a primary heat island and several smaller heat islands scattered around it. The northern part experiences higher Ta, while the southeastern part is cooler, with the highest daytime Ta ranging from 30.7 to 34.2 °C and the lowest nighttime Ta ranging from 26.0 to 31.7 °C. The structure of UGs significantly influences the spatial pattern and fluctuation of Ta. UGs with high coverage show a diminished cooling effect at night and can reduce the extent of daily Ta fluctuations, particularly when the greenery exceeds 80%, where the effect is most pronounced. The Ta stability of patchy and aggregated UGs is stronger than that of linear and scattered UGs. Vegetation types have different regulatory effects on diurnal Ta; during the day, trees have a more significant cooling effect than grasslands, while at night, this cooling effect is attenuated. Furthermore, the cooling benefits were amplified during extreme heat days. At the hottest time of the day, UGs with a high percentage of area, patchy and aggregated shape, and tree vegetation type have the best cooling effect, while at the coldest time of the night, these UGs slow down the dissipation of heat accumulated during the day and have a significant attenuation of the cooling effect. Our findings underscore the intricate relationships between the cooling effects and landscape structure of UGs, thereby aiding in the formulation of urban planning strategies to maximize the cooling benefits.https://ieeexplore.ieee.org/document/10742412/Climate simulationlandscape structureurban green spaces (UGs)urban thermal environment |
| spellingShingle | Shihao Wang Chaoyang Sun Lin Huang Huading Shi Xinliang Xu Dongrui Han Qingbao Gu Hanbing Liu The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Climate simulation landscape structure urban green spaces (UGs) urban thermal environment |
| title | The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective |
| title_full | The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective |
| title_fullStr | The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective |
| title_full_unstemmed | The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective |
| title_short | The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective |
| title_sort | diurnal cooling effect of green space structure on the summer urban thermal environment from a high resolution perspective |
| topic | Climate simulation landscape structure urban green spaces (UGs) urban thermal environment |
| url | https://ieeexplore.ieee.org/document/10742412/ |
| work_keys_str_mv | AT shihaowang thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT chaoyangsun thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT linhuang thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT huadingshi thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT xinliangxu thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT dongruihan thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT qingbaogu thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT hanbingliu thediurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT shihaowang diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT chaoyangsun diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT linhuang diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT huadingshi diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT xinliangxu diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT dongruihan diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT qingbaogu diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective AT hanbingliu diurnalcoolingeffectofgreenspacestructureonthesummerurbanthermalenvironmentfromahighresolutionperspective |