{"title":"应对气候变化和城市化的城市潜热动态:全球阈值是多少?","authors":"","doi":"10.1016/j.jhydrol.2024.132002","DOIUrl":null,"url":null,"abstract":"<div><div>Urban latent heat is influenced by climate change-induced greening, CO<sub>2</sub> fertilization, and the urban heat island effect (Effect 1), which offsets reductions in latent heat caused by urbanization’s expansion of impermeable surfaces (Effect 2). The interaction between these effects remains unclear. The Hong Kong-Shenzhen region, characterized by a stable Leaf Area Index, intense anthropogenic activities, and abundant water resources, amplifies Effect 1. This region serves as an experimental site to explore global thresholds where these impacts reach equilibrium. Using Landsat and ERA5-Land data, monthly latent heat fluxes were computed from 1990 to 2019 using a stomatal process-based urban energy balance model. Shenzhen experienced a decline in latent heat (slope: −0.02), whereas Hong Kong showed an increase (slope: 0.08), confirming the presence of such thresholds. The region was segmented into 129 units, establishing a global benchmark indicating that Effect 1 significantly influences regional latent heat when the vegetation-to-impermeable surface ratio exceeds 2.71. Climate change impacts on Shenzhen’s latent heat increased by 94 %, compared to Hong Kong’s 55 %. Hong Kong demonstrates greater resilience to climate change than Shenzhen. This study underscores the importance of assessing urban dynamics for developing climate mitigation and sustainability strategies.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":null,"pages":null},"PeriodicalIF":5.9000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamics of urban latent heat in response to climate change and urbanization: What would be a global threshold?\",\"authors\":\"\",\"doi\":\"10.1016/j.jhydrol.2024.132002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Urban latent heat is influenced by climate change-induced greening, CO<sub>2</sub> fertilization, and the urban heat island effect (Effect 1), which offsets reductions in latent heat caused by urbanization’s expansion of impermeable surfaces (Effect 2). The interaction between these effects remains unclear. The Hong Kong-Shenzhen region, characterized by a stable Leaf Area Index, intense anthropogenic activities, and abundant water resources, amplifies Effect 1. This region serves as an experimental site to explore global thresholds where these impacts reach equilibrium. Using Landsat and ERA5-Land data, monthly latent heat fluxes were computed from 1990 to 2019 using a stomatal process-based urban energy balance model. Shenzhen experienced a decline in latent heat (slope: −0.02), whereas Hong Kong showed an increase (slope: 0.08), confirming the presence of such thresholds. The region was segmented into 129 units, establishing a global benchmark indicating that Effect 1 significantly influences regional latent heat when the vegetation-to-impermeable surface ratio exceeds 2.71. Climate change impacts on Shenzhen’s latent heat increased by 94 %, compared to Hong Kong’s 55 %. Hong Kong demonstrates greater resilience to climate change than Shenzhen. This study underscores the importance of assessing urban dynamics for developing climate mitigation and sustainability strategies.</div></div>\",\"PeriodicalId\":362,\"journal\":{\"name\":\"Journal of Hydrology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.9000,\"publicationDate\":\"2024-09-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Hydrology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022169424013982\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CIVIL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Hydrology","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022169424013982","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
Dynamics of urban latent heat in response to climate change and urbanization: What would be a global threshold?
Urban latent heat is influenced by climate change-induced greening, CO2 fertilization, and the urban heat island effect (Effect 1), which offsets reductions in latent heat caused by urbanization’s expansion of impermeable surfaces (Effect 2). The interaction between these effects remains unclear. The Hong Kong-Shenzhen region, characterized by a stable Leaf Area Index, intense anthropogenic activities, and abundant water resources, amplifies Effect 1. This region serves as an experimental site to explore global thresholds where these impacts reach equilibrium. Using Landsat and ERA5-Land data, monthly latent heat fluxes were computed from 1990 to 2019 using a stomatal process-based urban energy balance model. Shenzhen experienced a decline in latent heat (slope: −0.02), whereas Hong Kong showed an increase (slope: 0.08), confirming the presence of such thresholds. The region was segmented into 129 units, establishing a global benchmark indicating that Effect 1 significantly influences regional latent heat when the vegetation-to-impermeable surface ratio exceeds 2.71. Climate change impacts on Shenzhen’s latent heat increased by 94 %, compared to Hong Kong’s 55 %. Hong Kong demonstrates greater resilience to climate change than Shenzhen. This study underscores the importance of assessing urban dynamics for developing climate mitigation and sustainability strategies.
期刊介绍:
The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.