Atmospheric Environment最新文献_第7页

Retrieval of precipitable water vapor from sun–sky radiometer (POM-01) at 940 nm absorption band: Calibration, measurement and validation 940nm吸收波段太阳辐射计（POM-01）可降水量的反演：校正、测量和验证

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2026-01-07 DOI: 10.1016/j.atmosenv.2026.121789

Swagata Mukhopadhyay , Shantikumar S. Ningombam , Akihiro Uchiyama , Sonam Jorphail , Chiranjeevi G. Vivek , T.S. Shrungeshwara , Sreedevi P. , Tsuneo Matsunaga , Som K. Sharma , Pawan Gupta , Dorje Angchuk , Sridevi Jade

Sun–sky radiometer (model POM-01) is commonly used for studying aerosol optical and physical properties at selected aerosol-specific channels. Although the instrument is equipped with a precipitable water vapor (PWV) channel at 940 nm, the inbuilt software does not provide a tool for estimation of PWV. Hence, the current study adopted a new methodology to estimate PWV from three high-altitude (

>

3400 m MSL) sites, Hanle, Merak, and Leh, located in Ladakh, India. The retrieval algorithm focuses on the precise estimation of the calibration constant (

V_{0}

) and coefficients

a

and

b

using modified Langley plots in two different methods. The estimated average value of

b

is 0.59 ± 0.09 which is very close to those commonly used in global studies. Further, the estimated

V_{0}

and

b

values from both methods are found to be similar, which may be due to the advantages of the dry and high-altitude environment, where the annual total column water vapor is typically less than 6 mm. The estimated PWV using observations at selected full clear and stable atmospheric conditions compares well with satellite, AERONET, GPS, reanalysis and empirical model data with correlation coefficient varying from 0.91 to 0.97. Further, the estimated propagated root mean square error (rmse) varies from 0.37 mm to 2.58 mm. These results indicated that sun–sky radiometer derived PWV showed good consistency with the derived PWV from independent data sources at the three sites.

太阳-天空辐射计（型号POM-01）通常用于在选定的气溶胶特定通道上研究气溶胶的光学和物理特性。虽然仪器配备了940 nm的可降水量（PWV）通道，但内置软件不提供估算PWV的工具。检索算法的重点是在两种不同的方法中使用修正的Langley图精确估计校准常数（V0）和系数a和b。b的估计平均值为0.59±0.09，与全球研究中常用的值非常接近。此外，两种方法估计的V0和b值相似，这可能是由于干燥和高海拔环境的优势，其中年总水柱水蒸气通常小于6 mm。与卫星、AERONET、GPS、再分析和经验模型资料的相关系数在0.91 ~ 0.97之间，在选定的完全晴朗和稳定的大气条件下，利用观测资料估算的PWV具有较好的一致性。此外，估计的传播均方根误差（rmse）从0.37 mm到2.58 mm不等。结果表明，日空辐射计所得的PWV与三个站点独立数据源所得的PWV具有较好的一致性。

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引用次数: 0

Emissions of hazardous chemicals from baby crawling and yoga mats: Implications for indoor air quality mediated by placement orientation 婴儿爬行和瑜伽垫的有害化学物质排放：放置方向对室内空气质量的影响

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2026-01-08 DOI: 10.1016/j.atmosenv.2026.121791

Chun-Yan Chen , Yun Hong , Chen-Chou Wu , Lian-Jun Bao , Eddy Y. Zeng

Potential adverse effects of indoor air quality derived from the extensive and large-scale use of baby crawling and yoga mats have been increasingly recognized. However, the potentiality of chemicals released from these products under various placement orientation has yet to be adequately addressed. To fill this knowledge gap, baby crawling and yoga mats were selected to measure the emissions of hazardous chemicals from specific surfaces under various placement orientations. The results showed that placement directions had considerable impacts on the masses of emitted formamide, diisobutyl phthalate, benzothiazole, and p-bis(2-hydroxyisopropyl)benzene with vertical placement resulting in 1.1–3.3 times more masses than horizontal placement (p < 0.05). In comparison, the amounts of emitted chlorinated paraffins, bis(2-ethylhexyl) phthalate, and di-(2-ethylhexyl)terephthalate were comparable between the vertical and horizontal placements (0.80–1.8 times). The increased amount of formamide derived from changing placement orientation (50–60 %; from horizontal to vertical) was greater than that from temperature-induced emission (10–20 %; from 25 °C to 35 °C). The mats with waterproof layer on surface were more effective in hindering formamide emissions compared to those with bossed patterns and untreated surfaces. When yoga mats were rolled up and placed vertically, the concentrations of chemicals emitted indoor were equivalent to or even greater than those emitted from horizontally placed mats during use, even though the exposed areas were reduced. The present study demonstrated that placement direction is a pivotal factor in regulating chemical emissions, with significant implications for improving indoor air quality.

广泛和大规模使用婴儿爬行和瑜伽垫对室内空气质量的潜在不利影响已经越来越多地认识到。然而，这些产品在不同放置方向下释放的化学物质的潜力尚未得到充分解决。为了填补这一知识空白，我们选择了婴儿爬行垫和瑜伽垫来测量不同放置方向下特定表面的有害化学物质排放。结果表明，放置方向对甲酰胺、邻苯二甲酸二异丁酯、苯并噻唑和对双（2-羟基异丙基）苯的释放质量有较大影响，垂直放置的释放质量是水平放置的1.1 ~ 3.3倍（p < 0.05）。相比而言，氯化石蜡、邻苯二甲酸二（2-乙基己基）酯和对苯二甲酸二（2-乙基己基）酯的排放量在垂直和水平位置之间相当（0.80-1.8倍）。改变放置方向（50 - 60%，从水平到垂直）产生的甲酰胺量增加大于温度诱导排放（10 - 20%，从25°C到35°C）。表面有防水层的垫子比那些有凸起图案和未处理表面的垫子更有效地阻止甲酰胺的排放。当瑜伽垫被卷起并垂直放置时，在使用过程中，室内排放的化学物质浓度相当于甚至大于水平放置的垫子，即使暴露的面积减少了。本研究表明，放置方向是调节化学物质排放的关键因素，对改善室内空气质量具有重要意义。

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引用次数: 0

A spatial regression analysis of the association between PM2.5 and early childhood development outcomes in South Africa using the 2021 Thrive by Five Index 使用2021年五大茁壮成长指数对PM2.5与南非儿童早期发展结果之间关系的空间回归分析

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.atmosenv.2026.121801

Junita Henry , Yazan Alwadi , Marcia C. Castro

Background

South Africa experiences high levels of ambient air pollution, with PM2.5 concentrations routinely exceeding WHO guidelines of 5 μg/m³. Early childhood represents a critical window of neurodevelopmental vulnerability, yet the impacts of postnatal PM2.5 exposure on developmental outcomes remain underexplored in this context.

Methods

We analysed nationally representative data on 5222 children aged 50–59 months attending 1248 Early Learning Programmes (ELPs) across South Africa, using the Early Learning Outcomes Measure 4&5 (ELOM) to assess development across five domains. Twelve-month cumulative PM2.5 exposure at each ELP was estimated using satellite-derived, ground-calibrated data. Spatial lag and error models were employed to account for residual spatial autocorrelation.

Results

A 10 μg/m³ increase in PM2.5 exposure was associated with lower total ELOM scores (β = −0.12 SD, p < .05), with the largest associations observed for gross motor development (β = −0.17 SD, p < .01) and fine motor coordination (β = −0.12 SD, p < .05). No significant associations were detected for executive functioning, literacy, or numeracy domains.

Conclusion

This study provides evidence of associations between ambient PM2.5 exposure and specific developmental domains in preschool-aged children in South Africa. The findings highlight the need to integrate air quality interventions into early childhood policy and to further research mechanisms, exposure timing, and mitigation.

南非的环境空气污染水平很高，PM2.5浓度经常超过世卫组织5 μg/m3的指导标准。幼儿期是神经发育脆弱性的关键窗口期，但在此背景下，出生后PM2.5暴露对发育结果的影响仍未得到充分探讨。方法我们分析了南非参加1248个早期学习计划（elp）的5222名年龄在50-59个月的儿童的全国代表性数据，使用早期学习成果测量4和5 （ELOM）来评估五个领域的发展。每个ELP的12个月累积PM2.5暴露量是使用卫星衍生的地面校准数据估计的。利用空间滞后和误差模型来解释残差空间自相关。结果PM2.5暴露增加10 μg/m3与ELOM总评分降低相关（β = - 0.12 SD, p < 0.05），其中大运动发育（β = - 0.17 SD, p < 0.01）和精细运动协调（β = - 0.12 SD, p < 0.05）的相关性最大。在执行功能、读写能力或计算能力方面没有发现显著的关联。本研究提供了环境PM2.5暴露与南非学龄前儿童特定发育领域之间关联的证据。研究结果强调需要将空气质量干预措施纳入幼儿政策，并进一步研究机制、暴露时间和缓解措施。

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引用次数: 0

Fire emissions modulate wildfire spread through aerosol-meteorology feedbacks: Insights from a novel WRF-Chem/Fire coupled model 火灾排放通过气溶胶-气象反馈调节野火蔓延：来自新型WRF-Chem/Fire耦合模型的见解

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2026-01-03 DOI: 10.1016/j.atmosenv.2026.121772

Zhonghua He , Jie Luo , Congcong Li , Gaofeng Fan , Bin Xu , Lingxiang Wang , Zhao-Cheng Zeng , Dongmei Huang , Yuping Sun , Hao He

Wildfires represent a devastating global natural hazard, with profound ecological, economic, and societal impacts. Accurate prediction of fire behavior is paramount, yet state-of-the-art models like WRF-Fire often neglect the critical meteorological feedbacks induced by fire-emitted aerosols. To address this gap, this study develops a novel modeling framework that integrates WRF-Chem with WRF-Fire to systematically quantify how smoke-radiation interactions influence near-surface meteorology and subsequent fire behavior. Through a series of sensitivity experiments, we demonstrate that fire emissions trigger a complex, time-dependent feedback loop. Initially, aerosols suppress near-surface winds and moderate temperatures in our simulations, leading to a slower Rate of Spread (ROS) and a constrained burned area. However, as the fire persists, the accumulated emissions fundamentally alter the local atmosphere, intensifying the wind field through fire-induced circulations. This results in a dramatic reversal, with the ”With Fire” scenario subsequently exhibiting the most rapid fire front propagation. Our analysis reveals that the integrated radiative effect of all aerosols, rather than the contribution of any single species like black carbon (BC) or organic carbon (OC), is the dominant driver of these meteorological perturbations. This work concludes that incorporating these dynamic, time-evolving aerosol-meteorology-fire feedbacks is not a mere refinement but a crucial necessity for advancing the predictive accuracy of wildfire models, especially for extreme events, thereby informing more effective mitigation and response strategies.

野火是一种破坏性的全球自然灾害，具有深远的生态、经济和社会影响。对火灾行为的准确预测是至关重要的，然而像WRF-Fire这样的最先进的模型往往忽略了由火灾排放的气溶胶引起的关键气象反馈。为了解决这一差距，本研究开发了一个新的建模框架，将WRF-Chem与WRF-Fire集成在一起，系统地量化烟雾辐射相互作用如何影响近地面气象学和随后的火灾行为。通过一系列的灵敏度实验，我们证明了火灾排放触发了一个复杂的、随时间变化的反馈回路。最初，在我们的模拟中，气溶胶抑制了近地面的风和温和的温度，导致较慢的传播速度（ROS）和受限的燃烧面积。然而，随着火灾的持续，累积的排放物从根本上改变了当地的大气，通过火灾引起的环流加强了风场。这导致了戏剧性的逆转，“有火”场景随后显示出最快速的火锋传播。我们的分析表明，所有气溶胶的综合辐射效应，而不是任何单一物种的贡献，如黑碳（BC）或有机碳（OC），是这些气象扰动的主要驱动因素。这项工作的结论是，结合这些动态的、随时间变化的气溶胶-气象-火灾反馈不仅仅是一种改进，而且对于提高野火模型的预测准确性至关重要，特别是对于极端事件，从而为更有效的缓解和应对策略提供信息。

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引用次数: 0

Unexpected larger NMVOCs emissions of Chinese stainless steel than carbon steel production: insights from field measurements 中国不锈钢的NMVOCs排放量意外大于碳钢生产：来自现场测量的见解

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.atmosenv.2026.121796

Yiting Li , Haotian Liu , Lei Zhang , Shuanzhu Sun , Rongrong Wu , Weizhe Zhou , Jiewen Zhu , Yu Zhao

The emissions of non-methane volatile organic compounds (NMVOCs) worsen air quality and pose potential health and environmental risks. The steel industry is an important NMVOCs source category, yet studies on NMVOCs emissions in steel industry remains limited, particularly for stainless steel manufacturing. This study presents a field investigation of NMVOCs emissions for different processes in both stainless steel and carbon steel plants, revealing clear differences in emission characteristics between them. The results show that the NMVOCs emissions were higher in stainless steel production, with notable different species profiles compared to carbon steel plant. The emission of carbon disulfide during the sintering process in stainless steel manufacturing was lower compared to carbon steel production. These discrepancies were attributed to the different raw materials used for production of the two types of steel, and higher fuel consumption and lower combustion efficiency for stainless steel production. The NMVOCs emission factor for stainless steel sintering was 40 times higher than that of carbon steel sintering, thus the NMVOCs emissions from steel production could be underestimated without consideration of this high emission factor. In addition, this study examined the impact of air pollution control devices (APCDs) on NMVOCs emissions for steel production. Selective catalytic reduction (SCR) and flue gas desulfurization (FGD) technologies demonstrated great NMVOCs removal efficiency, while fabric filter (FF) might elevate NMVOCs emissions. The diverse effects resulted primarily from the removal mechanisms of these APCDs and the physicochemical properties of NMVOCs. Through field measurements, this study improves the understanding of NMVOCs emission characteristics in the steel manufacturing industry and provides valuable insights for development of NMVOCs emission control strategies.

非甲烷挥发性有机化合物（NMVOCs）的排放使空气质量恶化，并构成潜在的健康和环境风险。钢铁行业是NMVOCs的重要来源类别，但对钢铁行业特别是不锈钢制造业NMVOCs排放的研究仍然有限。本研究对不锈钢和碳钢工厂不同工艺的NMVOCs排放进行了实地调查，发现两者在排放特征上存在明显差异。结果表明：不锈钢工厂的NMVOCs排放量高于碳钢工厂，且存在显著的物种分布差异；与碳钢生产相比，不锈钢生产中烧结过程中二硫化碳的排放量较低。这些差异归因于用于生产两种钢的不同原材料，以及不锈钢生产的高燃料消耗和低燃烧效率。不锈钢烧结的NMVOCs排放系数比碳钢烧结的NMVOCs排放系数高40倍，如果不考虑不锈钢烧结的NMVOCs排放系数高，钢铁生产的NMVOCs排放量可能会被低估。此外，本研究还考察了空气污染控制装置（apcd）对钢铁生产中NMVOCs排放的影响。选择性催化还原（SCR）和烟气脱硫（FGD）技术对NMVOCs的去除效果较好，而织物过滤器（FF）可能会增加NMVOCs的排放量。这些不同的影响主要是由apcd的去除机制和NMVOCs的物理化学性质决定的。通过现场测量，提高了对钢铁制造业NMVOCs排放特征的认识，为制定NMVOCs排放控制策略提供了有价值的见解。

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引用次数: 0

Minute-scale point source simulation: Rapid transient impact assessment 分尺度点源模拟：快速瞬态影响评估

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2025-12-25 DOI: 10.1016/j.atmosenv.2025.121757

Liang Li , Chongyu Zhang , Wei Zhang , Huaqiao Gui , Weiwei Xue , Zheng Shi , Zifa Wang , Ting Yang

Abrupt or intermittent emissions can significantly increase regional pollutants and dominate short-term variations, but previous simulations usually treated emissions through total amounts and allocation coefficients, making it difficult to effectively characterize their concentration variation features at the minute-scale. This study proposes a rapid simulation framework for minute-scale high-resolution emission modeling under such scenarios. Integrating multisource background emissions, it assessed Hefei Airport impacts (December 2023). Evaluations confirm accurate simulation of meteorological/air pollutant spatial distributions and effective capture of minute-scale emission characteristics. Airport emissions moderately intensified near-surface temperature inversion downwind of Hefei. Near-airport monthly mean NO₂ and NO rose by 4 μg/m³ and 9 μg/m³, respectively. Emissions also impacted a 15 km radius, elevating NO₂ by 0.6–1.8 μg/m³ and NO by 0–2.5 μg/m³. The framework effectively evaluates regional atmospheric impacts from point-source abrupt/intermittent emissions, enabling rapid localized simulations for scientific assessment and prediction to protect air quality and public health.

突发性或间歇性排放会显著增加区域污染物，并主导短期变化，但以往的模拟通常通过总量和分配系数来处理排放，难以在分尺度上有效表征其浓度变化特征。本研究提出了一种快速模拟框架，用于此类情景下的分钟尺度高分辨率排放建模。综合多源本底排放，评价了合肥机场2023年12月的影响。评估证实了对气象/空气污染物空间分布的准确模拟和对分尺度排放特征的有效捕获。合肥下风近地面逆温变温中机场排放偏强。近机场月平均NO2和NO分别上升4和9 μg/m3。排放也影响了15公里半径，NO2升高0.6-1.8 μg/m3， NO升高0-2.5 μg/m3。该框架有效地评估了点源突然/间歇排放对区域大气的影响，使科学评估和预测的快速局部模拟成为可能，从而保护空气质量和公众健康。

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引用次数: 0

Source apportionment of fine and coarse particulate matter in Hong Kong and its implications to PM10 air quality management 香港细、粗颗粒物的来源分析及其对PM10空气质素管理的影响

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2025-12-31 DOI: 10.1016/j.atmosenv.2025.121763

Yee Ka Wong , Kin Man Liu , Claisen Yeung , Kenneth K.M. Leung , Jian Zhen Yu

Effective control of ambient respirable particulate matter (PM₁₀, particles with aerodynamic diameters less than 10 μm) is essential for air quality management for public health protection. Achieving this requires targeted strategies that address both fine particles (PM_2.5, less than 2.5 μm) and coarse particles (PM_coarse, between 2.5 and 10 μm). In this study, we conducted a two-year field monitoring campaign in an urban residential area in Hong Kong to simultaneously characterize the chemical compositions and sources of PM_2.5 and PM_coarse. Nearly half (46 %) of PM₁₀ mass was associated with PM_coarse, with individual species exhibiting distinct distribution patterns across the two size fractions. Transition metals known for their roles in PM oxidative potential (e.g., Mn and Cu) were found to be evenly distributed between fine and coarse modes, underscoring the need for further assessments of their size-resolved health effects. Source apportionment using positive matrix factorization showed that PM_2.5 was mainly influenced by secondary sulfate and nitrate formation, road traffic and biomass/coal combustion, whereas PM_coarse was dominated by soil/industrial dust, construction/copper-rich dust and sea salt. Backward air mass trajectory analysis identified a 28 μg/m³ increase in PM₁₀ source contribution under continental air mass influences compared to marine air masses. Coarse-mode soil and industrial dust, primarily transported from inner-continental regions, accounted for 40 % of this excess contribution. This work highlights the growing importance of addressing PM_coarse on a regional scale in future air quality research and control strategies to meet PM₁₀ air quality targets.

有效控制环境可吸入颗粒物（PM10，空气动力学直径小于10 μm的颗粒物）是空气质量管理和公众健康保护的必要条件。要实现这一目标，需要针对细颗粒（PM2.5，小于2.5 μm）和粗颗粒（PMcoarse, 2.5 - 10 μm）采取有针对性的策略。在这项研究中，我们在香港的一个城市住宅区进行了为期两年的实地监测活动，同时表征PM2.5和PMcoarse的化学成分和来源。近一半（46%）的PM10质量与pm粗粒有关，个别物种在两种大小的组分中表现出不同的分布模式。已知其在PM氧化电位中的作用的过渡金属（例如，Mn和Cu）被发现均匀分布在细和粗模式之间，强调需要进一步评估其尺寸决定的健康影响。采用正矩阵分解法进行污染源解析，PM2.5主要受二次硫酸盐和硝酸盐形成、道路交通和生物质/煤炭燃烧的影响，而pm粗颗粒物主要受土壤/工业粉尘、建筑/富铜粉尘和海盐的影响。逆向气团轨迹分析发现，与海洋气团相比，大陆气团影响下的PM10源贡献增加了28 μg/m3。主要来自内陆地区的粗态土壤和工业粉尘占这一超额贡献的40%。这项工作强调了在未来的空气质量研究和控制策略中，在区域范围内解决pm粗颗粒的重要性，以实现PM10空气质量目标。

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引用次数: 0

Plant uptake and air-soil exchange of PAHs on university campuses: A tale of species differences, mechanisms and seasonal variation 大学校园植物对多环芳烃的吸收和空气-土壤交换：物种差异、机制和季节变化

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2025-12-30 DOI: 10.1016/j.atmosenv.2025.121766

Fengwen Wang , Hongtao Si , Decai Liu , Jiayan Yu , Neil L. Rose , Hai Guo

Polycyclic aromatic hydrocarbons (PAHs) are semi-volatile organic pollutants of global concern due to their ubiquity, persistence, potential carcinogenicity, and complex intermedia exchange behaviors. This study investigates the occurrence, composition, and transport mechanisms of PAHs across air, soil, and plants on university campuses with high densities of young adults (aged 18–30). Annual mean concentrations of gaseous ∑₁₆ PAHs (total of 16 USEPA priority PAHs) were 40 ± 14 ng/m³, with 2–3 ring PAHs comprising 59.6 % of the total. Soils accumulated up to 1000 ± 710 ng/g, dominated by 4 ring (37.8 %) and 5–6 ring PAHs (36.5 %). Leaf concentrations averaged 290 ± 160 ng/g, with species-specific accumulation varying up to 5-fold, influenced by wax content (34 ± 28 g/m²), specific leaf area (210 ± 80 cm²/g), and stomatal density (69 ± 38 stomata/mm²). According to McLachlan's framework for semi-volatile organic compounds (SOCs) in plants, dynamic equilibrium between the gaseous phase and plants dominated uptake in spring, autumn, and winter, while atmospheric gaseous deposition was predominant in summer. Mackay's fugacity model indicated that 3-ring PAHs (e.g., acenaphthylene, acenaphthene) showed net volatilization (ff > 0.5), with annual mean fluxes of 368 ng/m²/day (main campus) and 173 ng/m²/day (new campus), whereas 4–6 ring PAHs tended to deposit (ff < 0.5). These findings highlight the importance of considering spatial heterogeneity, species-specific plant traits, and seasonal dynamics when assessing the fate and exposure risks of PAHs in urban green spaces, particularly within densely populated university campuses.

多环芳烃（PAHs）是一种半挥发性有机污染物，因其普遍存在、具有持久性、潜在致癌性和复杂的中间体交换行为而受到全球关注。本研究调查了18-30岁年轻人密集的大学校园空气、土壤和植物中多环芳烃的存在、组成和运输机制。气态∑16 PAHs（共16种USEPA重点PAHs）的年平均浓度为40±14 ng/m3，其中2-3环PAHs占59.6%。土壤PAHs累积量为1000±710 ng/g，以4环（37.8%）和5-6环（36.5%）为主。叶片浓度平均为290±160 ng/g，物种特异性积累变化高达5倍，受蜡含量（34±28 g/m2）、比叶面积（210±80 cm2/g）和气孔密度（69±38气孔/mm2）的影响。根据McLachlan的植物半挥发性有机化合物（SOCs）框架，春、秋、冬季以气相与植物之间的动态平衡为主，夏季以大气气态沉积为主。Mackay的逸出度模型表明，3环多环芳烃（如苊、苊）呈现净挥发（ff > 0.5），年平均通量为368 ng/m2/day（主校区）和173 ng/m2/day（新校区），而4-6环多环芳烃趋于沉积（ff < 0.5）。这些发现强调了在评估城市绿地（特别是人口密集的大学校园）中多环芳烃的命运和暴露风险时，考虑空间异质性、物种特异性植物性状和季节动态的重要性。

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引用次数: 0

Enhancing aerosol ingestion estimates in airport proximity for modeling aircraft engine deterioration - a case study for black carbon 为模拟飞机发动机退化而加强机场附近气溶胶摄入估计——以黑碳为例研究

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2026-01-12 DOI: 10.1016/j.atmosenv.2026.121797

Erik Seume , Barbara Harm-Altstädter , Lutz Bretschneider , Jan Goeing

Aerosols influence the climate system, human health, and the surfaces of machines. The ingestion of aerosols into aircraft engines leads to fouling, erosion, and performance deterioration. This study evaluates data sources used for engine deterioration modeling. For this purpose, a comparison of atmospheric composition reanalysis data with in-situ measurements of a commonly modeled and frequently occurring aerosol species, namely hydrophobic black carbon, is presented. High-resolution observations are obtained from a field campaign performed with the uncrewed aerial system ALADINA (Application of Light-weight Aircraft for Detecting IN-situ Aerosol), near the German airport Berlin-Brandenburg in October 2021. A total of 140 vertical profiles of hydrophobic black carbon and meteorological parameters are compared with mass mixing ratios extracted from two different atmospheric composition reanalysis datasets, the European Centre for Medium-Range Weather Forecast Atmospheric Composition Reanalysis 4 (EAC4) and the Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2). The differences between model outputs and atmospheric measurements are large. 95% of the deviations between measurements and model outputs lie under 8480% in the case of EAC4 data and under 2302% in the case of MERRA-2 data, indicating that the MERRA-2 data better represents the local conditions at the Berlin-Brandenburg airport. The deviations are mainly affected by the stability of the planetary boundary layer, showing the highest discrepancies during well-mixed conditions. The results imply the need to create models in airport proximity that represent currently parametrized micro-scale emission phenomena.

气溶胶影响气候系统、人类健康和机器表面。吸入气溶胶进入飞机发动机会导致结垢、腐蚀和性能下降。本研究评估了用于发动机劣化建模的数据源。为此目的，将大气成分再分析数据与一种常见的模拟和经常出现的气溶胶物种，即疏水性黑碳的原位测量数据进行了比较。2021年10月，在德国柏林-勃兰登堡机场附近，使用无人驾驶航空系统ALADINA（轻型飞机用于探测原位气溶胶的应用）进行的实地活动获得了高分辨率观测结果。将140个疏水性黑碳垂直剖面和气象参数与两个不同的大气成分再分析数据集（欧洲中期天气预报中心大气成分再分析4 （EAC4）和现代研究与应用回顾性分析第2版（MERRA-2））中提取的质量混合比进行了比较。模式输出和大气测量值之间的差异很大。EAC4数据95%的测量值与模型输出的偏差在8480%以下，MERRA-2数据95%的偏差在2302%以下，说明MERRA-2数据更能代表柏林-勃兰登堡机场的当地情况。这些偏差主要受行星边界层稳定性的影响，在混合良好的条件下差异最大。结果表明，需要在机场附近建立代表当前参数化微尺度排放现象的模型。

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引用次数: 0

Validation of satellite formaldehyde products constrained by aircraft observations over the United States during fire seasons 美国火灾季节飞机观测限制的卫星甲醛产品的验证

IF 3.7 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment

Pub Date : 2026-03-01 Epub Date: 2026-01-07 DOI: 10.1016/j.atmosenv.2025.121767

Shuai Sun , Yuzhong Zhang , Song Liu , Lei Shu , Isabelle De Smedt , Lu Hu , Wade Permar , Dirk Richter , Alan Fried , Lei Zhu

Satellite-derived formaldehyde (HCHO) column densities are commonly used to infer regional emissions of non-methane volatile organic compounds (NMVOCs). However, intercomparison and validation of HCHO retrievals from different satellite sensors remain scarce, especially under fire periods. Here, we use observations from FIREX-AQ (Fire Influence on Regional to Global Environments and Air Quality experiment) and WE-CAN (Western Wildfire Experiment for Cloud Chemistry, Aerosol and Nitrogen), two flight campaigns dedicated to investigating smoke plumes during active fire seasons, combined with simulations from the GEOS-Chem to intercompare and validate five HCHO products from four satellites (OMI, OMPS-NPP, OMPS-N20, and TROPOMI). Our analysis suggests that all satellite products consistently capture elevated HCHO signals over the southeastern US and California, but they tend to report lower column values compared to our aircraft-constrained model estimates, with differences ranging from 11.0 % to 56.7 %. Our results imply that while vertical profile shape (reflected in the air mass factor, AMF) plays a role, errors in the slant column retrieval and the treatment of aerosol and cloud scattering effects may be key sources of uncertainty in the satellite HCHO products during fire events. Therefore, future retrieval improvements should prioritize better aerosol and slant column accuracy to reduce biases.

卫星衍生甲醛（HCHO）柱密度通常用于推断非甲烷挥发性有机化合物（NMVOCs）的区域排放量。然而，从不同卫星传感器获取的HCHO的相互比较和验证仍然很少，特别是在火灾期间。在这里，我们使用了FIREX-AQ（火灾对区域到全球环境和空气质量的影响实验）和we - can（西部野火云化学、气溶胶和氮实验）的观测数据，这两个飞行活动致力于调查活火季节的烟羽，结合GEOS-Chem的模拟，对来自四颗卫星（OMI、OMPS-NPP、OMPS-N20和TROPOMI）的五种HCHO产品进行了相互比较和验证。我们的分析表明，所有卫星产品都能持续捕获美国东南部和加利福尼亚上空升高的HCHO信号，但与我们的飞机约束模型估计相比，它们往往报告较低的列值，差异从11.0%到56.7%不等。我们的研究结果表明，虽然垂直剖面形状（反映在气团因子AMF中）起作用，但倾斜柱检索和气溶胶和云散射效应处理的误差可能是火灾期间卫星HCHO产品不确定性的主要来源。因此，未来的检索改进应优先考虑更好的气溶胶和斜柱精度，以减少偏差。

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引用次数: 0