Atmospheric Environment最新文献

{"title":"Exploring the presence of microplastics in lung lavage of respiratory patients and correlation with airborne microplastics","authors":"Faezeh Jahedi ,&nbsp;Afshin Takdastan ,&nbsp;Mehdi Ahmadi ,&nbsp;Maryam Haddadzadeh Shoushtari ,&nbsp;Reza Dehbandi ,&nbsp;Neamatollah Jaafarzadeh Haghighi Fard ,&nbsp;Andrew Turner","doi":"10.1016/j.atmosenv.2025.121560","DOIUrl":"10.1016/j.atmosenv.2025.121560","url":null,"abstract":"<div><div>Microplastics (MPs) are becoming well-known as widespread airborne pollutants with potential consequences for human respiratory health. In this study, we examined the occurrence, morphology, and polymer type of MPs in bronchoalveolar lavage fluid (BALF) samples from 30 patients with respiratory issues in a health care setting in southwestern Iran, in relation to airborne MPs collected contemporaneously from the ambient environment. Individual MPs were separated by the use of chemical digestion and density gradient centrifugation; these were analyzed by Raman spectroscopy and scanning electron microscopy (SEM). Overall, 129 MPs were identified in BALF, with a corrected mean of 3.2 particles/10 mL in BALF; however, the majority were white or transparent fibers ranging from a diameter of 20–100 μm, and were predominantly polyethylene (PE), polypropylene (PP), and polystyrene (PS). Air samples, collected using a high-volume OMNI sampler, ranged from 2.2 to 6.7 MP/m³, while in ambient air variation included shapes and colors with fragments, films, and spherules. Additionally, a statistically significant and strong positive correlation (ρ = 0.996 (p &lt; 0.001)) was found between the weekly ambient MP concentration and the BALF MP counts, supporting inhalation as a likely route of exposure. Both morphologically and polymerically, the airborne MPs will likely pass through and deposit in the lower respiratory tract. These findings highlight the necessity of continued biomonitoring and regulatory concern regarding airborne MPs, particularly in urban and clinical environments.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121560"},"PeriodicalIF":3.7,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Substantial reduction in vehicular PAH emissions and emerging roles of tire wear: Tunnel-test in Guangzhou (2014–2019)","authors":"Shaoxuan Xiao ,&nbsp;Runqi Zhang ,&nbsp;Xiaoyang Wang ,&nbsp;Zhou Zhang ,&nbsp;Wei Song ,&nbsp;Yuanyuan Qin ,&nbsp;Chenglei Pei ,&nbsp;Duohong Chen ,&nbsp;Yanli Zhang ,&nbsp;Xinming Wang","doi":"10.1016/j.atmosenv.2025.121558","DOIUrl":"10.1016/j.atmosenv.2025.121558","url":null,"abstract":"<div><div>Emissions of polycyclic aromatic hydrocarbons (PAHs) from on-road vehicle fleets were investigated through tunnel tests conducted in 2014 and 2019 in Guangzhou, China, to assess the impacts of upgraded vehicle emission standards and changing fleet composition. The emission factors of PM_2.5-bound PAHs (four-ring and above) significantly decreased by 76.4 %, from 45.22 to 10.66 μg km⁻¹ veh⁻¹ during this period. Although the diesel fleet share fell by ∼75 % from 13.0 % to 3.3 %, diesel vehicles remained the dominant source of PAHs, exhibiting emission factors 9–50 times higher than gasoline vehicles. Notably, emissions of some 5- and 6-ring PAHs declined much less and even increased, suggesting that non-exhaust emissions, particularly tire wear, have become increasingly significant sources of PAHs. The overall toxicity, expressed in terms of toxic equivalency quotients (TEQ_BaP), declined by 66.7 %, yet benzo[a]pyrene consistently dominated total toxicity (69–74 %). Persistent nocturnal emission risks associated with diesel-dominated freight traffic highlight the need for targeted emission control policies. These results reveal the effectiveness of stringent regulatory measures in reducing vehicle exhaust emissions and stress the emerging importance of mitigating non-exhaust emission sources in urban pollution control strategies.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121558"},"PeriodicalIF":3.7,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of indoor air quality and exposure analysis of single cell houses of the Himalayan region of Nepal","authors":"Indira Parajuli","doi":"10.1016/j.atmosenv.2025.121554","DOIUrl":"10.1016/j.atmosenv.2025.121554","url":null,"abstract":"<div><div>In the Himalayan region of Nepal, the majority of households are single-cell houses (SCH) where families cook, heat, sleep, and perform daily activities in a single shared space. Firewood and other biomass fuels are commonly used for cooking and heating, especially during cold seasons. This combustion process releases harmful pollutants, such as carbon monoxide (CO), carbon dioxide (CO₂), and fine particulate matter (PM₂.₅), significantly degrading indoor air quality (IAQ) and posing serious health risks to residents. This study aims to assess indoor air quality and evaluate pollutant exposure and associated health risks among occupants of SCHs.</div><div>Continuous real-time monitoring of IAQ parameters was conducted for 24 h over five consecutive days in each house under varying ventilation conditions. CO and PM₂.₅ concentrations were found to be 25.11 ± 14.24 ppm and 793.8 ± 117.36 μg/m³, respectively—exceeding international health guidelines by up to 3.6 times for CO and 32 times for PM₂.₅. Residents are exposed to elevated pollutant concentrations for up to 14 h daily due to extended fire use for both cooking and heating. Inhalation exposure modeling revealed average daily pollutant intakes of 248.59 mg of CO and 6849.74 μg of PM₂.₅ per person. The Air Quality Index (AQI) across monitoring scenarios ranged from 150 to 430, indicating unhealthy to hazardous levels.</div><div>These findings highlight the urgent need for improved ventilation systems and cleaner cooking technologies to mitigate indoor air pollution and reduce health risks in firewood-dependent households in cold regions.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121554"},"PeriodicalIF":3.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atmospheric physicochemical multi-parameter horizonal and vertical mitigation response of two recent Sheveluch volcano eruptions in kamchatka","authors":"Qinqin Liu ,&nbsp;Lu Gui ,&nbsp;Xiangjun Ma ,&nbsp;Jinlei Li ,&nbsp;Jian Xu ,&nbsp;Minghui Tao ,&nbsp;Hui Jing ,&nbsp;Wenxiu Liu ,&nbsp;Qijun Jiao ,&nbsp;Jiajun Li ,&nbsp;Yuxiang Tian ,&nbsp;Zhongting Wang ,&nbsp;Xuhui Shen","doi":"10.1016/j.atmosenv.2025.121556","DOIUrl":"10.1016/j.atmosenv.2025.121556","url":null,"abstract":"<div><div>Based on the two Sheveluch eruption events on April 10, 2023 and August 17, 2024, the comprehensive phenomenon of the two volcanic eruption events is described from the analysis of the seismic activity sequence of the lithosphere to the distribution of atmospheric materials and heat. The seismic distribution in Sheveluch volcanic area is mainly shallow-source (0–70 km) and small-earthquake (ML 3.5–4.0). The April 2023 volcanic eruption released 3692.8 kt SO₂ (vs. 26.21 kt in August 2024), with broader dispersion (100°W) and extended atmospheric retention, reflecting fundamental differences in eruption dynamics and atmospheric transport patterns. Based on the time series analysis, SO₂ and UV aerosol index exhibit significant responses to the volcano eruption events. Vertical trajectory modeling and aerosol layer height (ALH) results indicate eruption column heights of 10 km and 8–9 km for the April 10, 2023 and August 17, 2024 volcanic events, respectively. Notably, positive temperature anomalies observed in the lower stratosphere show potential correlations with volcanic eruption. Comparing the ozone profile with the temperature profile, the ozone depletion may result in a decrease in stratospheric temperature. Volcanic eruption heights at the tropopause level may have an amplifying impact effect on the lower stratosphere. The description of the horizontal and vertical migration processes of atmospheric materials during volcanic eruption is of great significance for the study of multi-layer coupling mechanism.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121556"},"PeriodicalIF":3.7,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining the association between air pollution exposure (PM10, PM2.5 and NO2) across the lifecourse on behavioural and mental health outcomes in adulthood in the Christchurch Health and Development study: a prospective birth cohort study","authors":"M. Hobbs ,&nbsp;B. Deng ,&nbsp;L.J. Woodward ,&nbsp;L. Marek ,&nbsp;P. Eggleton ,&nbsp;J.M. Boden","doi":"10.1016/j.atmosenv.2025.121553","DOIUrl":"10.1016/j.atmosenv.2025.121553","url":null,"abstract":"<div><div>The adverse effects of air pollution on human physical health are well established, but potential links with behavioural and mental health problems are also suggested. However, evidence is limited, with few studies employing spatial life course methods or considering the effects of unmeasured and residual confounding factors. This study addresses the identified gap by using prospective longitudinal data from the Christchurch Health and Development Study to examine associations between cumulative air pollution exposure and subsequent behaviour and mental health outcomes in adulthood. The study sample consists of a birth cohort of 1265 individuals born during 1977 in Christchurch, New Zealand. Individual-level residential address data were linked to air pollution estimates, including annual black smoke levels (micrograms per cubic meter of air or μg/m³) from during pregnancy to age 10 years (1976–1987), and PM₁₀ (21–40 years), PM_2.5 (30–40 years), and NO₂ (40 years) in adulthood. Behavioural (i.e. nicotine, alcohol, cannabis, and other illicit substance use disorders) and mental health outcomes (i.e. depressive symptoms, anxiety disorders, and suicidal ideation) were prospectively assessed from age 21–40 years. Findings from unadjusted population-averaged GEE logistic regression models indicated only weak associations between cumulative air pollution exposure and some behavioural and mental health outcomes. In fully adjusted models, associations were fully attenuated, other than PM_2.5 exposure and nicotine abuse/dependence (OR = 1.074 [1.0156, 1.136]). While further research is needed to confirm our findings, air pollution exposure may be less important than more proximal factors for behaviour and mental health outcomes in adulthood.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121553"},"PeriodicalIF":3.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment and modeling of PAH levels in ambient air and vegetation: A comparative analysis of current models and proposal of a new model","authors":"Abdul Alim Noori,&nbsp;Yücel Taşdemir","doi":"10.1016/j.atmosenv.2025.121557","DOIUrl":"10.1016/j.atmosenv.2025.121557","url":null,"abstract":"<div><div>Polycyclic aromatic hydrocarbons (PAHs) are among the important pollutant groups because of their tremendous emissions and distribution in different environmental media. This study presented comprehensive PAH concentrations from olive leaves and ambient air samples collected over one year. The average concentrations of Σ₁₂PAH in olive leaves and ambient air were 565 ± 402 ng/g DW and 22.4 ± 3.4 ng/m³, respectively. During warmer months, both leaf and ambient air samples exhibited reduced PAH concentrations. The leaf exchange is essential for understanding the accumulation of organic pollutants in trees. Some models estimate the exchange of pollutants between the air and leaves to understand their transport paths. In this study, eleven different models with various parameters were incorporated into the data. Although the octanol/air partition coefficient (K_OA) was found to be the most influential parameter in the employed models, the physical and chemical parameters of the plant, including moisture, air, and lipid content, were effective in the partition. The leaf/air partition coefficient (K_LA) was used to determine the direction of PAH movement. Calculated logK_LA values in the models ranged from 5.5 to 14. PAH compounds with log K_OA values less than 10 showed a similar trend and were close to each other for all models evaluated in this study. However, PAHs with logK_OA&gt;10 yielded scattered results for the applied models. A best-fit model was suggested by using the data obtained in this study. The suggested model agreed well with the measured data and other models.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121557"},"PeriodicalIF":3.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Breathing like a smoker: Estimating relative risk of PM2.5, BC, and NO2 exposure in semi-urban India for better public perception","authors":"Shikha,&nbsp;Ajay Taneja","doi":"10.1016/j.atmosenv.2025.121547","DOIUrl":"10.1016/j.atmosenv.2025.121547","url":null,"abstract":"<div><div>Despite being a leading cause of health issues, air pollution in smaller cities is often overlooked. To address this gap, annual monitoring of Fine Particulate Matter (PM_2.5), Black Carbon (BC), and Nitrogen Dioxide (NO₂) was conducted at a residential site in a semi-urban area and, for comparison, in an urban area. The sampling site was affected by multiple, co-located sources, including the National Highway (NH-19), traffic intersections, street vendor stalls, and other commercial areas, resulting in high exposure levels. The collected data were analyzed to understand the dynamics, variations, morphology, and chemical composition of particles; these levels were then assessed concerning passive cigarette smoke (PSC) exposure, evaluating potential health impacts. Four health outcomes—cardiovascular mortality (CM), lung cancer (LC), low birth weight (LBW), and decreased lung function (DLF) in school-aged children—were assessed to quantify the burden. The results indicate that even minimal concentrations can significantly affect human health, as a rise of 10 μg/m³ in PM_2.5 and NO₂, along with 1 μg/m³ in BC, is associated with mean increases and standard errors of 8.1 (3.98), 8.5 (4.48), and 3.03 (1.22) PSC per day across the four health outcomes, respectively. Seasonally, the post-monsoon period showed predominance due to extensive use of biomass and fossil fuels for heating and cooking in semi-urban regions, leading to an elevated prevalence of decreased lung function (DLF), with 18 passive cigarettes identified as the most significant risk factor among the various outcomes. This study emphasizes the need for population-based monitoring to issue public health advisories that protect vulnerable groups, especially in smaller cities such as Tundla, located in Northern India.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121547"},"PeriodicalIF":3.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of indoor air quality through particulate matter, serum CRP levels and cardiopulmonary health of biomass using rural women","authors":"Pradip Mitra ,&nbsp;Supratim Pradhan ,&nbsp;Deep Chakraborty ,&nbsp;Budhaditya Mukherjee ,&nbsp;Utpal Dan ,&nbsp;Naba Kumar Mondal","doi":"10.1016/j.atmosenv.2025.121552","DOIUrl":"10.1016/j.atmosenv.2025.121552","url":null,"abstract":"<div><div>Air pollution is one of the major public health issues worldwide. Exposure to air pollution has been linked to various health-related issues, including respiratory and cardiovascular morbidity and mortality, although the exact pathophysiological mechanism remains elusive. The main focus of this study was to investigate the association between inflammatory and oxidative stress responses to indoor air pollution exposure. This study investigated the effect of indoor pollutants generated from biomass burning on biomarkers (i.e., Clara cell protein (CC16), C-reactive protein (CRP), interleukin-8 (IL-8) and 8-hydrox-2′-deoxyguanosine [8-OHdG]). One hundred healthy rural women aged 25–65 were recruited to investigate their cardiopulmonary health, blood biomarkers, and pollution status inside their kitchen rooms. Pollutant concentrations were monitored indoors with the time-activity of carbon monoxide (CO), particulate matter (PM₁₀, PM_2.5, PM₁), total volatile organic compounds (TVOCs), and formaldehyde (HCHO). Serum samples were analyzed for biomarkers using enzyme-linked immunosorbent assays (ELISA) to ensure precise measurements and enhanced sensitivity. Study results revealed higher particulate and gaseous pollutant concentrations in kitchen rooms of biomass users (<em>p</em> &lt; 0.001). In unadjusted analysis, baseline serum levels of CRP (7.96 vs. 1.68 mg/L; <em>p</em> &lt; 0.001), IL-8 (51.26 vs. 9.56 pg/mL; <em>p</em> &lt; 0.001), 8-OHdG (71.74 vs. 26.23 ng/mL; <em>p</em> &lt; 0.001) and LDH (335.1 vs. 227.65 U/L; <em>p</em> &lt; 0.001) were increased in biomass-exposed vs. clean fuel users, respectively, whereas serum levels of CC16 (4846.68 ± 832.37 pg/mL; <em>p</em> &lt; 0.001) were decreased. Study results revealed that particulate matter has strong positive correlations with CRP and IL-8 and a negative association with CC16 among biomass users. These findings suggest that chronic exposure to indoor pollutants may be associated with differences in markers of inflammation, lung epithelial injury, and oxidative DNA damage among tribal women. Further, this study may help explain abnormal cardiovascular and respiratory complications among rural tribal biomass fuel users.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121552"},"PeriodicalIF":3.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Indoor air quality in healthcare: Evaluating the risks of nitrogen and sulfur oxides in dental practices","authors":"Naseem Akhtar ,&nbsp;Arifa Tahir ,&nbsp;Zain Gulzar ,&nbsp;Abdul Qadir ,&nbsp;Baseer Ahmed ,&nbsp;Iqra Nasim","doi":"10.1016/j.atmosenv.2025.121551","DOIUrl":"10.1016/j.atmosenv.2025.121551","url":null,"abstract":"<div><h3>Objective</h3><div>This study aimed to assess indoor NO₂ and SO₂ levels in selected clinical and hospital dental units, identify sources linked to dental activities, and evaluate site and health risks from these gaseous oxides for students, professionals and patients, including immunocompromised.</div></div><div><h3>Method</h3><div>Ten different hospitals and clinical dental units were selected for this assessment.</div></div><div><h3>Key findings</h3><div>Annual average of 14.5 ± 4.6 μg/m³ of NO₂ and 8.0 ± 1.7 μg/m³ of SO₂ were recorded. A significant difference (&lt;0.05) in NO₂ and SO₂ levels was found, while non-significant differences (&gt;0.05) were observed between hospital and clinical units. Winter was more polluted due to higher gas levels, while spring was cleaner. Dunn's test showed a significant seasonal trend. Regression analysis revealed a robust (R² = 0.9) to moderately strong (R² = 0.6) correlation between the concentration of NO₂ and SO₂ except during winter (R² = 0.4). The highest levels of nitrogen oxides were found during anesthesia performance, and higher sulfur oxides were observed during dental implantation and impression performance. Negligible site risk was found except during winter. Indvisual HQ-SO₂ and HQ-NO₂ did not present significant health risks to dentists except for HQ-NO₂ to immunocompromised adult patients. Synergistic ΣHQ posed a significant HQ risk to immunocompromised patients at most dental units, but to adults at a few clinical sites.</div></div><div><h3>Conclusion</h3><div>Indoor and outdoor sources of pollutants should be closely monitored and controlled for patient safety and long-term exposure to dentists. Improve winter ventilation and use of high-evacuation system during high-exposure procedures, ensuring temperature and relative humidity are controlled.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121551"},"PeriodicalIF":3.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Health risk assessment of atmospheric fine particulate matter in China","authors":"Ziyue Wan,&nbsp;Yuxia Ma,&nbsp;Fengliu Feng,&nbsp;Zongrui Liu,&nbsp;Yuhan Zhao,&nbsp;Yufen Xia","doi":"10.1016/j.atmosenv.2025.121550","DOIUrl":"10.1016/j.atmosenv.2025.121550","url":null,"abstract":"<div><div>Atmospheric particulate matter (PM), recognized as a key constituent of airborne pollutants, is directly or indirectly related to public health. The impact of PM_2.5 on health is particularly serious and has received increasing attention. In this study, using the epidemiology-based health risk assessment model, we investigated the spatial-temporal characteristics of PM_2.5 concentrations and the health burden attributable to short-term PM_2.5 exposure across the country from 2017 to 2023 based on the ChinaHighPM_2.5 dataset, the national high-resolution population distribution data and population mortality data. The results revealed a marked downward trajectory in PM_2.5 levels in China between 2017 and 2023, with concentrations peaking during winter months and reaching annual minima in summer seasons. The population proportion with annual mean PM_2.5 exposure concentrations below 15 μg/m³ demonstrated a significant increase from 0.06 % to 2.03 %, while the proportion exceeding 35 μg/m³ exhibited a significant reduction from 67.54 % to 33.30 %. The highest nationwide excess risk (ER) decreased from 4.60 % to 2.99 %, and the mean values of ER in different regions decreased by 0.19 % (North China), 0.27 % (Central China), 0.63 % (East China), 0.67 % (South China), 0.32 % (Northeast China), 0.18 % (Northwest China) and 0.67 % (Southwest China), respectively. The total number of PM_2.5-associated excess deaths declined about 27.98 %, from 94,884 (95 % confidence interval [CI]: 46,417, 142,708) to 68,340 (95 % CI: 33,179, 103,376), with the highest excess deaths in East China.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"362 ","pages":"Article 121550"},"PeriodicalIF":3.7,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}