Urban Climate最新文献_第8页

Transboundary air pollution in coastal urban area in Japan: Transport model and positive matrix factorization analysis for SPM-PM2.5 and PM2.5 日本沿海城市地区的跨界空气污染：SPM-PM2.5和PM2.5的运输模型和正矩阵分解分析

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102237

Kazunari Onishi , Keiya Yumimoto , Tomoaki Okuda , Akira Fukuike , Teruya Maki , Masanori Nojima , Masato Shinoda , Takeo Nakayama , Youichi Kurozawa , Zentaro Yamagata , Yasunori Kurosaki

{"title":"Transboundary air pollution in coastal urban area in Japan: Transport model and positive matrix factorization analysis for SPM-PM2.5 and PM2.5","authors":"Kazunari Onishi , Keiya Yumimoto , Tomoaki Okuda , Akira Fukuike , Teruya Maki , Masanori Nojima , Masato Shinoda , Takeo Nakayama , Youichi Kurozawa , Zentaro Yamagata , Yasunori Kurosaki","doi":"10.1016/j.uclim.2024.102237","DOIUrl":"10.1016/j.uclim.2024.102237","url":null,"abstract":"<div><div>Transboundary air pollutants have raised serious health concerns, particularly in regions with minimal local pollution sources. Distinguishing between local pollution and transboundary contributions is crucial for accurately assessing the health risks to local populations. This study aimed to analyze the differences in coarse and fine particulate matter and develop methods to obtain exposure data for epidemiological studies, thereby providing a scientific basis for public health interventions. We collected SPM-PM<sub>2.5</sub> (physically excluded PM<sub>2.5</sub> from SPM) and PM<sub>2.5</sub> samples in Yonago City, a coastal urban area in Tottori Prefecture, Japan, from 19 October 2015 to 25 July 2016 using a novel slit jet impactor (MCAS-SJ). Positive matrix factorization analysis used heavy metal, ion, and carbon concentrations to identify pollutant sources. This study identified four major air pollution events during the sampling period, primarily attributed to transboundary transport. Episode I was dominated by nitric aerosols, Episodes II and III by Asian dust, and Episode IV by sulfate aerosols. An analysis using global chemical transport models and backward trajectories confirmed that these events verified the contribution of transboundary pollution. In conclusion, identifying the impact of transboundary pollution on local air quality enables an accurate risk assessment of populations. This study provides scientific evidence for developing effective public health strategies and preventive measures. Additionally, the methodology used in this study holds the potential for international contributions and future research applications, helping to address air pollution challenges on a broader scale.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102237"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparing aerosol sources in a metallurgy city: Evidence from low molecular weight organic acids in PM2.5 between 2012–2013 and 2021–2022 冶金城市气溶胶来源比较：2012-2013年和2021-2022年PM2.5中低分子量有机酸的证据

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102279

Shan Liu , Kimitaka Kawamura , Bhagawati Kunwar , Ambarish Pokhrel , Changlin Zhan , Hongxia Liu , Jiaquan Zhang , Jihong Quan

{"title":"Comparing aerosol sources in a metallurgy city: Evidence from low molecular weight organic acids in PM2.5 between 2012–2013 and 2021–2022","authors":"Shan Liu , Kimitaka Kawamura , Bhagawati Kunwar , Ambarish Pokhrel , Changlin Zhan , Hongxia Liu , Jiaquan Zhang , Jihong Quan","doi":"10.1016/j.uclim.2024.102279","DOIUrl":"10.1016/j.uclim.2024.102279","url":null,"abstract":"<div><div>Understanding the decadal evolution of atmospheric pollutants is essential for evaluating environmental policies and their impact on air quality. This study examines changes in low molecular weight (LMW) dicarboxylic acids (diacids) and related compounds in PM<sub>2.5</sub> from 2012 –2013 to 2021–2022 in Huangshi, a metallurgy city in China. PM<sub>2.5</sub> and associated organic components, including total carbon (TC), LMW diacids, and α-dicarbonyls were halved over the decade. However, seasonal trends of diacids relative to TC remained similar, suggesting that anthropogenic, and biogenic emission activities and oxidation processes still strongly influence on organic species in the local PM<sub>2.5</sub>. During more recent years, we found increased relative abundances of short-chain diacids and related species (oxalic, malonic, succinic, glyoxylic, and pyruvic acids) in TC, whereas those of phthalic, terephthalic, adipic, azelaic, 9-oxononanoic acids and α-dicarbonyls decreased. These comparisons provide the first evidence for the decadal development of environmental policy, which caused a significant source change from anthropogenic to biogenic emissions along with photochemical aging of organic aerosols. We also suggest climate-related changes, including increased UV irradiation and ozone formation, resulting in an enhanced atmospheric oxidizing capability. This study will be useful for policymakers for the improvement of air quality and its outcomes in mining cities.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102279"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142918074","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

Spatiotemporal variability of the Universal Thermal Climate Index during heat waves using the UrbClim climate model: Implications for tourism destinations. 基于UrbClim气候模式的全球热气候指数在热浪期间的时空变化：对旅游目的地的影响。

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102281

David Hidalgo-García , Dimitra Founda , Hamed Rezapouraghdam

{"title":"Spatiotemporal variability of the Universal Thermal Climate Index during heat waves using the UrbClim climate model: Implications for tourism destinations.","authors":"David Hidalgo-García , Dimitra Founda , Hamed Rezapouraghdam","doi":"10.1016/j.uclim.2024.102281","DOIUrl":"10.1016/j.uclim.2024.102281","url":null,"abstract":"<div><div>There is a close relationship between tourism and climate, the latter being one of the most important factors influencing the choice of destination. Today, rising temperatures and extreme weather events pose significant risks to the tourism sector by affecting the safety and well-being of visitors. Urban tourism is particularly vulnerable due to the additive effect of the urban heat islands which exacerbate heat-related risk in cities. This research aims to examine the spatio-temporal variation of thermal conditions at Seville, a popular tourist destination in Spain, where the tourism sector represents 25 % of the gross domestic product. To this end, the Universal Thermal Climate Index (UTCI) and Landsat 8 images have been used, corresponding to August 2017, when the city experienced two heat waves and decreased number of visitors. Our results showed high variability of the UTCI between 28 and 39 °C corresponding to strong thermal stress that increased in the afternoon hours. During heat waves, this variability intensified by 9.77 %, reaching values between 32 and 42 °C corresponding to very strong thermal stress. Our findings show that adverse thermal conditions negatively affect tourist arrivals, which could lead to significant economic repercussions. Also, our results point to the urgent need for mitigation and resilience measures including the use of Blue Infrastructure (BI), new green areas, naturalizing streets, and use of green facades and roofs. These results will allow the development of adaptation and urban planning policies together with the development of resilience measures that improve the environmental comfort conditions of the historic center and therefore the visitors' experience.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102281"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939709","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 ecological risk due to suspended particulate matter-bound heavy metals deposited on selected plants in an urban area

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2025.102293

Durga Prasad Tripathi, Arvind Kumar Nema

{"title":"Evaluation of ecological risk due to suspended particulate matter-bound heavy metals deposited on selected plants in an urban area","authors":"Durga Prasad Tripathi, Arvind Kumar Nema","doi":"10.1016/j.uclim.2025.102293","DOIUrl":"10.1016/j.uclim.2025.102293","url":null,"abstract":"<div><div>Heavy metal concentrations bound to suspended particulate matter (SPM) originating from industrial processes, vehicular emissions, road dust, and solid waste incineration pose serious ecological risks. Their persistent deposition on vegetation disrupts the ecological balance and endangers environmental health through long-term accumulation in sensitive ecosystems. This study investigated the ecological risks posed by SPM-bound heavy metals (Ag, Cd, Bi, Pb, Ga, Co, Mn, Cu, Mo, Ni, V, Zn, and Cr) deposited on the leaves of selected plant species across Delhi, India, during pre- and post-monsoon. The assessment involved calculating the enrichment factor (EF), contamination factor (C<sub>f</sub>), contamination degree (C<sub>deg</sub>), potential ecological risk factor (E<sub>r</sub>), and potential ecological risk index (PER). Two-way ANOVA, Pearson's correlation, and Hierarchical Cluster Analysis (HCA) were employed for statistical analyses. The highest EF values were recorded for Co (11.23), Pb (3.26), and Ni (7.17) at the traffic-prone site in <em>Bougainvillea glabra</em>. Maximum C<sub>f</sub> values were observed for Cd (3.58) and Zn (11.17). The highest E<sub>r</sub> values were noted for Cd (158.34; <em>Ficus religiosa</em> L), Ni (5.89; <em>F. religiosa</em>), Pb (23.25; <em>Ficus benjamina</em> L), Cu (10.89; <em>F. benjamina</em>), and Zn (13.78; <em>B. glabra</em>). <em>F. religiosa</em> exhibited the highest PER of 199.39, while <em>B. glabra</em> showed the lowest of 110.17. Two-way ANOVA revealed significant differences (<em>p</em> < 0.05) in SPM-bound heavy metal concentrations. Cr exhibited positive correlations (0.358 ≤ <em>r</em> ≤ 0.817) with Ni, Pb, and Cu. Findings highlighted critical ecological risk from SPM-bound heavy metals in urban areas, necessitating suitable mitigation efforts.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102293"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143027311","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

Comparison of PM2.5 around 1893 elementary schools and kindergartens in Tehran over different time windows 不同时间窗下德黑兰1893年小学和幼儿园PM2.5的比较

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102249

Mohammad Khanizadeh , Kazem Naddafi , Masud Yunesian , Gerard Hoek , Ramin Nabizadeh , Helen Suh , Sadegh Niazi , Reza Bayat , Fatemeh Momeniha , Mohammad Sadegh Hassanvand , Sasan Faridi

{"title":"Comparison of PM2.5 around 1893 elementary schools and kindergartens in Tehran over different time windows","authors":"Mohammad Khanizadeh , Kazem Naddafi , Masud Yunesian , Gerard Hoek , Ramin Nabizadeh , Helen Suh , Sadegh Niazi , Reza Bayat , Fatemeh Momeniha , Mohammad Sadegh Hassanvand , Sasan Faridi","doi":"10.1016/j.uclim.2024.102249","DOIUrl":"10.1016/j.uclim.2024.102249","url":null,"abstract":"<div><div>We employed a land use regression (LUR) model to estimate ambient fine particulate matter (PM<sub>2.5</sub>) concentrations around elementary schools and kindergartens across Tehran, utilizing 138 predictor variables within buffers ranging from 100 to 2000 m. Among these, nine variables predicted the annual ambient PM<sub>2.5</sub> concentration around elementary schools and kindergartens. The model demonstrated acceptable performance, as indicated by the magnitude of the coefficients of determination (R<sup>2</sup> and adjusted R<sup>2</sup>) and validation metrics such as K-fold cross-validation (K-foldCV) and leave-one-out cross-validation (LOOCV). R<sup>2</sup>, adjusted R<sup>2</sup>, K-foldCV R<sup>2</sup> and LOOCV R<sup>2</sup> were 0.74 and 0.68, 0.68, and 0.55, respectively. The predictor variables included green space, population density, the distance to secondary roads, water channels, fuel/gas stations, main squares, the number of parking lots and mosques. There is a substantial spatial inequality in annual concentration of ambient PM<sub>2.5</sub> across Tehran as nearly all of the schools situated in the north experienced lower levels (< 35 μg/m<sup>3</sup>) compared with those in the south (> 40 μg/m<sup>3</sup>). This pattern observed for the Kindergartens across Tehran. Our findings highlight the importance of infrastructure design changes, such as expanding green spaces and relocating parking lots, to enhance air quality around schools and kindergartens.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102249"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867480","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

Combined effects of future urban development and rainfall patterns on flood characteristics in the Qinhuai River basin 未来城市发展与降雨模式对秦淮河流域洪水特征的综合影响

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102256

Yuqin Gao, Xilan Tan, Yunping Liu, Meijuan Xia, Xiao Chen

{"title":"Combined effects of future urban development and rainfall patterns on flood characteristics in the Qinhuai River basin","authors":"Yuqin Gao, Xilan Tan, Yunping Liu, Meijuan Xia, Xiao Chen","doi":"10.1016/j.uclim.2024.102256","DOIUrl":"10.1016/j.uclim.2024.102256","url":null,"abstract":"<div><div>The spatial patterns of urban development and storm characteristics significantly influence flood forecasting and early warning systems in watersheds. This study simulated the spatial distribution pattern of urban land cover under different future scenarios by coupling multi-objective programming (MOP) with the Path-Generating Land Use Simulation (PLUS) models. Then, the HEC-HMS model was used to analyze the response between urban spatial and storm patterns. Results indicated that natural environmental factors contributed significantly to cropland, forest, and grassland, while socioeconomic factors primarily influenced other land types. 6-h and daily rainfall data analysis consistently recognized common storm types—early, late, and mid-peak (Types I, II, and III). With increasing rainfall intensity, the peak flow of Type I occurs earlier. For all scenarios (Natural, Rapid urban, Ecological conservation, Coordinated development), Type II exhibited the highest peak flows, averaging 31.1 % and 8.5 % higher than Types I and III. Under the rapid urban development scenario, peak flow and volumes for all storm types were the highest. Urban development patterns significantly affected flood processes at the subbasin scale, while variations in rainfall patterns impacted the basin scale more significantly. Future urban planning should balance economic growth with ecological sustainability and guard against Type II rainfall patterns during flood prevention.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102256"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142888666","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

Comparing extreme rainfall exposure to climate-focused planning efforts: A mixed methods analysis in the northeastern United States 比较极端降雨暴露与以气候为重点的规划工作：美国东北部的混合方法分析

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102258

Naomi Miller , Donovan Finn , Kevin A. Reed

{"title":"Comparing extreme rainfall exposure to climate-focused planning efforts: A mixed methods analysis in the northeastern United States","authors":"Naomi Miller , Donovan Finn , Kevin A. Reed","doi":"10.1016/j.uclim.2024.102258","DOIUrl":"10.1016/j.uclim.2024.102258","url":null,"abstract":"<div><div>This paper analyzes the motivation for climate planning at the local level in three states in the northeastern United States. Cataloging climate-focused plans in 461 coastal and riverine municipalities in New York, New Jersey, and Connecticut we compare these efforts to the incidence of extreme precipitation from 2000 to 2021 based on climatologies of precipitation derived from a large-scale meteorological dataset. Localities' experience with extreme precipitation and their climate planning status is also compared with a selection of socio-demographic indicators. For the region analyzed, climate-focused planning is relatively rare, but coastal communities experienced more frequent extreme precipitation events and appear to have engaged in more climate-focused planning relative to riverine communities and also are more likely to cite scientific evidence of climate change as justification for planning. Notably, some coastal communities engaged in climate-related planning despite having a higher proportion of Republican voters, who are typically more conservative and skeptical of both climate change and public policy efforts to address it. Finally, some storms, even when not climatologically extreme, nonetheless leave a lasting impression because of their impacts. These have significant implications for local efforts to address climate challenges, showing how extreme climatological events may drive government decisions and highlighting additional factors that may also amplify or impede planning for climate change.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102258"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867476","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

Ambient temperature-related attributable risk for emergency asthma hospitalizations and length of stay in Hong Kong 环境温度与哮喘紧急住院的归因风险及在港逗留时间

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102240

Hong Qiu , Shengzhi Sun , Tze-Wai Wong , Xing Qiu , Kin-Fai Ho , Eliza Lai-Yi Wong

{"title":"Ambient temperature-related attributable risk for emergency asthma hospitalizations and length of stay in Hong Kong","authors":"Hong Qiu , Shengzhi Sun , Tze-Wai Wong , Xing Qiu , Kin-Fai Ho , Eliza Lai-Yi Wong","doi":"10.1016/j.uclim.2024.102240","DOIUrl":"10.1016/j.uclim.2024.102240","url":null,"abstract":"<div><div>We aimed to examine the association of ambient temperature with asthma exacerbations and assess the temperature-attributable disease burden changes. Daily count of asthma emergency hospitalizations and corresponding length of hospital stay, daily mean temperature, relative humidity, and air pollution concentrations from 2004 to 2019 in Hong Kong were collected. Time-series quasi-Poisson model integrated with the distributed-lag-nonlinear model was used to examine the relationships of temperature with asthma hospitalizations and length of stay. Measures of the risk attributable to nonoptimal temperature were calculated to summarize the disease burden and hospital utilization for periods of 2004–2011 and 2012–2019, respectively, and compared the temporal changes. Significantly higher risks at cold/cool temperatures for both admission counts and bed-days were found. Around 19.7 % (95 % CI: 14.1–24.3 %) of hospitalization counts and 22.6 % (95 % CI: 15.5–28.4 %) of bed-days were attributed to ambient temperature, which mainly occurred on cold and cool days. Compared with the early period of 2004–2011, the cold temperature-related attributable fraction in 2012–2019 decreased from 11.0 % to 8.9 % (<em>p</em> = 0.005) for admission counts but increased from 10.8 % to 12.6 % (<em>p</em> = 0.003) for bed-days. Hospital utilization and expenditure due to the longer hospital stays during cold days would play an adverse role in the healthcare system.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102240"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867487","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

Disentangling the non-linear relationships and interaction effects of urban digital transformation on carbon emission intensity 城市数字化转型对碳排放强度的非线性关系及交互效应分析

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2024.102283

Wentao Wang , Shenghua Zhou , Dezhi Li , Yang Wang , Xuefan Liu

{"title":"Disentangling the non-linear relationships and interaction effects of urban digital transformation on carbon emission intensity","authors":"Wentao Wang , Shenghua Zhou , Dezhi Li , Yang Wang , Xuefan Liu","doi":"10.1016/j.uclim.2024.102283","DOIUrl":"10.1016/j.uclim.2024.102283","url":null,"abstract":"<div><div>The inexorable rise of urban digital transformation (UDT) underscores the imperative of comprehending its complex relationships with carbon emissions intensity (CEI). Existing studies primarily focus on the linear relationships between individual UDT variables and CEI, overlooking non-linear dynamics and interactive effects, which may result in incomplete estimations. To address these gaps, this study develops an interpretable machine learning (IML) model that integrates machine learning (ML) techniques and SHAP (SHapley Additive exPlanations), to uncover the non-linear relationships and interaction effects of UDT on CEI. The results reveal the following: (1) The proposed IML model achieves high accuracy in modeling the relationships between multiple UDT variables and CEI (R<sup>2</sup> = 0.932, RMSE = 0.899, MAE = 0.543, 2); (2) Non-linear relationships between all UDT variables and CEI are confirmed, and two types of threshold points are identified where variable impacts shift from negative to positive and vice versa; (3) Interactive effects among UDT variables are examined, with thresholds quantified and U-shaped and inverted U-shaped trends identified. These findings provide a foundation for policymakers and urban managers to implement strategies that simultaneously advance digital transformation and promote low-carbon development.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102283"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939712","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

Impact of urban land use and anthropogenic heat on winter and summer outdoor thermal comfort in Beijing

IF 6 2区工程技术

Urban Climate Pub Date : 2025-02-01 DOI: 10.1016/j.uclim.2025.102306

Jiangkang Qian , Linlin Zhang , Uwe Schlink , Xinli Hu , Qingyan Meng , Jianfeng Gao

{"title":"Impact of urban land use and anthropogenic heat on winter and summer outdoor thermal comfort in Beijing","authors":"Jiangkang Qian , Linlin Zhang , Uwe Schlink , Xinli Hu , Qingyan Meng , Jianfeng Gao","doi":"10.1016/j.uclim.2025.102306","DOIUrl":"10.1016/j.uclim.2025.102306","url":null,"abstract":"<div><div>It is important to clarify the role of urbanization on outdoor thermal comfort (OTC) in regions threatened by both heat and cold. Quantitative studies on the impact of urbanization factors, including urban land use (LU) and anthropogenic heat (AH), on the winter thermal environment are lacking. This study conducted climate simulations using the Weather Research and Forecasting (WRF) model and optimized the relevant parameter inputs. Based on sensitivity experiments, it quantitatively analyzed the impact of LU and AH inputs on regional climate and OTC in Beijing during winter and summer. OTC was assessed using physiologically equivalent temperature (PET) and the universal thermal climate index (UTCI). The results indicate that urban LU significantly enhanced outdoor heat stress in summer, although the humidity-reducing effect of LU mitigated this impact partially. In contrast, LU caused notable temperature decreases and humidity increases in winter, which exacerbated the intensity of cold stress expressed by PET. It decreased by 0.32 °C during the daytime and 1.83 °C at night, despite lower wind speeds having an offsetting effect. The overall influence of AH was relatively subdued, consistently resulting in elevated temperatures and wind speeds, yet reduced humidity, with more pronounced effects observed during nighttime and winter. AH further intensified the heat stress induced by LU in the summer, whereas in winter it had a mitigating effect on the cold outdoor environment, but could not counteract the negative effects of LU at night.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"59 ","pages":"Article 102306"},"PeriodicalIF":6.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143027306","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