Urban Climate最新文献_第5页

Seasonal and interannual variability in urban neighborhood evapotranspiration and its controlling factors in a subtropical city 亚热带城市邻里蒸散的季节和年际变化及其控制因素

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-18 DOI: 10.1016/j.uclim.2025.102613

Chunhua Yan , Weiting Hu , Zhe Shi , Zhi Chen , Guo Yu Qiu

{"title":"Seasonal and interannual variability in urban neighborhood evapotranspiration and its controlling factors in a subtropical city","authors":"Chunhua Yan , Weiting Hu , Zhe Shi , Zhi Chen , Guo Yu Qiu","doi":"10.1016/j.uclim.2025.102613","DOIUrl":"10.1016/j.uclim.2025.102613","url":null,"abstract":"<div><div>Urban evapotranspiration (ET) plays an important role in mitigating the adverse effects of urbanization and global warming. Precisely measuring urban ET is essential for understanding the mechanisms underlying these mitigation benefits. However, due to the lack of long-term continuous observations, there is limited knowledge regarding the seasonal and interannual variability in urban neighborhood ET and its driving forces, especially for tropical and subtropical cities. In this study, we investigated the dynamics of urban ET using eddy covariance and its influencing factors based on five years of data collected from 2017 to 2021 in Shenzhen, a subtropical megacity in China. Our results highlight the importance of urban neighborhood ET as a significant water consumption in urban areas. Over the five-year period, the mean daily ET value was 1.82 mm day<sup>−1</sup>, with the lowest value in January and December (< 1 mm day<sup>−1</sup>) and the highest value between May and August (> 5 mm day<sup>−1</sup>). The annual ET ranged from 635 mm to 705 mm and averaged 664 mm, accounting for approximately 38 % of the total precipitation. The primary driving force behind urban neighborhood ET was the available energy, while water availability acted as a constraint in such urban environments with substantial annual precipitation (1761 mm). Furthermore, the variability in ET was observed to be influenced by vegetation coverage. These findings have significant implications for urban heat island mitigation and stormwater management.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"64 ","pages":"Article 102613"},"PeriodicalIF":6.9,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093788","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

Estimating the impacts of increasing temperatures and the efficacy of climate adaptation strategies in urban microclimates with deep learning 基于深度学习的温度升高对城市小气候的影响及气候适应策略的有效性评估

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-16 DOI: 10.1016/j.uclim.2025.102603

Grant Buster , Jordan Cox , Brandon N. Benton , Ryan N. King

{"title":"Estimating the impacts of increasing temperatures and the efficacy of climate adaptation strategies in urban microclimates with deep learning","authors":"Grant Buster , Jordan Cox , Brandon N. Benton , Ryan N. King","doi":"10.1016/j.uclim.2025.102603","DOIUrl":"10.1016/j.uclim.2025.102603","url":null,"abstract":"<div><div>As urbanization and climate change progress, understanding and addressing urban heat becomes a priority for climate adaptation efforts. High temperatures concentrated in the urban core can drive increased risk of heat-related death and illness as well as increased energy demand for cooling. However, modeling the urban microclimate is an ongoing field of research typically burdened by an imprecise description of the built environment, incomplete observational records, significant computational cost, and a lack of high-resolution estimates of the impacts of increasing temperatures. Here, we present computationally efficient machine learning methods that can improve the accuracy of urban temperature estimates when compared to historical reanalysis data. These models are applied to a neighborhood in Los Angeles, and we compare the energy benefits of heat mitigation strategies to the impacts of climate change. We find that cooling demand is likely to increase substantially through midcentury, but engineered high-albedo surfaces could lessen this increase by more than 50 %. The corresponding increase in winter gas heating offsets the summer cooling benefit in the current climate, but total annual energy use from combined heating and cooling with electric heat pumps benefits from the engineered heat mitigation strategies under both current and future climates.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"64 ","pages":"Article 102603"},"PeriodicalIF":6.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093812","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

Differences in microclimate of paved and green areas 铺砌区与绿地小气候的差异

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-13 DOI: 10.1016/j.uclim.2025.102595

Caroline Hoffmann , Achim Geissler , Andreas Wicki

{"title":"Differences in microclimate of paved and green areas","authors":"Caroline Hoffmann , Achim Geissler , Andreas Wicki","doi":"10.1016/j.uclim.2025.102595","DOIUrl":"10.1016/j.uclim.2025.102595","url":null,"abstract":"<div><div>Rising temperatures in the urban environment due to climate change are leading to an increased interest in building materials and green infrastructure and their impact on the urban microclimate. When considering green infrastructure often the soil moisture is neglected. This publication explores this issue by measuring the microclimate over a sealed surface and a lawn under different moisture conditions. The measurements are compared with simulations using the ENVI-met software.</div><div>The results of the measurements show that during dry periods the temperature difference between the lawn and the paving becomes smaller and can even lead to higher temperatures over the lawn. During humid periods the temperature difference becomes greater, with higher temperatures over the paving. In terms of PET, the differences between the two surfaces are between 0.6 and 1.7 K.</div><div>The comparison between measurements and simulations were used to explore the reliability of the two available radiation models in the software in comparison to the measurement results. Concerning DBT<em>,</em> the deviations are very small. Deviations on a larger scale are found for MRT using both radiation models. Both findings are in line with the literature. The comparison of both radiation models shows that for the paving the “solar radiation model” performs better. Regarding the lawn both models perform almost equally.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"64 ","pages":"Article 102595"},"PeriodicalIF":6.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050402","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 urbanization and industrialization on PM10 in municipalities near megacities: A case study from an Andean Region, Latin America 城市化和工业化对大城市附近城市PM10的影响：来自拉丁美洲安第斯地区的案例研究

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-13 DOI: 10.1016/j.uclim.2025.102612

Omar Ramírez , Carlos Gutiérrez-Ulloa , Luis Zarate , Ana Maria Carrión , Adriana Hernandez Guzman , Jesús de la Rosa

{"title":"Impact of urbanization and industrialization on PM10 in municipalities near megacities: A case study from an Andean Region, Latin America","authors":"Omar Ramírez , Carlos Gutiérrez-Ulloa , Luis Zarate , Ana Maria Carrión , Adriana Hernandez Guzman , Jesús de la Rosa","doi":"10.1016/j.uclim.2025.102612","DOIUrl":"10.1016/j.uclim.2025.102612","url":null,"abstract":"<div><div>This study provides a chemical characterization, source apportionment, and health risk assessment of PM<sub>10</sub> collected at an urbanizing site near Bogotá, a major Latin American megacity. The average concentration was 23 ± 6.6 μg/m<sup>3</sup>, below national and WHO 24-h exposure standards, likely due to socioeconomic measures during the COVID-19 pandemic. Chemical analysis showed that carbonaceous matter (46 %) and crustal minerals (36 %) were predominant, with secondary inorganic compounds contributing 15 % and trace elements 2 %. The highest metal concentrations were Zn, Cu, Sn, Ba, and Pb. Using Positive Matrix Factorization (PMF) and AERMOD models, major sources of PM<sub>10</sub> were identified. AERMOD pointed to industrial contributors, including fire-tube boilers and a thermal power plant, while PMF identified seven sources: crude and oil combustion (26 %), secondary aerosols and biomass burning (26 %), asphalt and cement plants (16 %), traffic emissions (13 %), road dust (8 %), mineral and industrial emissions (8 %), and salt and fertilizer industries (3 %). A cancer risk assessment revealed that Cr(VI), As, and Co exceeded safety thresholds, posing a low risk (10<sup>−6</sup> to <10<sup>−4</sup>). These findings highlight the significant impact of industrialization and urbanization on air quality near megacities, even during reduced emissions periods, stressing the need for further research in peri-urban areas of emerging economies.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"64 ","pages":"Article 102612"},"PeriodicalIF":6.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050401","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

Estimating the time evolution of urban pollutant concentrations using offline CFD 基于离线CFD估算城市污染物浓度的时间演化

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-01 DOI: 10.1016/j.uclim.2025.102586

Yaxin Ding , Jason Y.L. Chu , Eric K.W. Ng , Jackie W.Y. Ng , Keith Ngan

{"title":"Estimating the time evolution of urban pollutant concentrations using offline CFD","authors":"Yaxin Ding , Jason Y.L. Chu , Eric K.W. Ng , Jackie W.Y. Ng , Keith Ngan","doi":"10.1016/j.uclim.2025.102586","DOIUrl":"10.1016/j.uclim.2025.102586","url":null,"abstract":"<div><div><span><math><msub><mrow><mi>NO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>, <span><math><msub><mrow><mi>NO</mi></mrow><mrow><mi>x</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>PM</mi></mrow><mrow><mn>2</mn><mo>.</mo><mn>5</mn></mrow></msub></math></span> concentrations within two densely built-up areas are predicted using offline steady-state CFD simulations by adapting the WA CFD-RANS methodology introduced by Parra et al. 2010. Statistical metrics for the pollutants indicate good agreement with a two-week measurement campaign and air quality monitoring data for 2021. The performance is assessed with respect to the assumptions required for pollutant concentrations to be estimated from RANS simulations for different inflow wind directions. It is shown that these assumptions are satisfied by many different configurations over a wide range of meteorological conditions since background concentrations play an important role, the turbulence time scale is short, the impact of wind-direction fluctuations is limited, and the flow is fully developed. Extensive sensitivity testing confirms that good agreement is still obtained for a small set of offline simulations, averaging intervals much shorter or longer than one hour, different definitions of inflow and in situ velocity scales, and substitution of LES for RANS. This work elucidates the conditions under which urban pollutant concentrations can be estimated from offline RANS and demonstrates that the methodology’s applicability may extend beyond typical air quality applications.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"63 ","pages":"Article 102586"},"PeriodicalIF":6.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920266","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

Introducing evaporating water channels in urban canyons: Assessment of ventilation and thermal effects through Large-Eddy Simulation 引入城市峡谷中的蒸发水道：通过大涡模拟评估通风和热效应

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-01 DOI: 10.1016/j.uclim.2025.102581

Bidesh Sengupta, Marco Pancaldi, Silvana Di Sabatino, Carlo Cintolesi

{"title":"Introducing evaporating water channels in urban canyons: Assessment of ventilation and thermal effects through Large-Eddy Simulation","authors":"Bidesh Sengupta, Marco Pancaldi, Silvana Di Sabatino, Carlo Cintolesi","doi":"10.1016/j.uclim.2025.102581","DOIUrl":"10.1016/j.uclim.2025.102581","url":null,"abstract":"<div><div>Cities are particularly vulnerable to extreme weather events such as heat waves or high summer temperatures, which greatly impact public health and well-being. Climate change is expected to intensify these events and blue Nature-Based Solutions (NBS), such as water channels, have the potential to effectively mitigate temperatures and regulate the urban microclimate, but their impact on urban canyon ventilation and thermal comfort is not well understood yet. This study employs Large-Eddy Simulations (LES) with a water evaporation and heat exchange model to investigate how water channels influence airflow dynamics and temperature in a simplified urban canyon. Two configurations with a warm and cold water channel in a mixing convection regime for a Richardson number of <span><math><mrow><mi>R</mi><mi>i</mi><mo>=</mo><mn>3</mn><mo>.</mo><mn>4</mn></mrow></math></span>, have been studied and compared to the neutral case without channel. Results show that the introduction of a water channel increases the average in-canyon turbulent kinetic energy, where addthe warm channel case showed a 61% increase compared to the cold channel case. Warm channels increase vertical mixing and buoyancy-driven turbulence, enhancing mass and momentum exchange with the atmosphere without a substantial increase in-canyon temperature. In both cases, the estimation of human comfort indices shows that the presence of water channels does not deteriorate the thermal comfort within the canyon. These findings suggest that water channels can effectively mitigate high temperatures in urban canyons, lowering the average temperature in the canyon by 1.6% (0.3%) in cold (warm) case compared to neutral ones. This study provides further evidence of the potential of blue NBS to enhance urban climate resilience.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"63 ","pages":"Article 102581"},"PeriodicalIF":6.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027001","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

Constraining anthropogenic CO2 emissions using dense observations from OCO-3: Disentangling observed imprints over Xiamen-Zhangzhou-Quanzhou metropolitan area and challenges 利用OCO-3密集观测抑制人为CO2排放：厦门-漳州-泉州都市圈观测印记的解开及其挑战

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-01 DOI: 10.1016/j.uclim.2025.102591

Xinxin Ye , Weijiao Li , Thomas Lauvaux , Shuifa Lin , Ziwei Zhang , Yunxiao Lin , Jingfen Hua , Qin You , Jianyi Lin

{"title":"Constraining anthropogenic CO2 emissions using dense observations from OCO-3: Disentangling observed imprints over Xiamen-Zhangzhou-Quanzhou metropolitan area and challenges","authors":"Xinxin Ye , Weijiao Li , Thomas Lauvaux , Shuifa Lin , Ziwei Zhang , Yunxiao Lin , Jingfen Hua , Qin You , Jianyi Lin","doi":"10.1016/j.uclim.2025.102591","DOIUrl":"10.1016/j.uclim.2025.102591","url":null,"abstract":"<div><div>Quantification and monitoring of urban fossil fuel CO<sub>2</sub> (FFCO<sub>2</sub>) emissions with sufficient accuracy and spatial granularity are critical to emission control and climate change mitigation. We use a top-down Bayesian inversion method to constrain FFCO<sub>2</sub> emissions from the Xiamen-Zhangzhou-Quanzhou metropolitan area, China, based on high-resolution areal snapshots of total column CO<sub>2</sub> (XCO<sub>2</sub>) from OCO-3 snapshot area maps (SAMs) from September 2019 to July 2023. Based on five available overpasses, the observed XCO<sub>2</sub> enhancements range from 0.70 ± 0.53 ppm to 2.29 ± 1.16 ppm. Inversions are conducted to disentangle mixed imprints and jointly constrain emissions from area sources in Xiamen, local power plants in Xiamen, and other adjacent urban sources. An overall improvement in the fossil fuel XCO<sub>2</sub> enhancement is shown with the RMSE reduced by 24 % and the correlation coefficient improved by 65 %. While, sectoral and overpass scale variations of performance are revealed, with the observational representativity, amount of XCO<sub>2</sub> samples, and spatial displacements between modeled and observed XCO<sub>2</sub> plumes being primary limitation factors. Based on inversion results with sufficient robustness (on 26 December 2019 and 12 august 2022), the mean constrained emission of Xiamen is 1.68 × 10<sup>4</sup> tCd<sup>−1</sup>, close to bottom-up emission accounting based on local statistics and facility-level fuel consumptions, with the relative differences <18 %. Given that only two OCO-3 SAMs overpasses produce robust inversions over nearly four years, the results demonstrate more challenges than potential of using XCO<sub>2</sub> mapping observations to constrain sources with spatial granularity. Possible pathways for further improvements are discussed.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"63 ","pages":"Article 102591"},"PeriodicalIF":6.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988195","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

Long-term trends in extreme heat exposure equity for children and elderly: A case study of Shandong Peninsula urban agglomeration 儿童和老年人极端热暴露公平性的长期趋势——以山东半岛城市群为例

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-01 DOI: 10.1016/j.uclim.2025.102587

Boyu Li , Zhaoming Wang , Xu Wang , Lei Yao

{"title":"Long-term trends in extreme heat exposure equity for children and elderly: A case study of Shandong Peninsula urban agglomeration","authors":"Boyu Li , Zhaoming Wang , Xu Wang , Lei Yao","doi":"10.1016/j.uclim.2025.102587","DOIUrl":"10.1016/j.uclim.2025.102587","url":null,"abstract":"<div><div>China's warming exceeds global rates, with Shandong Peninsula urban agglomeration (SPUA) showing increasing heat stress on vulnerable groups (children (VG<sub>c</sub>) and elderly (VG<sub>e</sub>)). Extreme heat exposure drives urban-rural equity disparities. This study explores such issues for VG<sub>c</sub> and VG<sub>e</sub> in SPUA. We found that: (1) Extreme heat risk (EHR) in urban areas (UA) (0.23) is significantly higher than in rural areas (RA) (0.21) for most of the time. UA (0.013) show a relatively faster growth rate compared to RA (0.010). (2) The exposure of VG<sub>c</sub> and VG<sub>e</sub> in RA far exceeds that in UA. In UA, the exposure for the majority of them hovers around 1.2×10<sup>4</sup><sup>∼</sup>6.85×10<sup>5</sup> persons, whereas in RA, the exposure of VG<sub>c</sub> and VG<sub>e</sub> falls within 1.42×10<sup>4</sup>∼1.54×10<sup>6</sup> persons in most cases. The exposed population mostly increases at a rate of 4×10<sup>2</sup><sup>∼</sup>4.5×10<sup>4</sup> persons/year. (3) VG<sub>c</sub> and VG<sub>e</sub> show similar spatiotemporal characteristics in exposure equity. In UA, there is severe exposure inequity: 50% of regions face relatively high EHR and exposed populations, and this phenomenon is growing more unequal. In contrast, exposure in RA is relatively equitable: 50% of regions face relatively low EHR and exposed populations, and it tends towards a more equitable state.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"63 ","pages":"Article 102587"},"PeriodicalIF":6.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925132","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

Modeling and optimization of heat island networks based on machine learning and the perspective of spatial heterogeneity in metropolitan areas 基于机器学习和空间异质性视角的大都市热岛网络建模与优化

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-01 DOI: 10.1016/j.uclim.2025.102592

Shaofeng Chen, Yuwei Qiu, Yuhan Xu, Jiafang Huang, Zheng Ding

{"title":"Modeling and optimization of heat island networks based on machine learning and the perspective of spatial heterogeneity in metropolitan areas","authors":"Shaofeng Chen, Yuwei Qiu, Yuhan Xu, Jiafang Huang, Zheng Ding","doi":"10.1016/j.uclim.2025.102592","DOIUrl":"10.1016/j.uclim.2025.102592","url":null,"abstract":"<div><div>Global climate change has intensified the regional linkage of the urban heat island effect (UHI), posing major challenges to urban sustainability. This study examines three major metropolitan areas in China to understand how thermal environments interact under different geographical conditions. It aims to improve the heat island network structure and enhance governance strategies. The study combines XGBoost machine learning with the GeoSHapley method to build a high-precision thermal resistance surface, overcoming the bias of traditional methods and capturing nonlinear effects, spatial variation, and factor interactions. The heat island network is modeled using circuit theory and evaluated and verified using structural indicators such as α closure, β line-to-point ratio and γ connectivity. Key findings include: 1) Resistance factors vary significantly across regions. In Chongqing, topographic factors (DEM and SLOPE) account for 72 % of the resistance, dominating the network. In Xiamen-Zhangzhou-Quanzhou and Wuhan, NDBI contributes 0.37 and 0.38, respectively, as the main driver. 2)GeoSHapley analysis identified cooling thresholds for resistance factors. For example, NDVI thresholds are [0.75–0.85] in Xiamen-Zhangzhou-Quanzhou and [0.65–0.70] in Wuhan, offering a scientific basis for resistance classification. 3)The Chongqing network shows the highest connectivity (γ = 0.81) and integrity (α = 0.70), with a model fit of R<sup>2</sup> = 0.907. Xiamen-Zhangzhou-Quanzhou also performs well, proving the method works in complex terrain. This study improves upon past methods by introducing dynamic resistance classification and interaction analysis. It offers a scalable framework for managing urban thermal environments based on local geography, supporting ecological and sustainable urban development.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"63 ","pages":"Article 102592"},"PeriodicalIF":6.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932690","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 complex effect of vegetation on thermal stress - real or imaginary? Measuring the psychological effect of vegetation 植被对热应力的复杂影响——真实的还是虚构的？测量植物的心理效应

IF 6.9 2区工程技术

Urban Climate Pub Date : 2025-09-01 DOI: 10.1016/j.uclim.2025.102598

Tali Motzkin, Tal Svoray, Evyatar Erell

{"title":"The complex effect of vegetation on thermal stress - real or imaginary? Measuring the psychological effect of vegetation","authors":"Tali Motzkin, Tal Svoray, Evyatar Erell","doi":"10.1016/j.uclim.2025.102598","DOIUrl":"10.1016/j.uclim.2025.102598","url":null,"abstract":"<div><div>Studies show beneficial effects of vegetation for humans, such as improvement of air quality, heat moderation and stress reduction. It is also assumed, so far with no robust evidence, that vegetation has a measurable psychological effect that enhances thermal comfort and reduces thermal stress, and that this effect is manifest in addition to its well-established physiological effect. Individuals in a warm environment feel cooler in the presence of extensive vegetation than in a similar setting with an identical Physiological Equivalent Temperature (PET) but less vegetation. We provide, for the first time, empirical evidence that quantifies the psychological effect of the Vegetation View Index (VVI) on thermal comfort and thermal stress. An outdoor study with 322 participants showed that when average PET exceeds ∼32 °C, the presence of vegetation in a person's field of view (FOV) has a positive effect on thermal sensation, thermal comfort and thermal preference. Thermal comfort and preference votes improved as VVI increased, and thermal sensation votes were progressively lower, as VVI values increased up to a median of ∼9 %. These subjective responses were accompanied by a measurable and significant difference in participants' physiological stress levels, as assessed by skin conductance level, for a Physiological Equivalent Temperature of more than ∼31 °C. The beneficial effect of vegetation increased with an increase in the Vegetation View Index, particularly from a median coverage of ∼11 %, but the effect was nonlinear. These results demonstrate psychological and physiological contributions of vegetation to thermal stress reduction, as recorded simultaneously under similar hot meteorological conditions.</div></div>","PeriodicalId":48626,"journal":{"name":"Urban Climate","volume":"63 ","pages":"Article 102598"},"PeriodicalIF":6.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019744","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