Urban Climate最新文献_第10页

Characterization of trace elements in size-segregated atmospheric particles: Insights from SEM-EDS analysis 尺寸分离大气颗粒中微量元素的表征：来自SEM-EDS分析的见解

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-23 DOI: 10.1016/j.uclim.2025.102517

Orhan Sevimoğlu , S. Levent Kuzu

{"title":"Characterization of trace elements in size-segregated atmospheric particles: Insights from SEM-EDS analysis","authors":"Orhan Sevimoğlu , S. Levent Kuzu","doi":"10.1016/j.uclim.2025.102517","DOIUrl":"10.1016/j.uclim.2025.102517","url":null,"abstract":"<div><div>The use of scanning electron microscopy/energy-dispersive X-ray spectrometry (SEM-EDS) is an effective technique in analyzing the elemental contents of atmospheric particles and revealing their morphological structures. This study is to classify and quantify the elemental composition of PM<sub>10</sub> by analyzing size-segregated collected particles using SEM-EDS in Istanbul region. This study compared the changes in trace elements in size segregated PM<sub>10</sub> between the day of the Saharan dust event (SDE) day and the following dust-free day by determining them using SEM-EDS. In SEM images, the differences in the morphological structures of aerosol particles from different sources adhering to the glass filter fibers were clearly seen. The effective directions of particle transport were determined using HYSPLIT air mass backward trajectories for the airflows for both days. After the SDE, the 7.76-fold decrease in PM<sub>10</sub> concentration effectively demonstrates the effect on the transportation of desert dust to distant regions. Al, As, Ba, Ca, Cd, Cl, Cr, K, Mg, Na, Pb, S, Sb, Si, Ti, V and Zr were detected in the atmospheric particles by SEM-EDS. The SDE caused an increase in PM<sub>10</sub> concentration in the region as well as effected on the elemental composition of different size of the particles especially Ca, Mg and Ti. In contrast, Cl, Cr, S and V were the dominant elements in the dust-free day samples, each originating from urban sources. This study provides the qualitative measurement of the elements collected on the filter by SEM-EDS analysis in a short time with less experimental application.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102517"},"PeriodicalIF":6.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144366899","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}

引用次数: 0

Compound heat and ozone pollution in the urban environment 城市环境中的复合热和臭氧污染

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-21 DOI: 10.1016/j.uclim.2025.102511

Chenghao Wang , Xiao-Ming Hu , Sarah Feron , Jessica Leffel , Raúl R. Cordero

{"title":"Compound heat and ozone pollution in the urban environment","authors":"Chenghao Wang , Xiao-Ming Hu , Sarah Feron , Jessica Leffel , Raúl R. Cordero","doi":"10.1016/j.uclim.2025.102511","DOIUrl":"10.1016/j.uclim.2025.102511","url":null,"abstract":"<div><div>Ground-level ozone pollution and extreme heat are closely linked environmental stressors that often peak during similar warm-season conditions. Their co-occurrence as compound events can significantly amplify negative health impacts, particularly in densely populated urban areas. In this study, we systematically characterized the frequency, duration, and cumulative intensity of warm-season compound heat and ozone pollution events across all urban areas and their rural surroundings in the contiguous U.S. (CONUS), using long-term, high-resolution daily air temperature and pollution datasets. We found that urban heat waves, defined using daily maximum air temperature, were generally more frequent, more intense, and longer lasting than their rural counterparts, primarily due to the daytime urban heat island effect. In contrast, over half of the U.S. cities experienced fewer, less intense, and shorter ozone pollution episodes than nearby rural areas, largely reflecting differences in ozone chemical regimes. Despite these contrasting patterns, compound heat and ozone pollution events were more frequent in 88.8 % of urban areas, with higher cumulative heat and ozone pollution intensities in 91.1 % and 88.1 % of cities, respectively. However, compound event durations tended to be shorter in urban environments. These findings highlight the dependence of such compound events on local factors such as precursor emissions, as well as background conditions such as regional meteorological patterns, emphasizing the need for tailored mitigation strategies to simultaneously reduce heat stress and ozone pollution. This study also lays the foundation for detailed regional numerical simulations to elucidate the mechanisms that drive urban–rural disparities during these compound events.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102511"},"PeriodicalIF":6.0,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330027","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}

引用次数: 0

The multifactor coupling mechanism of local micro-environment on the spatiotemporal characteristics of atmospheric microplastics induced by sandstorms 局部微环境对沙尘暴大气微塑料时空特征的多因素耦合机制

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-20 DOI: 10.1016/j.uclim.2025.102501

Minyi Liu , Bowen Cui , Fang Yang , Yan Wang , Weixin Zhang , Yukun Wang , Zhifan Jin , Guoliang Lin

{"title":"The multifactor coupling mechanism of local micro-environment on the spatiotemporal characteristics of atmospheric microplastics induced by sandstorms","authors":"Minyi Liu , Bowen Cui , Fang Yang , Yan Wang , Weixin Zhang , Yukun Wang , Zhifan Jin , Guoliang Lin","doi":"10.1016/j.uclim.2025.102501","DOIUrl":"10.1016/j.uclim.2025.102501","url":null,"abstract":"<div><div>In April 2023, a severe sandstorm originating from Mongolia and the Taklimakan Desert significantly increased atmospheric particle concentrations in the southeastern coastal region thousands of kilometers away. Microplastics (MPs), characterized by their low density and diverse shapes, are capable of long-distance transport in the atmosphere. Two representative terrains—valley and island—were selected in the coastal city affected by the sandstorm. The study examined long-distance transport mechanisms of MPs and explored the influence of local micro-environments, including topography and meteorological factors, on the spatiotemporal distribution and transport dynamics of MPs during sandstorm events. The results indicated that during the sandstorm, MP abundance in the valley exhibited a significant time-lagged increase, whereas it decreased on the island. The sandstorm also introduced a higher proportion of rubber ploymers, larger particle sizes, and a greater diversity of plastic types. Meteorological analyses using NCL and HYSPLIT revealed that MPs were trans-boundary transported to coastal cities via high-altitude northwesterly airflow. The valley's canyon effect enhanced interactions between the northwesterly airflow and southeastern sea breezes, while updrafts contributed to the delayed increase in MP abundance in the valley. On the island, significant sea-land wind circulation and the development of vertical air currents, combined with cleaner local sources, resulted in lower MP abundance. These findings highlight the complex interplay between sandstorms and local micro-environments in shaping the transport and spatiotemporal dynamics of atmospheric MPs.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102501"},"PeriodicalIF":6.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330025","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}

引用次数: 0

Sea surface temperature impacts on tropical urban environment: A WRF modelling investigation 海洋表面温度对热带城市环境的影响：WRF模拟研究

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-20 DOI: 10.1016/j.uclim.2025.102502

M.O. Mughal , Vivek Kumar Singh , Alberto Martilli , Juan Angel Acero , Leslie K. Norford

{"title":"Sea surface temperature impacts on tropical urban environment: A WRF modelling investigation","authors":"M.O. Mughal , Vivek Kumar Singh , Alberto Martilli , Juan Angel Acero , Leslie K. Norford","doi":"10.1016/j.uclim.2025.102502","DOIUrl":"10.1016/j.uclim.2025.102502","url":null,"abstract":"<div><div>In recent times urban planners in dense cities have realized the negative impact of the urban heat island (UHI) phenomenon and its strong relation with climate change. Sea Surface Temperature (SST) significantly impacts the coastal urban environment, and a systematic error may adversely impact an urban thermal assessment. This study examines the role of SST during representative months in Singapore. It is found that the reanalysis SST synthesized with satellite SST indicates an improvement in RMSE up to 0.9 °C across representative seasons at station locations within the urban canopy. The systematic SST error leads to a variation in estimated UHI intensity by up to 0.3 °C, demonstrating its non-negligible impact. The highest spatial mean UHI intensity (2.9 °C) occurs at midnight in October while the lowest UHI (1.4 °C) occurs in February. The influence of sea breezes (under weak synoptic patterns in the Inter-Monsoon seasons) is analyzed to show relevant impact in the area close to the coastline. The results provide insights into the potential future impact of global warming and rising SST on Singapore's thermal environment. Adequate urban planning can promote ventilation paths starting in the coastline to further remove urban heat in inland locations.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102502"},"PeriodicalIF":6.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330026","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}

引用次数: 0

Transmissivity of solar radiation and the influence of diffuse radiation in different trees inside a tropical urban park 热带城市公园内不同树种的太阳辐射透过率及漫射辐射的影响

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-20 DOI: 10.1016/j.uclim.2025.102506

Juan A. Acero , Philip K. Kestel , Leslie K. Norford

{"title":"Transmissivity of solar radiation and the influence of diffuse radiation in different trees inside a tropical urban park","authors":"Juan A. Acero , Philip K. Kestel , Leslie K. Norford","doi":"10.1016/j.uclim.2025.102506","DOIUrl":"10.1016/j.uclim.2025.102506","url":null,"abstract":"<div><div>Trees are known to have a positive effect on the thermal environment of urban areas. However, different species have different impact in the local climate. In this work we present the results of a measurement campaign aiming to quantify the effect of different leaf structures on the solar transmissivity and the impact on mean radiant temperature as a relevant variable for thermal comfort. Six different trees have been assessed on different weather conditions. Sensors were deployed to measure air temperature, wind speed and direction, relative humidity, globe temperature and solar radiation (global and diffuse). Each day two trees were evaluated simultaneously with sensors under the tree crown and beside it (as a climatic reference site). The quantitative results show that the transmissivity of solar radiation through the tree's crown (varying between 9.4 % and 30.1 %) was influenced by the leaf structure and the sky view factor. Based on these, the impact of the direct and diffuse components of solar radiation on the tree transmissivity was different. A higher fraction of incoming diffuse radiation increased the transmissivity of solar radiation, especially for trees with low leaf area Index and high sky view factor. Overall, lower solar transmissivity, higher levels of incoming solar radiation and lower fraction of diffuse radiation caused a higher impact on mean radiant temperature under the tree crown, reaching a reduction of 27.0 °C. The outcomes of this work can influence decision-making in the context of improving thermal comfort through adequate management of greenery.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102506"},"PeriodicalIF":6.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322552","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}

引用次数: 0

Temperature as an urban metabolic indicator: Simulating spatial configurations in hot and arid neighborhoods 温度作为城市代谢指标：模拟炎热和干旱街区的空间配置

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-19 DOI: 10.1016/j.uclim.2025.102509

Tuffaha Anas, Sallay Ágnes

{"title":"Temperature as an urban metabolic indicator: Simulating spatial configurations in hot and arid neighborhoods","authors":"Tuffaha Anas, Sallay Ágnes","doi":"10.1016/j.uclim.2025.102509","DOIUrl":"10.1016/j.uclim.2025.102509","url":null,"abstract":"<div><div>Global temperatures are rising due to climate change, intensifying heat stress in urban areas. In hot, arid capitals such as Amman, exacerbated urban heat island effects threaten health, spike energy demand, and undermine socio-economic resilience. While large-scale interventions often exceed resource capacities in economically constrained contexts, neighborhood-scale spatial designs offer cost-effective pathways to modulate microclimates, a method common in urban metabolism studies focusing on air quality and climate as metabolic flows.</div><div>This study employs ENVI-met microclimate simulations at peak summer hours to quantify how spatial configurations (the existing baseline, green pockets and corridors, traditional courtyard blocks, and semi-superblocks) impact on potential air temperature within a typical urban block. We model adjacent 150 × 150 M zones in Amman's neighborhoods under identical meteorological inputs, focusing on the thermal response to vegetation layout, courtyard footprint, and asphalt removal strategies.</div><div>Findings reveal that transforming merely 5 % of the block area into green pockets instead of built area yields a mean temperature reduction of 1 °C. Courtyard-based building retrofits majorly enhanced interior thermal comfort with much less effect on the external streets. Notably, semi-superblock configurations had the largest impact by removing asphalt for pedestrianized zones, giving the best potential air temperature reduction result. Further analysis shows that air mixing dynamics underscore diminishing returns beyond the first asphalt increment, highlighting strategic removal over extensive clearance as the planner's priority.</div><div>By establishing quantitative benchmarks, our results guide planners toward resilient, people-centered urban designs that balance thermal, ecological, and socio-economic objectives in arid cities like Amman.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102509"},"PeriodicalIF":6.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322553","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}

引用次数: 0

Climate justice in urban public space adaptation: Developing and testing a collective assessment tool in hunters point, New York City 城市公共空间适应中的气候正义：在纽约市猎人点开发和测试一个集体评估工具

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-18 DOI: 10.1016/j.uclim.2025.102505

María Ruiz de Gopegui , Marta Olazabal , Vanesa Castán Broto , Timon McPhearson

{"title":"Climate justice in urban public space adaptation: Developing and testing a collective assessment tool in hunters point, New York City","authors":"María Ruiz de Gopegui , Marta Olazabal , Vanesa Castán Broto , Timon McPhearson","doi":"10.1016/j.uclim.2025.102505","DOIUrl":"10.1016/j.uclim.2025.102505","url":null,"abstract":"<div><div>Public spaces play a crucial role in climate action as the main setting of many urban adaptation interventions, while also critical for public life and social resilience. Public space is often contested since it can help develop justice-based urban climate adaptation, but can also drive different forms of injustice and maladaptation. Examining public space adaptation processes through the lens of climate justice is essential to identifying, learning from, and preventing maladaptation outcomes. However, there are currently no frameworks to facilitate the understanding of the relationship between climate justice and the design of public spaces or evaluation tools to assess its outcomes. To fill this gap, we developed and pilot-tested a new evaluation tool for the collective assessment of climate justice in already implemented public space design projects through a case study in Hunters Point South Park, New York City. While examining the particularities of this case, we also critically explore the potential and applicability of this assessment tool in other contexts and for broader justice assessments of urban adaptation interventions.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102505"},"PeriodicalIF":6.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306165","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}

引用次数: 0

Fine simulation and spatiotemporal analysis of urban PM2.5 using Mobile monitoring data 城市PM2.5移动监测数据精细模拟及时空分析

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-18 DOI: 10.1016/j.uclim.2025.102498

Daichao Li , Xinlei Jin , Fangnian Xu , Juanzhu Liang , Xiaohui Wang

{"title":"Fine simulation and spatiotemporal analysis of urban PM2.5 using Mobile monitoring data","authors":"Daichao Li , Xinlei Jin , Fangnian Xu , Juanzhu Liang , Xiaohui Wang","doi":"10.1016/j.uclim.2025.102498","DOIUrl":"10.1016/j.uclim.2025.102498","url":null,"abstract":"<div><div>Particulate matter with an aerodynamic diameter of 2.5 μm or less (PM<sub>2.5</sub>) concentrations exhibit significant spatiotemporal variability due to diverse urban scenarios, making accurate PM<sub>2.5</sub> simulation challenging. This study used PM<sub>2.5</sub> mobile monitoring data and considered the impact of urban scenarios on PM<sub>2.5</sub>. A hybrid PM<sub>2.5</sub> simulation model was developed by integrating the Multiscale Geographically Weighted Regression model (MGWR) and Extreme Gradient Boosting (XGBoost), referred to as MGWR-XGBoost. Nested buffer analysis, combined with feature importance and partial dependence plots, was employed to quantify the scale-dependent effects of urban scenarios on PM<sub>2.5</sub>. Additionally, spatiotemporal patterns of PM<sub>2.5</sub> concentrations across different urban scenarios were analyzed. The results showed that the MGWR-XGBoost model, which introduced urban scenario variables, achieved a mean improvement of 10.5 % in the coefficient of determination (R<sup>2</sup>) and a mean reduction of 1.52 μg/m<sup>3</sup> in the root mean square error (RMSE), thereby enabling intra-city PM<sub>2.5</sub> simulations at a spatial resolution of 100 m × 100 m. Quantitative analysis revealed that roads and industrial areas could influence PM<sub>2.5</sub> concentrations at a regional scale (1000–1500 m buffers), whereas residential areas, parks, sports services, and educational and medical units primarily exhibited more localized impacts (100–500 m buffers). Spatially, PM<sub>2.5</sub> concentrations in the study area exhibited a southeast-high, northwest-low pattern, with higher pollution in construction sites, roads, and heavy and light industrial areas. Temporally, PM<sub>2.5</sub> pollution levels across different urban scenarios exhibited a rise–fall–rise pattern. The findings provide support for fine-scale PM<sub>2.5</sub> monitoring, urban planning, and pollution control.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102498"},"PeriodicalIF":6.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306251","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}

引用次数: 0

Evaluation of low-temperature-related net mortality in southern urban China during the central-heating period in northern urban China 中国北方城市集中供暖期间南方城市低温相关净死亡率评估

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-18 DOI: 10.1016/j.uclim.2025.102504

Yi Huang , Weiwei Zhang , Fan Mao , Jinlei Qi , Maigeng Zhou

{"title":"Evaluation of low-temperature-related net mortality in southern urban China during the central-heating period in northern urban China","authors":"Yi Huang , Weiwei Zhang , Fan Mao , Jinlei Qi , Maigeng Zhou","doi":"10.1016/j.uclim.2025.102504","DOIUrl":"10.1016/j.uclim.2025.102504","url":null,"abstract":"<div><div>Low-temperature-related mortality risk is lower in northern China than in southern China owing to the winter central-heating policy. However, excess net mortality in southern China during the central-heating period remains uncertain. Daily all-cause and cause-specific mortality data were collected from 7,439,777 individuals in 179 rural and 121 urban areas between 2017 and 2021, ranging from the coldest to the hottest regions in China. A distributed lag non-linear model, meta-regression, and difference-in-differences method were used to analyze the data. The results showed that the attributable fraction of low temperature was similar in the non-central-heating period in northern and southern urban areas of China [North: 3.16 % (2.44 %–3.79 %), South: 3.05 % (2.28 %–3.82 %)] but different in the central-heating period [North: 5.56 % (4.33–6.68 %), South: 10.79 % (9.70–11.90 %)]. Of the total deaths in southern urban areas, 5.34 % could be attributed to a lack of central heating. People who live in the Middle Yangtze Plain, aged 80 years or more, and have cardiovascular disease, have a higher excess mortality risk. Heating infrastructure should be gradually developed in the southern China to mitigate the adverse effects of low temperatures in a future aging society.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102504"},"PeriodicalIF":6.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314285","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}

引用次数: 0

Mapping environmental influences on walking behavior across urban morphologies: A local climate zone-based study 绘制环境对城市形态步行行为的影响：基于局地气候带的研究

IF 6 2区工程技术

Urban Climate Pub Date : 2025-06-18 DOI: 10.1016/j.uclim.2025.102503

Bo Li, Hailu Zhang, Yuwen Yang

{"title":"Mapping environmental influences on walking behavior across urban morphologies: A local climate zone-based study","authors":"Bo Li, Hailu Zhang, Yuwen Yang","doi":"10.1016/j.uclim.2025.102503","DOIUrl":"10.1016/j.uclim.2025.102503","url":null,"abstract":"<div><div>Walking plays a critical role in promoting healthier and more sustainable cities, yet its environmental determinants are often examined without considering three-dimensional urban morphology. This study introduces a morphology-sensitive framework based on the Local Climate Zone (LCZ) classification to evaluate how built environment, climate, and air pollution factors jointly influence walking across distinct urban forms. Urban morphology is operationalized as a combination of building height and density, defined by the LCZ framework. Using large-scale walking trajectory data from Shenzhen, China, we applied Extreme Gradient Boosting (XGBoost) with SHAPley Additive exPlanations (SHAP) to identify key environmental factors at the citywide scale and across seven LCZ-defined morphological types.</div><div>Results reveal that environmental influences on walking vary significantly by urban morphology. In low-rise zones, walking is supported by transit access and walkability features, while natural environments such as NDVI and proximity to water play a minor role; air pollution increasingly constrains walking in high-density settings. Mid-rise medium-density zones present a transitional condition, where transit access, walkability features, and natural environments contribute positively, yet moderate suppression from air pollution and heat occurs. In contrast, high-rise areas experience strong compounded suppression from both air pollution and heat, while the benefits of green infrastructure become increasingly marginal.</div><div>These findings challenge the assumption of spatial uniformity in environment–walking relationships and highlight the moderating role of urban morphology. By integrating LCZ classification with interpretable machine learning, this study offers a novel approach to identify form-specific environmental constraints on walking, providing actionable insights for climate-adaptive urban design.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"62 ","pages":"Article 102503"},"PeriodicalIF":6.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305565","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}

引用次数: 0