Atmospheric Environment最新文献

{"title":"Tropospheric ozone precursors over the Indian region: Insights into the shift toward a highly NOx-limited regime","authors":"Anoop Pakkattil,&nbsp;Sachin Ghude","doi":"10.1016/j.atmosenv.2025.121233","DOIUrl":"10.1016/j.atmosenv.2025.121233","url":null,"abstract":"<div><div>This study comprehensively analyzes trends in tropospheric ozone precursors over the Indian region from 2018 to 2024, focusing on nitrogen dioxide (NO₂), formaldehyde (HCHO), and glyoxal (CHOCHO), using TROPOMI onboard Sentinel-5 Precursor satellite datasets. Our results reveal contrasting trends: while HCHO and CHOCHO show consistent increases, NO₂ exhibits a slight decrease over the past few years, likely reflecting the impact of emission control measures. The mean growth rate calculated for HCHO Vertical Column Density (VCD) is ∼1.7 % yr⁻¹ and ∼2 % yr⁻¹ for CHOCHO, whereas tropospheric NO₂ VCDs show a slower growth rate of ∼ −0.21 %yr⁻¹, indicating a reduction in NO_x emissions over recent years. The growth rate of HCHO is consistent with findings from previous studies. However, unlike earlier long-term studies, a recent decline in NO₂ has been observed. Long-term OMI dataset measurements are used to corroborate these findings. Analysis of the formaldehyde-to-nitrogen ratio indicates that the Indian mainland region is mostly NO_x-limited in nature, and further shifts toward highly NO_x-limited ozone production are observed in most parts of the study area. Seasonal patterns show pronounced peaks in NO₂ during winter and HCHO and CHOCHO during pre- and post-monsoon seasons, underscoring the significant influence of biomass burning and agricultural activities on precursor levels. The seasonal variation in the Enhanced Vegetation Index (EVI) and fire density was analyzed to assess emissions from biogenic and pyrogenic sources. These findings emphasize the complexity of ozone precursor dynamics in India, highlighting the need for targeted emission controls to mitigate regional ozone pollution.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"353 ","pages":"Article 121233"},"PeriodicalIF":4.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850504","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":"Field observations of intermediate volatile organic compounds during haze events in three cities of northern China: Characteristics, sources and contributions to SOA formation","authors":"Minjun Jiang ,&nbsp;Xinxin Feng ,&nbsp;Yanli Feng ,&nbsp;Yanjie Lu ,&nbsp;Li Li ,&nbsp;Yingjun Chen ,&nbsp;Tian Chen","doi":"10.1016/j.atmosenv.2025.121232","DOIUrl":"10.1016/j.atmosenv.2025.121232","url":null,"abstract":"<div><div>Intermediate volatile organic compounds (IVOCs) are the most important precursor of secondary organic aerosols (SOA) in the atmosphere, and there remains a deficiency of in-depth research regarding their concentrations, compositions, sources, and contribution to SOA. In this study, IVOCs and PM_2.5 samples with high-temporal-resolution were collected during five winter haze episodes (defined as ZB-P1, ZB-P2, HEB-P1, HEB-P2, and ZK-P1) in three cities in northern China (Harbin, Zibo, and Zhoukou). Among the three sampling sites, Harbin (HEB) recorded the highest IVOCs (73.1 ± 20.9 μg/m³) and PM_2.5 (193.5 ± 62.7 μg/m³), followed by Zhoukou (ZK) 57.5 ± 40.5 μg/m³ and 153.3 ± 78.4 μg/m³, and the lowest was Zibo (ZB) 24.4 ± 11.1 μg/m³ and 130.5 ± 53.2 μg/m³. During all haze episodes, IVOC_UCM was the main component of IVOCs, but the second dominant components varied among the cities. IVOC_n-alkanes was the dominant component in ZB, While IVOC_PAHs in HEB, and IVOC_b-alkanes in ZK. IVOCs exhibited a statistically significant inverse correlation with PM_2.5 and SOA_OC/EC (R = −0.48). It was found that IVOC_PAHs exhibited the highest reactivity among the four categories and might contribute more significantly to SOA. For some n-alkanes and PAHs, Dodecane (n-C12), Heptadecane (n-C17), and Acenaphthene (ACE) were more reactive species. Using the PMF model and accounting for the photochemical loss of IVOCs, four sources of IVOCs were identified: gasoline exhaust, biomass/coal combustion, diesel-related emissions, and other sources (industrial sources and fireworks emissions). Biomass/coal combustion dominated (54.6 % and 58.1 %, observed and initial) in HEB, while industrial sources were predominant in ZB (63 % and 62.7 %), and fireworks were the main source in ZK (67.5 % and 68.2 %). Our results highlight that biomass/coal combustion, industrial sources and vehicle emissions remain the primary control objects. We also suggest that there is a need to strengthen the emission control strategy for PAHs in IVOCs.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"353 ","pages":"Article 121232"},"PeriodicalIF":4.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835135","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":"Source characteristics and gas-particle partitioning of alkylated polycyclic aromatic hydrocarbons in coal combustion emissions","authors":"Cheng Yang ,&nbsp;Fang Yin ,&nbsp;Hao Wang ,&nbsp;Xianbin Li ,&nbsp;Penghao Su ,&nbsp;Daolun Feng","doi":"10.1016/j.atmosenv.2025.121231","DOIUrl":"10.1016/j.atmosenv.2025.121231","url":null,"abstract":"<div><div>Investigations into the characteristics and phase-partitioning behavior of alkylated polycyclic aromatic hydrocarbons (alkyl-PAHs) during coal combustion process remain notably limited. This study aims to analyze the source characteristics, distribution patterns, and partitioning mechanisms of parent and alkyl-PAHs in gas and particle phase emissions from coal combustion. The results show that 30.77 %–49.37 % of parent PAHs from coking, gas, lean and fat coal combustion emissions are distributed in gas phases, while it accounts for 78.59 % in lignite coal combustion emission. In terms of alkyl-PAHs, 79.05 %–89.45 % of coking, gas and lean coal combustion emissions are presented in particle phases, and 62.66 %–69.32 % of lignite and fat coal combustion emissions are presented in gas phases. Moreover, the PAH <em>p</em>-values from coal combustion emissions are in the range of −1.00 to −0.68, and the alkylated ones range from −0.80 to −0.54. Interestingly, alkylated phenanthrenes maintain a high degree of uniformity in the distribution patterns of combustion emissions, and their bell-shape distribution pattern performs to be a potential indicator of coal combustion. Furthermore, by employing partitioning models, it can be proven that absorption and adsorption are governing PAH partitioning mechanisms, and alkyl-PAHs can reach equilibrium more rapidly than parent PAHs. These findings offer detailed data into source analysis and the fate of alkyl-PAHs from coal combustion, which is expected to be helpful for environmental behavior investigation and better pollution control of coal combustion.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"352 ","pages":"Article 121231"},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826249","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":"Recent advancements in observations, sources, and environmental effects of atmospheric hydrogen peroxide (H2O2)","authors":"Lian Duan ,&nbsp;Shuyuan Jia ,&nbsp;Xuran Li ,&nbsp;Yalong Wang ,&nbsp;Yiming Zhang ,&nbsp;Shuang Fu ,&nbsp;Yang Wang ,&nbsp;Can Ye ,&nbsp;Pengfei Liu ,&nbsp;Zongbo Shi ,&nbsp;Yujing Mu","doi":"10.1016/j.atmosenv.2025.121230","DOIUrl":"10.1016/j.atmosenv.2025.121230","url":null,"abstract":"<div><div>Atmospheric hydrogen peroxide (H₂O₂) is an important oxidant in the troposphere that impacts atmospheric oxidation capacity and plays key roles in S(IV) oxidation. In the past decade, researchers have proposed new H₂O₂ formation mechanisms as well as its significant environmental effects, based on field measurements, laboratory experiments, and modeling. However, these unconventional chemical processes related to atmospheric H₂O₂ have not been systematically reviewed, previous reviews on atmospheric H₂O₂ were published in the early 2000s. Herein, we review the recent atmospheric H₂O₂ studies throughout the world, mainly focusing on the observations, sources, and environmental effects of atmospheric H₂O₂. First, we summarize the temporal and vertical distributions of atmospheric H₂O₂ across urban, rural, mountainous, forested, and oceanic regions, as well as the upper atmosphere. Next, we discuss recent advancements in understanding potential sources of atmospheric H₂O₂ and its multiphase formation mechanisms. Finally, the increasing environmental effects of atmospheric H₂O₂, including its role in diagnosis of O₃-NO_x-VOCs sensitivity and significance in sulfate formation, are outlined. This review will help gain a comprehensive understanding of atmospheric H₂O₂ evolution and call for more future studies on atmospheric H₂O₂ to better deal with the current complex air pollution challenges.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"352 ","pages":"Article 121230"},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826338","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":"Influence of tourism on the local air quality in the Mountain Laoshan forest scenic areas","authors":"Yang Jiao ,&nbsp;Yangang Ren ,&nbsp;Jinhe Wang ,&nbsp;Ravi Yadav ,&nbsp;Shan Chen ,&nbsp;Chengtang Liu ,&nbsp;Jiangshan Mu ,&nbsp;Likun Xue ,&nbsp;Yujing Mu ,&nbsp;Abdelwahid Mellouki","doi":"10.1016/j.atmosenv.2025.121229","DOIUrl":"10.1016/j.atmosenv.2025.121229","url":null,"abstract":"<div><div>Tourism activities can have a significant impact on air quality in forest scenic areas. In this work, we measured the levels of volatile organic compounds (VOCs), including carbonyls and non-methane hydrocarbons (NMHCs), in the national forest park of Mountain Laoshan (Mt. Laoshan) in Qingdao, China, and evaluated the impact of these levels on air quality in this specific area. We found that during the May Day holidays (May 1–5, 2021), when the number of tourists is typically high, the average of VOCs total concentration was around 23.8 ± 22.6 ppbv, about 1.5 times higher than during periods with fewer tourists, ≈16.3 ± 15.2 ppbv. Most VOC species exhibited a bimodal profile diurnal variation during lunch and dinner periods. Using the Positive Matrix Factorization (PMF) model, five anthropogenic sources were identified, with liquefied petroleum gas (LPG) usage and traffic emissions being the two primary sources of VOCs in the Mt. Laoshan forest scenic area, respectively. The results indicate that tourism has a significant impact on atmospheric VOCs levels in the investigated area. Based on a 0-D model, we studied the effects of additional emissions from human activity on the atmospheric chemistry in the Mt. Laoshan forest scenic area. It was found that the additional NOx and VOCs emissions from tourism obviously increased the NO₃ reactivity during the night and OH formation during the daytime, which significantly increases the local atmospheric oxidation capacity. Therefore, this study emphasizes the significant impact of tourism activities, such as catering and traffic emissions, on the local air quality in forest scenic areas.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"353 ","pages":"Article 121229"},"PeriodicalIF":4.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143837969","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":"Deposition rates and air concentrations of tire and road wear particles near a motorway in Germany","authors":"Stephan Weinbruch,&nbsp;Jeannette Matthies,&nbsp;Linyue Zou,&nbsp;Konrad Kandler,&nbsp;Martin Ebert,&nbsp;Moritz Bigalke","doi":"10.1016/j.atmosenv.2025.121228","DOIUrl":"10.1016/j.atmosenv.2025.121228","url":null,"abstract":"<div><div>Tire and road wear particles (TRWP) are an important component of non-exhaust emissions from road traffic. They are internal mixtures of tire material, road wear, brake wear, and soil minerals. In contrast to tire material analysed by bulk analytical techniques, there is little literature on the air concentrations and deposition rates of TRWP. The main purpose of our study was to determine deposition rates and air concentrations of TRWP at a motorway in Germany. TRWP were collected with passive samplers and analysed by scanning electron microscopy. Number deposition rates varied between approximately 100 particles cm⁻² day⁻¹ at 3.5 m distance and 30 particles cm⁻² day⁻¹ at 30.5 m distance from the road, and mass deposition rates between 7.8 mg m⁻² day⁻¹ and 2.8 mg m⁻² day⁻¹, respectively. Air concentrations of TRWP calculated from the mass deposition rates varied between approximately 3.8 μg/m³ (3.5 m distance) and 0.95 μg/m³ (30.5 m distance). The influence of potential particle misclassification, density of TRWP, and volume approximation on the deposition rates and air concentrations is small. Air concentrations of TRWP observed in this study are reasonably consistent with the results of previous electron microscopy studies, but are significantly higher than the values used in risk assessment. This discrepancy clearly shows that further exposure measurements are required. The input of organic additives such as benzothiazole and N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) as well as carbon, sulfur and zinc through deposition in road soils should be taken into account when assessing the environmental impact of TRWP.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"352 ","pages":"Article 121228"},"PeriodicalIF":4.2,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808664","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":"Characterization of chemical and bioreactivity properties of photooxidation reaction products from secondary organic aerosols (SOA) under high OH exposure condition","authors":"Ka Hei Lui ,&nbsp;Xinye Zhu ,&nbsp;Yik-Sze Lau ,&nbsp;Tianhang Zhang ,&nbsp;Gehui Wang ,&nbsp;Hsiao-Chi Chuang ,&nbsp;Kin Fai Ho","doi":"10.1016/j.atmosenv.2025.121212","DOIUrl":"10.1016/j.atmosenv.2025.121212","url":null,"abstract":"<div><div>The chemical and bioreactivity properties of photooxidation products emitted during high radical exposure conditions were characterized. The purpose was to simultaneously investigate the influences of the toxicity of photooxidation products from common anthropogenic and biogenic precursors (toluene, <em>m</em>-xylene and isoprene). The major ring-opening compounds were identified as pyruvic acid (C₃H₄O₃), glyceric acid (C₃H₆O₄), succinic acid (C₄H₆O₄), malic acid (C₄H₆O₅), tartaric acid (C₄H₆O₆), 2,3-dihydroxy-glutaric acid (C₅H₈O₆), glycolic acid (C₂H₄O₃) and oxalic acid (C₂H₂O₄) originated from the toluene and xylene-derived secondary organic aerosol (SOA) products in the analysis. The average LDH level from isoprene-derived SOA (0.77 μg/ml) was higher than the control (0.75 μg/ml) and the DCFH level from isoprene-derived SOA (228.73 RFU) was also higher than the control (215.18 RFU). In addition, the average LDH level from toluene-derived SOA (0.86 μg/ml) was higher than the isoprene (0.77 μg/ml). The IL-6 level from toluene-derived SOA (182.82 pg/ml) was higher than the xylene-derived SOA (173.00 pg/ml). These suggested enhanced cytotoxicity and cell membrane damage under toluene-derived SOA exposure. The isoprene-derived SOA induced higher DCFH levels of (228.73 RFU), implying the potential effects of particulate matter from SOA on the oxidative potential and rising cellular oxidant burden. The overall results suggest that the oxidation products can potentially cause various cytotoxic effects. This finding warrants further investigation into the toxicity profiles of SOA and regulation of SOA pollution.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"352 ","pages":"Article 121212"},"PeriodicalIF":4.2,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808663","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":"Deducing atmospheric conditions that contribute to elevated pollution events in the Salton Sea Air Basin","authors":"Heather C. Lieb ,&nbsp;Ian C. Faloona","doi":"10.1016/j.atmosenv.2025.121191","DOIUrl":"10.1016/j.atmosenv.2025.121191","url":null,"abstract":"<div><div>The Salton Sea Air Basin (SSAB) has struggled to comply with National Ambient Air Quality Standards (NAAQS) for three federally regulated air pollutants: ozone, PM_2.5, and PM₁₀. Seasonal and diurnal patterns are presented along with their long-term decadal trends to better understand the relationship between the meteorological setting and air pollution levels as well as their deviations. This analysis revealed that ozone exceedances are no longer dominated by regulated NO_x emissions but rather are primarily controlled by regional agricultural soil emissions. These emissions are also likely influenced by stratospheric ozone transport to the deep convective boundary layers unique to the area. Observed peak ozone levels are still ∼2–5 ppb lower on weekends indicative of a NO_x-limited regime during the warm season. This implies that local ozone production is directly dependent on NO_x levels, which emphasizes the need to address unregulated sources of NO_x pollution such as those from heavily fertilized, arid agricultural soils. Additionally, strong correlations of PM_2.5 with NO_x, PM₁₀, and CO, indicate that influences from combustion sources as well as agricultural soils, secondary formation, and mechanical processes are all important sources of PM_2.5 production in Calexico, the main city of PM_2.5 nonattainment on the southern border with Mexico. These PM_2.5 exceedances occur in winter months, when low ventilation accumulates localized PM_2.5 precursor emissions. Source apportionment of PM_2.5 was assessed using non-negative matrix factorization of data from the Chemical Speciation Network (CSN) site in Calexico. The CSN data analysis for Calexico identifies biomass burning as the dominant source of high PM_2.5 concentrations, followed by agricultural soil emissions and wind-blown dust. In the immediate vicinity of the Salton Sea, less frequent PM_2.5 exceedances seem to be associated with occasional windstorms. Further, analysis of PM₁₀ exceedance days indicates that high winds, primarily westerly, are a critical factor, and the low PM_2.5/PM₁₀ ratios suggest minimal contribution from photochemical or combustion sources. Furthermore, the correlation of PM₁₀ with wind speed across various sites underscores the importance of dust resuspension and soil erosion. This comprehensive assessment highlights the complexity of air quality problems in the SSAB. Additionally, it emphasizes the need for targeted and localized air quality management strategies for this region which, despite its low population, suffers some of the worst air pollution impacts in the state of California.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"352 ","pages":"Article 121191"},"PeriodicalIF":4.2,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824294","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":"Drivers for the trends of atmospheric inorganic nitrogen deposition in China under the past and future scenarios","authors":"Zihan Zhang ,&nbsp;Dan Yan ,&nbsp;Mengmeng Li ,&nbsp;Yuting Lu ,&nbsp;Yiting Zhou ,&nbsp;Tijian Wang ,&nbsp;Bingliang Zhuang ,&nbsp;Shu Li ,&nbsp;Xin Huang","doi":"10.1016/j.atmosenv.2025.121221","DOIUrl":"10.1016/j.atmosenv.2025.121221","url":null,"abstract":"<div><div>Atmospheric inorganic nitrogen deposition has changed dramatically across China over the recent decades, exerting profound impacts on regional climate and ecosystem. Here we present an observation- and model-based analysis to disentangle the trends of atmospheric inorganic nitrogen deposition in China, in response to the emission and climate changes, under the past (2013–2022) and future (2020–2050) scenarios. Both observational evidence and model results indicate an obvious declining trend of the national-average inorganic nitrogen deposition across China from 19.31 kg N ha⁻¹ yr⁻¹ to 14.64 kg N ha⁻¹ yr⁻¹ (−24.2 %) between 2013 and 2022, of which wet and dry deposition declines by −15.8 % and −33.4 %, respectively. Using a series of regional climate-chemistry coupled simulations, we find that the declined inorganic nitrogen deposition in 2013–2022 results comparably from the recent emission changes (69.8 % for oxidized nitrogen and 48.1 % for reduced nitrogen) and precipitation decreases. We further predict a significant decrease in inorganic nitrogen deposition under the SSP245 (−39.18 %) and SSP585 (−47.33 %) scenarios in the near-future. Overall, the contribution of emission reductions surpasses that of climatic changes and dominates the projected declining trends in inorganic nitrogen deposition. This paper provides some important insights into the drivers of atmospheric inorganic deposition in China and lays the foundation for assessing the effectiveness of emission control policies on atmospheric nitrogen deposition reduction.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"352 ","pages":"Article 121221"},"PeriodicalIF":4.2,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792658","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":"The future underlying differential response of surface ozone to biogenic emissions in China (2019–2060)","authors":"Wenpeng Wang ,&nbsp;Ying Wang ,&nbsp;Xiangyue Chen ,&nbsp;Xiaodong Zhang ,&nbsp;Tan Xu ,&nbsp;Yuan Zhao ,&nbsp;Lei Ma ,&nbsp;Bolong Chen ,&nbsp;Hongchao Zuo","doi":"10.1016/j.atmosenv.2025.121206","DOIUrl":"10.1016/j.atmosenv.2025.121206","url":null,"abstract":"<div><div>China's major megacity clusters experience severe summer ozone pollution, posing significant public health risks. In the context of declining anthropogenic emissions and increasing biogenic emissions driven by climate warming, understanding future surface ozone trends and their response to biogenic emissions is critical. This study integrates advanced biogenic emission and geochemical models to assess the impact of vegetation changes on ozone pollution in key regions—Beijing-Tianjin-Hebei (JJJ), Shandong (SDC), Chengdu-Chongqing (CCC), Fenwei Plain (FWP), Mid-Yangtze (MYC), Guangdong-Hong Kong-Macao Greater Bay Area (GHM), and Yangtze River Delta (YRD)—under 2030 and 2060 climate scenarios. Results demonstrate intensified ozone pollution by 2030 in GHM, MYC, FWP, and SDC, and by 2060 in JJJ, FWP, and GHM. The Random Forest model attributes ∼76.0 % of future ozone changes to biogenic emissions. Ozone source apportionment (OSAT) and brute force (BF) methods reveal increasing biogenic contributions to ozone formation in most scenarios. Mechanistic analysis shows biological nitrogen oxides (BNO_x) play a larger role than biogenic volatile organic compounds (BVOCs), especially in northern China with high nitrogen fertilizer use. While rising BVOCs increase RO₂ radicals, their ozone impact depends on NO_x levels: in NO_x-rich regions, BVOCs promote ozone via RO₂+NO reactions; in NO_x-scarce regions, RO₂+HO₂ reactions dominate, reducing ozone through competitive effects. This effect is observed in megacity clusters when P(H₂O₂)/P(HNO₃) exceeds 9. Overall, this study highlights the pivotal role of biogenic emissions in shaping China's future ozone pollution under climate and vegetation changes.</div></div>","PeriodicalId":250,"journal":{"name":"Atmospheric Environment","volume":"352 ","pages":"Article 121206"},"PeriodicalIF":4.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824295","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}