Urban Climate最新文献

{"title":"Designing and evaluating a Community-Centred Heat Early Warning System (CHEWS) for Nigerian slum communities","authors":"Olumuyiwa Bayode Adegun ,&nbsp;Tobi Eniolu Morakinyo ,&nbsp;Peter Elias","doi":"10.1016/j.uclim.2026.102793","DOIUrl":"10.1016/j.uclim.2026.102793","url":null,"abstract":"<div><div>Slum communities face critical risks from exposure to extreme temperatures, especially in sub Saharan Africa. This study evaluated the utilization of heat early warning resources, and developed and assessed a Community-Centered Heat Early Warning System (CHEWS) in selected slum communities in Akure, a secondary city, and Lagos, a megacity, in Nigeria using transdisciplinary and mixed-methods approaches. We conducted 637 community surveys (364 in Akure and 273 in Lagos) and focus group discussions to examine awareness levels, access barriers, dissemination preferences, and actions taken. The findings revealed that 64.47% of respondents in Lagos and 27.22% in Akure were unaware of available heat warnings, significantly affecting anticipatory actions. Access barriers include infrequent dissemination, language barriers, and technological limitations. Most residents preferred receiving heat warning information via radio (36.6%), in-person communication (24.5%), SMS (22.1%), and printed visual materials.</div><div>The Community Heat Early Warning System (CHEWS) was subsequently piloted in the two communities for 39 days across January and February 2024. HEATALERT (SMS) for “Hot,” “Very Hot,” or “Extremely Hot” conditions were sent on 74% of the days in Lagos, while Akure participants received “Very Warm” or “Hot” warnings on 71% of the days. Assessment through focus group discussions and semi-structured interviews indicated that CHEWS was well received, with suggestions for improvements and scaling up identified.</div><div>The research highlights the potential of a bottom-up approach for community engagement and proposes a hybrid top-down-bottom-up model for heat risk communication that combines national forecasts with community dissemination. This study empowers vulnerable urban settlements by enhancing their preparedness for extreme heat events, strengthening their resilience, and contributing to the achievement of the Sustainable Development Goals and the Sendai Framework for Disaster Risk Reduction targets.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102793"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147360536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying mobility-based seasonal individual heat exposure and the NEAP using multi-source spatiotemporal data","authors":"Yan Zhang ,&nbsp;Mei-Po Kwan ,&nbsp;Zhijie Zhang","doi":"10.1016/j.uclim.2026.102828","DOIUrl":"10.1016/j.uclim.2026.102828","url":null,"abstract":"<div><div>Under the dual drivers of global climate change and urbanization, heat waves have become one of the severe challenges to urban residents' health. This study investigates the neighborhood effect averaging problem (NEAP) across different socioeconomic status groups and seasons by integrating mobile phone signaling data, high-resolution land surface temperature remote sensing data, and cumulative exposure modeling. Using Hangzhou as the study area, we compared residents' mobility-based exposure (MBE) and residence-based exposure (RBE) based on mobility trajectory data from 5,747 (summer) and 6,167 (winter) residents. The study reveals: (1) Approximately 65% of residents experienced heat exposure mean reversion at both seasons, strongly validating the existence of the NEAP in heat exposure; (2) Human mobility behavior tends to reduce heat exposure levels in summer (MBE: 39.75°C, RBE: 39.85°C) while increasing exposure levels in winter (MBE: 13.89°C, RBE: 13.79°C); (3) Different socioeconomic status groups exhibited significantly different exposure patterns, with low socioeconomic status residents showing more pronounced NEAP in summer and the opposite in winter, while low SES groups faced higher heat exposure risks during summer. This study overcomes the limitations of traditional survey methods' insufficient spatial coverage and high costs, revealing the systematic regulatory effect of human mobility behavior on heat exposure. It also provides case evidence for developing social equity and urban climate adaptation policies.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102828"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146778222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Translating urban climate research into practice: Practitioner evidence from Hong Kong on formats, barriers and adoption","authors":"Yilin Lee,&nbsp;Edward Ng","doi":"10.1016/j.uclim.2026.102850","DOIUrl":"10.1016/j.uclim.2026.102850","url":null,"abstract":"<div><div>Translating urban climate science into standard design and planning remains difficult. This study examines the disconnect between research outputs and practitioner adoption in climate-responsive design (CRD), focusing on which knowledge formats and institutional supports enhance implementation. Survey data from 105 built environment professionals were analysed to determine how translational formats, technical accessibility, and institutional context influence perceived usefulness and CRD uptake, using principal component analysis, regression methods, and moderated mediation within a Technology Acceptance Model (TAM) framework.</div><div>Key findings are: (1) perceived usefulness is the strongest predictor of both adoption readiness and recent CRD implementation, underscoring its centrality in TAM; (2) resource and institutional barriers particularly cost, time, and insufficient code support significantly impede implementation; (3) increasing dissemination formats does not necessarily improve usefulness, as quality, scale-fit, interoperability, and workflow alignment are more important than quantity. Mediation analyses indicate format count has minimal indirect effect, and neither enhanced code support nor greater barrier burden alters the usefulness-to-outcome relationship.</div><div>Practical recommendations include developing a limited number of high-quality, decision-ready deliverables (e.g., rubrics, interoperable BIM components, maps) complemented by brief facilitation (tutorials, procurement templates, pilot projects) to reduce adoption friction and enable scalability. The importance of scale-matched outputs and discipline-specific workflows is emphasised. Limitations include cross-sectional design and purposive sampling, which constrain causal inference. Longitudinal or experimental studies are suggested for future research. By situating TAM within institutional and technical realities of urban climate practice, this study provides both theoretical insights and actionable guidance for advancing the integration of CRD.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102850"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147393074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The literature landscape on cities and climate change","authors":"Ayyoob Sharifi ,&nbsp;Karen C. Seto ,&nbsp;Prince Dacosta Aboagye","doi":"10.1016/j.uclim.2026.102849","DOIUrl":"10.1016/j.uclim.2026.102849","url":null,"abstract":"<div><div>The intersection of rapid urbanization and global climate change has sparked growing research interest. Using text mining and bibliometric methods, we analyzed over 60,000 articles from the Web of Science to identify key thematic areas and examine their interactions and evolution across different IPCC assessment report cycles. We also pinpointed emerging topics and patterns of international collaboration. The research landscape has evolved from an initial environmental focus to broader socio-economic and systemic perspectives. While mitigation has remained a consistent focus, considerable attention has shifted to risks and adaptation, particularly addressing heat- and flood-related challenges. Emerging issues that warrant further exploration include governance, AI and data-driven decision making, equity and social justice, compounding and cascading risks, and health. Despite the dominance of Anglophone countries and China, our analysis reveals an expanding network of collaborative research. However, countries in rapidly urbanizing regions, such as Africa, remain underrepresented.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102849"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147360531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A pathways framework for the climate change-mental health-violence nexus in informal settlements","authors":"Samantha C. Winter","doi":"10.1016/j.uclim.2026.102844","DOIUrl":"10.1016/j.uclim.2026.102844","url":null,"abstract":"<div><div>One billion people, globally, live in rapidly growing informal settlements, where residents are particularly vulnerable to climate change. Informal settlements, characterized by inadequate housing, insufficient living spaces, inadequate infrastructure and services, and insecure land tenure, are often located in ecologically sensitive areas prone to extreme weather events and natural disasters exacerbated by climate change. Rates of mental health disorders and interpersonal violence are higher in these settlements, and structural inequalities, including political, social and economic marginalization, limit residents' adaptation capabilities. Building on existing evidence, this review proposes a pathways framework of the effects of climate change on mental health and interpersonal violence in informal settlements, identifying critical mediators and moderators that shape the climate change-mental-health-violence nexus. The pathways identified provide targeted points for intervention and policy that have the potential for mitigating adverse impacts of climate change and building resilience in some of the world's most climate-vulnerable communities.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102844"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147278342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying ground temperature characteristics affected by underground buildings in spatial-temporal distributions","authors":"You Tang ,&nbsp;Yongqiang Luo ,&nbsp;Ling Zhang ,&nbsp;Jiang Chen ,&nbsp;Xudong Tang ,&nbsp;Zhenghong Wu","doi":"10.1016/j.uclim.2026.102802","DOIUrl":"10.1016/j.uclim.2026.102802","url":null,"abstract":"<div><div>Ecological and human environments face growing threats from the severe Subsurface Urban Heat Island (SUHI) effect, which simultaneously presents opportunities for shallow geothermal energy utilization. Underground buildings emerge as a key driver of ground temperature change—both the dynamic effects of underground buildings on ground temperature and their hourly spatial-temporal distribution remain poorly characterized. This knowledge gap not only restricts the efficient utilization of ground source heat pumps, but also causes unnecessary environmental pollution. In this context, this study simulates the dynamic effect of the water table, hydraulic head, and the geometric dimensions and temperature operation modes of underground buildings on the surrounding ground temperature field under the hydrogeological conditions of Beijing, China. Key findings include: (1) the influence of hydraulic gradient on ground temperature increases with horizontal distance, while soil thermal conductivity shows an asymmetric response to ±20% variation; (2) water table depth governs lateral thermal asymmetry, with higher water tables enhancing upstream–downstream temperature differences; (3) building width impacts vertical temperatures 2.4 times more than depth, while horizontal effects depend solely on depth; (4) building types induce distinct seasonal fluctuations, with amplitudes increasing over time and peaking in early spring; and (5) the interaction of geometric dimensions and temperature operation modes produces more pronounced and divergent ground temperature variations (+ 3.3 °C at 40 m depth, seasonal swing 11–22.5 °C) penetrating to 80 m depth. These insights contribute to mitigating SUHI and improving the utilization of geothermal resources.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102802"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interplay between anthropogenic emissions, monsoon circulation, and trace metal deposition in rainwater over a rapidly urbanizing region of southwestern India","authors":"Ranjeeta Dattatray Gawhane ,&nbsp;Mahesh Nikam ,&nbsp;Damodararao Karri ,&nbsp;Vinayak Waghmare ,&nbsp;Subrata Mukherjee ,&nbsp;Krishnakant Budhavant ,&nbsp;Naveen Gandhi ,&nbsp;Padmakumari Burrala","doi":"10.1016/j.uclim.2026.102851","DOIUrl":"10.1016/j.uclim.2026.102851","url":null,"abstract":"<div><div>The interplay between anthropogenic emissions and monsoonal circulation strongly influences the chemical composition and deposition of trace metals in tropical rainwater. This study examines the primary ionic and trace-metal composition of rainwater collected at Pune, south-western India, a rapidly urbanizing region within the southwest monsoon domain. A total of 63 samples were collected during 2024 and analyzed for major ions and 20 trace metals. Rainwater pH ranged from 4.3 to 7.0 (mean 5.9), indicating near-neutral to slightly acidic conditions. SO₄²⁻, NO₃⁻, and NH₄⁺ were the dominant ions, while Fe, Si, and Zn were the most abundant trace metals. Enrichment factor analysis revealed strong anthropogenic enrichment for Zn, Pb, Cd, and Cu, indicating substantial inputs from vehicular, industrial, and combustion activities. The Positive Matrix Factorization model resolved five source factors: metallurgical/industrial, secondary ammonium salts and regional combustion, crustal dust mixed with biomass-burning nitrate, vehicular non-exhaust and industrial emissions, and marine sea-salt aerosol. Among these, anthropogenic sources accounted for more than 60 % of total wet deposition. The findings demonstrate that the interplay between regional emission sources and monsoonal airflow strongly governs the chemistry and source contributions of rainwater. This study provides new insights into atmospheric deposition processes in rapidly urbanizing tropical environments, emphasizing the need for integrated air-quality and deposition monitoring under changing monsoon conditions.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102851"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147392695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of urban canopy on kinematic and boundary layer structures of the landfalling Typhoon Lekima (2019)","authors":"Xiangyu Ao ,&nbsp;Robert F. Rogers ,&nbsp;Huan-Cong Liu ,&nbsp;Hui Yu ,&nbsp;Wei Huang","doi":"10.1016/j.uclim.2026.102859","DOIUrl":"10.1016/j.uclim.2026.102859","url":null,"abstract":"<div><div>Tropical cyclones (TCs) may profoundly interact with highly urbanized surfaces during landfall due to accelerated coastal urbanization. However, the urbanization effects on the evolution of the boundary layer structure in TCs remains not well understood. This study employs a high-resolution numerical model to investigate the impacts of urbanization on the kinematic and boundary layer structure during tropical cyclone landfall, using Typhoon Lekima (2019) as a case study. Results indicate that both observations and simulations reveal a strong negative correlation between urban near-surface wind speeds and building morphological parameters, with the highest correlation coefficients found for building surface ratio. Urban surfaces weaken near-surface tangential winds over land but strengthen low-level radial inflow and deepen the inflow layer due to enhanced friction. Urbanization slightly accelerates the decay of typhoon intensity after landfall with the radius of maximum wind broadening by 10–15 km. Boundary layer wind asymmetry is primarily driven by sea-land contrast, though urban influence does provide an enhancement of inflow in the offshore rear-left quadrant by about 15%, intensifying secondary circulation that accelerates tangential winds in the onshore flow side by about 10%. Urbanization strengthens the inward gradient unbalanced force especially in the front-left quadrant, thereby promoting low-level convergence, potentially exacerbating localized wind disaster risks. Turbulent kinetic energy (TKE) surges in urban areas, particularly on the offshore-flow side, but drops sharply in the calmer eye region. These results highlight the dual role of urbanization and sea–land contrast in modulating TC boundary layer structures for coastal cities.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102859"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147409128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From green to spring: Enhancing urban temperature adaptation through a comprehensive ecological incentive","authors":"Ze Chen ,&nbsp;Bingqian Tu ,&nbsp;Jingqi Dang","doi":"10.1016/j.uclim.2026.102861","DOIUrl":"10.1016/j.uclim.2026.102861","url":null,"abstract":"<div><div>Although many studies examine afforestation and urban greening as nature-based solutions, rigorous causal evidence on large-scale, policy-driven ecological interventions for climate adaptation remains limited. Using county-level panel data from 2002 to 2020 and a staggered DID design, this study evaluates China's National Forest City Construction (NFCC) policy as a representative comprehensive ecological incentive. We find that NFCC significantly reduces mean temperature, heatwave frequency, and extreme heat days. NFCC also improves thermal stability by reducing temperature variability and increasing the number of thermally comfortable days. Effects are strongest in summer and in thermally stressed regions, and they are more pronounced in counties with weaker ecological endowments or stronger socioeconomic foundations. Mechanism evidence indicates that improved vegetation conditions and associated ecological functions underpin these cooling and heat-mitigation effects. Overall, the results highlight the adaptation value of policy-driven ecological governance.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102861"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147409158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simplified physiological equivalent temperature (PET) estimation formula for the climate of Taiwan","authors":"Yi-Chen Wu ,&nbsp;Andreas Matzarakis ,&nbsp;Tzu-Ping Lin","doi":"10.1016/j.uclim.2026.102841","DOIUrl":"10.1016/j.uclim.2026.102841","url":null,"abstract":"<div><div>At present, outdoor thermal comfort assessment based on the Physiologically Equivalent Temperature (PET) index largely relies on the RayMan Pro software. However, the operation of RayMan Pro requires comprehensive meteorological inputs, multiple parameter settings, and a certain level of professional expertise. These requirements pose challenges for non-expert users and consequently limit the broader dissemination and practical application of the PET concept.</div><div>To address these limitations, this study aims to develop simplified PET regression estimation formulas based on simulation results generated by RayMan Pro. Four key meteorological variables, namely solar radiation, air temperature, wind speed, and relative humidity, were parameterized to construct more than 640,000 simulated data combinations. Based on this dataset, regression models were developed and subsequently validated using observed meteorological data.</div><div>According to the regression analysis results, two simplified PET estimation formulas were proposed: Formula 1, which excludes relative humidity, and Formula 2, which includes relative humidity. The validation results indicate that Formula 1 achieves sufficient estimation accuracy under hot climatic conditions and can be effectively applied for PET estimation.</div><div>The simplified formulas proposed in this study can be applied to the generation of urban-scale PET spatial distribution maps, serving as practical tools for urban thermal environment planning and climate risk management. The findings provide an efficient approach for rapidly assessing heat stress risk under hot climatic conditions in Taiwan.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"66 ","pages":"Article 102841"},"PeriodicalIF":6.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147359644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}