Journal of thermal biology最新文献

{"title":"Does body cooling facilitated by bedding compared to control condition improve sleep among adults (18–64 years old)? A systematic review and meta-analysis","authors":"Florane Pasquier ,&nbsp;Maxime Chauvineau ,&nbsp;Greta Castellini ,&nbsp;Silvia Gianola ,&nbsp;Silvia Bargeri ,&nbsp;Jacopo Vitale ,&nbsp;Mathieu Nedelec","doi":"10.1016/j.jtherbio.2024.104030","DOIUrl":"10.1016/j.jtherbio.2024.104030","url":null,"abstract":"<div><h3>Introduction</h3><div>The relationship between blood distribution, body temperature, and sleep/wakefulness states is still unclear. The aim of the present study is to systematically review the potential beneficial effects of bedding strategies (e.g., mattress, mattress topper or pillow) on body cooling and night-time sleep.</div></div><div><h3>Material &amp; methods</h3><div>This systematic review with meta-analysis searched PubMed, ScienceDirect and Web of Science, from inception until March 4, 2024. We included randomized controlled trials aiming to investigate any type of bedding that induced body cooling compared to habitual sleep environment on sleep parameters in healthy adults. Two reviewers independently extracted data, appraised risk of bias by Cochrane tool, and estimated the mean differences between groups with 95% confidence interval. Meta-analyses and proportional meta-analyses were performed depending on the type of variable. The certainty of evidence was assessed using the Grades of Recommendation, Assessment, Development and Evaluation system.</div></div><div><h3>Results</h3><div>From 3454 articles screened, 9 studies met the inclusion criteria. Overall, with the certainty of the evidence ranging from very low to low we found no differences between groups on sleep onset latency, sleep efficiency, sleep proportion spent in each sleep stage (i.e. N1, N2, N3 and REM), wake after sleep onset, and total sleep time. Results could be interpreted with caution due to high heterogeneity in the estimated effects.</div></div><div><h3>Conclusion</h3><div>With uncertainty of evidence, that ranged from very low to low, different bedding strategies had no effects on night-time sleep characteristics; however, the studies included into the qualitative synthesis suggested an effect of different bedding strategies on body cooling (i.e., lower core body temperature, p &lt; 0.05) from an acute perspective. Future studies on various forms of bedding interventions susceptible to favour and maintain sleep through a positive body thermal effect are highly warranted.</div></div><div><h3>Prospero registration</h3><div>CRD42021275369.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104030"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Supercooling tolerance in the Mexican lizard Barisia imbricata (Squamata: Anguidae)","authors":"Natalia Fierro-Estrada ,&nbsp;Donald B. Miles ,&nbsp;Barry Sinervo ,&nbsp;Fausto R. Méndez de la Cruz ,&nbsp;Oswaldo Téllez-Valdes","doi":"10.1016/j.jtherbio.2025.104056","DOIUrl":"10.1016/j.jtherbio.2025.104056","url":null,"abstract":"<div><div>Environmental temperature impacts the physiological processes of reptiles, determines their hours of activity per day, and may constrain their ability to meet critical ecological requirements. When environmental temperatures reach freezing, a few lizard species exhibit two mechanisms (supercooling and freezing tolerance) to survive freezing, and these two processes depend on cryoprotective molecules, such as glucose. Organisms produce high glucose concentrations to reach lower than normal crystallisation points, and this blood glucose concentration can double after freezing. The viviparous lizard <em>Barisia imbricata</em> lives along a wide elevational gradient (2100–4000 m) at tropical latitudes in temperate and subtropical climates. Populations at extremely high elevations experience environmental temperatures at or below 0 °C. We measured blood glucose concentrations in the lizard <em>B. imbricata</em> in different seasons and compared the values between seasons and between two populations occurring at the elevations of 2200 and 3700 m. In addition, we froze lizards from the two populations and measured their blood glucose concentrations before and after freezing. We did not observe any differences in blood glucose concentrations between different seasons or the two populations. In addition, all lizards survived freezing; their mean crystallisation point was −4.13 <strong>°</strong>C. Blood glucose concentration in the lizards increased after exposure to freezing temperatures during autumn and winter. Our results indicate that <em>B. imbricata</em> tolerates experimental freezing even in individuals not naturally exposed to subzero temperatures (i.e. populations at 2200 m). Elevated blood glucose concentrations (present year-round) may help <em>B. imbricata</em> individuals survive at low temperatures.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104056"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of maternal curcumin nano-micelle supplementation on transitioning ewes and their offspring: Performance, health biomarkers, and environmental impacts during heat stress","authors":"Mostafa Bokharaeian ,&nbsp;Barış Kaki ,&nbsp;Mojtaba Najafi ,&nbsp;Abdolhakim Toghdory ,&nbsp;Taghi Ghoorchi","doi":"10.1016/j.jtherbio.2025.104047","DOIUrl":"10.1016/j.jtherbio.2025.104047","url":null,"abstract":"<div><div>This study examined the impact of curcumin nanomicelles (CNM) supplementation on transitioning ewes and their offspring. Thirty-two crossbred pregnant ewes [Ile-de-France × (Dalagh × Romanov)], confirmed to carry twins, were randomly assigned to a control group (CTRL) or a treatment group receiving 40 mg of CNM per ewe per day. Supplementation began before and continued after delivery. We assessed various parameters, including growth performance, metabolic health, inflammatory markers, hematological profiles, immunoglobulin levels, antioxidant status, and greenhouse gas emissions. CNM supplementation improved growth in both ewes and lambs, consistent with curcumin's known metabolic effects. Significant reductions in inflammatory markers were observed in both ewes and lambs, with decreased neutrophil-to-lymphocyte ratios indicating reduced systemic inflammation. Increased levels of IgG and IgA in both ewes and lambs suggested improved immune competence. Antioxidant biomarkers indicated better management of oxidative stress, with some benefits extended to offspring. CNM had varying effects on methanogen populations and nitrous oxide emissions. It significantly reduced methanogen numbers postpartum, but had no significant effect pre-partum. A slight increase in N2O emissions was observed before delivery, but was not sustained after delivery. These results underscore the complex interactions of metabolic, immunological, and environmental factors influenced by CNM supplementation during the transition period. More research is needed to refine supplementation strategies, evaluate long-term effects, and explore ways to mitigate increased greenhouse gas emissions while preserving health benefits.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104047"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of thermal tolerance plasticity across fish species and life stages","authors":"Jeremy De Bonville ,&nbsp;Anna H. Andreassen ,&nbsp;Zara-Louise Cowan ,&nbsp;Lorena Silva-Garay ,&nbsp;Robine H.J. Leeuwis ,&nbsp;Eirik R. Åsheim ,&nbsp;Ben Speers-Roesch ,&nbsp;Graham D. Raby ,&nbsp;Sandra A. Binning ,&nbsp;Fredrik Jutfelt","doi":"10.1016/j.jtherbio.2024.104024","DOIUrl":"10.1016/j.jtherbio.2024.104024","url":null,"abstract":"<div><div>Climate warming with associated heat waves presents a concerning challenge for ectotherms such as fishes. During heatwaves, the ability to rapidly acclimate can be crucial for survival. However, surprisingly little is known about how different species and life stages vary in their acclimation dynamics, including the magnitude of change in thermal tolerance through acclimation (i.e. acclimation capacity; also known as the acclimation response ratio, ARR), the duration needed for the novel acclimation temperature to significantly alter thermal tolerance from the initial level (which we term the response induction time, t_induction), or the duration needed to achieve the new acclimation steady state (which we term the time to full acclimation, t_steady). To shed light on this knowledge gap, we studied the acclimation dynamics of three wild-caught fishes (goldsinny wrasse, three-spined stickleback and European flounder) by assessing upper thermal tolerance (CT_max) after different periods of time acclimating to a warmed environment. We also measured both CT_max and lower thermal tolerance (CT_min) in juvenile and adult lab-bred zebrafish acclimated to a warmed environment. Upper thermal tolerance of zebrafish and sticklebacks significantly increased after a 3 h exposure to a warm treatment, while t_induction took six and 24 h in the wrasse and flounder, respectively. Goldsinny wrasse had the highest ARR, and did not reach full acclimation of CT_max within the duration of the study (10 days). All other species fully acclimated within 4–10 days. Juvenile zebrafish showed similar acclimation dynamics to adults for both upper and lower thermal tolerance, but had a higher CT_min for all acclimation durations. Our results demonstrate that acclimation dynamics of thermal tolerance vary across species, but can be similar between life stages within species. Understanding species-specific thermal plasticity is important for accurately modeling the projected impacts of climate change.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104024"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142895963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surviving the heat: The homeostatic regulation mechanism of endangered Brachymystax tsinlingensis","authors":"Zhenlu Wang ,&nbsp;Huan Ye ,&nbsp;Peng Liu ,&nbsp;Shaoqing Lin ,&nbsp;Yizhou Wang ,&nbsp;Qiong Zhou ,&nbsp;Haibo Jiang ,&nbsp;Jian Shao","doi":"10.1016/j.jtherbio.2024.104023","DOIUrl":"10.1016/j.jtherbio.2024.104023","url":null,"abstract":"<div><div>Conservation and utilization of <em>Brachymystax tsinlingensis</em> Li, 1966 (<em>B. tsinlingensis</em>), an endangered cold-water fish, is severely hampered by heat stress. In this study, heat stress and recovery experiments were firstly performed and implied that the intestine of <em>B. tsinlingensis</em> remained capable of self-regulation under heat stress. Therefore, transcriptome analysis was used to investigate the homeostatic mechanisms of <em>B. tsinlingensis</em> during temperature fluctuations. The results showed that a total of 5775 differentially expressed genes (DEGs) (1725 up- and 4050 down-regulated) were identified in the heat stress group, and 4312 DEGs (2024 up- and 2228 down-regulated) were identified in the recovery group when compared to their expression levels in the control group. Through Gene Set Enrichment Analysis (GSEA), citrate cycle (TCA cycle), oxidative phosphorylation, apoptosis, ferroptosis, focal adhesion, and tight junction pathways were found to be significantly up-regulated during heat stress, and declined during the recovery process. The results illustrated that heat stress caused ferroptosis and apoptosis in <em>B. tsinlingensis</em>. However, the organism was able to maintain homeostasis during temperature fluctuations modulating its energy metabolism, as well as the barrier and immune functions of the intestine. These findings help to enhance our understanding of the acclimation mechanisms of cold-water fish in present-day climate change.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104023"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142828759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single and combined effects of environmental heat stress and physical exercise on thermoregulation, executive function, and cerebral oxygenation","authors":"Fanjun Qin,&nbsp;Ke Hu,&nbsp;Yuge Wu,&nbsp;Xinyan Zheng","doi":"10.1016/j.jtherbio.2025.104057","DOIUrl":"10.1016/j.jtherbio.2025.104057","url":null,"abstract":"<div><div>This study investigated the single and combined effects of environmental heat stress and physical exercise on executive function (EF) performance, prefrontal cortex oxygenation, thermoregulatory responses and subjective perceptions. Sixteen subjects participated in four experimental sessions: two under moderate environmental conditions (23 °C), with and without physical exercise (R23, E23), and two under hot environmental conditions (35 °C), with and without physical exercise (R35, E35). In each session, participants completed EF tasks before and after 1 h of passive rest or 45 min of moderate-intensity cycling followed by 15 min of rest. We used Δresponse time (ΔRT) and Δaccuracy (ΔACC) of EF tasks to demonstrate changes from pre to post experiment. Additionally, changes in cerebral oxygenation during EF tasks were illustrated using the Δoxygenation difference. Heat stress alone increased core temperature (T_core), mean skin temperature (T_skin), heart rate (HR), thermal sensation (TS), and rating of perceived exertion (RPE). Exercise in a hot environment further increased physiological indicators and RPE, but TS exhibited a different pattern, with lower TS in R35 compared to E35 during the second battery of executive function tests. Moreover, heat stress alone increased ΔRT for the More-Odd Shifting task and the Stroop task under incongruent conditions, while decreasing the Δoxygenation difference during the More-Odd Shifting task. ΔRT for the 2-back, More-Odd Shifting and Stroop tasks under incongruent conditions were lower in the E35 trial than in the R35 trial, whereas the Δoxygenation difference was higher in the E35 trial compared to the R35 trial. These findings indicate that environmental heat stress alone increases T_core and T_skin, alters TS, and impairs EF performance by decreasing prefrontal cortex oxygenation. A 45-min moderate-intensity exercise combined with environmental heat stress enhances the increases in body temperatures but mitigates the detrimental effects of heat stress alone on EF performance by increasing prefrontal cortex oxygenation.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104057"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143052957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between temperature and relative humidity with CO2 and CH4 concentration and ectoparasite abundance in blue tit (Cyanistes caeruleus) nests","authors":"Francisco Castaño-Vázquez ,&nbsp;Sergio Sánchez-Moral ,&nbsp;Soledad Cuezva ,&nbsp;Santiago Merino","doi":"10.1016/j.jtherbio.2025.104058","DOIUrl":"10.1016/j.jtherbio.2025.104058","url":null,"abstract":"<div><div>The presence of nestlings influences the microclimate inside avian nesting cavities. We explored the relationship between temperature and relative humidity and the abundance of ectoparasites and gas concentrations in blue tit nest boxes during the nestling period by comparing two years with differing climatic conditions. In the second year, we also manipulated the temperature and humidity inside the nest boxes. The average temperature in nest boxes was colder during 2016 than 2017; in the latter, even warmer conditions were attained due to the experimental manipulation of temperature. Carbon dioxide (CO₂) concentration in the forest air was slightly lower in 2016 than 2017. However, in both years, the CO₂ concentration of nest box air was higher than that of forest air, with 2017 showing a greater difference. Differences in brood size, larger in 2016, did not explain the difference in CO₂ concentration. However, CO₂ concentration was higher in nestboxes in the warmer year implying that at higher temperatures, organic matter decomposition likely accelerates, releasing more CO₂ into the atmosphere. By contrast, CH₄ concentration in nest-box air, which was similar in both years, was lower than that in forest air, particularly in the wettest and coldest year. Different relationships were found between the abundance of different ectoparasites and the temperature, relative humidity, and gas concentration measured at different days of nestling age. For example, a positive association is observed between flea larval abundance and temperature at nestling day 8, but a negative one is observed for mites under the same microclimate conditions. Moreover, a negative relationship was observed between the abundance of mites, midges, and blackflies and CH₄ concentration at different nestling ages. These results suggest that changes in climatic conditions can also affect the concentrations of CH₄ and CO₂ inside and outside nest boxes, which in turn differentially affect ectoparasite abundance.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104058"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143074896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"“Sadness smile” curve: Processing emotional information from social network for evaluating thermal comfort perception","authors":"Yifeng Liu ,&nbsp;Xinyue Zhang ,&nbsp;Hongxu Wei ,&nbsp;Zhanhua Cao ,&nbsp;Peng Guo","doi":"10.1016/j.jtherbio.2024.104025","DOIUrl":"10.1016/j.jtherbio.2024.104025","url":null,"abstract":"<div><div>Thermal comfort is a subjective perception, hence conventional evaluation using meteorological factors faces a technical challenge in precise assessment. Human beings have the nature to differentiate expressions of facial emotions when varied thermal environments are perceived. Facial expression scores can be taken as a predictor of perceived thermal comfort which can be precisely assessed using deep learning against physical factors. In this study, a total of 8314 facial photos were obtained from volunteers in 82 parks of 49 cities via social network. Facial expressions were analyzed to happy, sad, and neutral emotion scores using a professional instrument. Temperature-responsive changes in sadness score (SS) can be fit by a U-shaped curve which was called as the ‘sadness smile’. The stationary point of second-order derivative was identified to predict the-most-comfort temperature (22.84 °C), across which a tangent line framed the range of comfort temperatures based on two intersections with first-order derivatives (14.62–31.06 °C). Critical temperature points were identified along a positively correlated line of modified temperature-humidity index against increasing temperatures, which were negatively correlated with SS in autumn and winter. The ResNet model was demonstrated to excellently predict emotion-based thermal comfort perceptions in validation set (<em>R</em>² &gt; 0.5). A nation-wide mapping suggested that many cities of Northwest and North China had local environments that can be perceived with comfort assessed by SS against thermal and cooling temperatures in summer and winter, respectively.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104025"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142846937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sex-specific differences in insulin response and substrate oxidation after repeated, brief whole-body immersion in 45 °C water: A prospective, interventional study","authors":"Rima Solianik,&nbsp;Gintare Dauksaite,&nbsp;Laura Jarutiene,&nbsp;Marius Brazaitis","doi":"10.1016/j.jtherbio.2024.104029","DOIUrl":"10.1016/j.jtherbio.2024.104029","url":null,"abstract":"<div><div>Prolonged heat exposure is suggested to improve glucose metabolism and fat oxidation, but no studies have addressed whether brief heat stimuli represent a viable, time-efficient, alternative approach. Consequently, we examined the ability of brief stimuli evoked by 45 °C water to improve glucose tolerance, insulin sensitivity, and fat oxidation in young, non-obese, males and females. Twenty-four participants completed fourteen 5-min sessions involving whole body passive heating in 45 °C water. Changes in resting catecholamines, cytokines, substrate oxidation, resting energy expenditure, glucose tolerance, and insulin release in response to an oral glucose tolerance test, were assessed before and 24-h after intervention, and 1 month after the end of the intervention. The results showed that repeated short-duration heat intervention had no significant effects on epinephrine, norepinephrine, interleukin-6, and tumor necrosis factor alpha production in both sexes. Glucose area under the curve (AUC) was not affected. However, females had a lower insulin AUC and improved insulin sensitivity as indicated by a decrease in homeostatic model assessment for insulin resistance, and an increase in the quantitative insulin sensitivity check index and the Matsuda insulin sensitivity index values one month after the end of the heat intervention. No effect was observed in resting energy expenditure, but carbohydrate oxidation per kilogram increased in females, and this substrate oxidation change was maintained after one month. In conclusion, fourteen sessions of brief 5-min whole-body immersion in 45 °C water produced an improvement in insulin sensitivity and increased reliance on carbohydrate oxidation in females.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104029"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142846938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comfort-based design of summer green space optimization in arid oasis-type cities","authors":"Hongkai Xie,&nbsp;Xiaoxu Li,&nbsp;Jie Li","doi":"10.1016/j.jtherbio.2024.104020","DOIUrl":"10.1016/j.jtherbio.2024.104020","url":null,"abstract":"<div><div>Arid, oasis-type cities significantly limit the quality and duration of outdoor activities for residents due to their hot, dry summer climate. This study aims to enhance environmental comfort in dry, hot regions, focusing on the outdoor environment of a densely populated university in Xinjiang. Through on-site research and field measurements, the thermal baseline and key factors influencing comfort across different times and locations were analyzed. Numerical simulations were employed to explore the mechanisms by which changes in vegetation parameters affect comfort, leading to the proposal of an optimization strategy. The results indicate that a combination of empirical measurements and survey data reveals variations in thermal baselines and comfort-affecting factors over time and space. The neutral temperature ranged from 26.10 °C to 26.96 °C. Key factors affecting summer comfort included G (0.91∗∗), T_a (0.74∗∗), and RH (−0.57∗∗). The impact of vegetation coverage on PET was found to depend on the type of vegetation assembly. In comparison to the baseline case at 18:00, the optimized plaza design resulted in a decrease in T_a, etc by 2.86 °C, an increase in RH by 3.42%, a reduction in V_a by 0.01 m/s, and a reduction in PET by 24.62 °C. These enhancements also improved comfort levels on nearby roads. The findings provide valuable insights for assessing human comfort and designing green spaces in arid regions.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"127 ","pages":"Article 104020"},"PeriodicalIF":2.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}