Nitrogen Dioxide Source Attribution for Urban and Regional Background Locations Across Germany

Atmosphere, Journal Year: 2025, Volume and Issue: 16(3), P. 312 - 312

Published: March 9, 2025

It is important to understand the sources causing exposure nitrogen dioxide. Previous studies on dioxide (NO2) source attribution have largely focused local urban scales. This study aims assess contributions NO2 levels at regional and background locations in Germany. For this purpose, we used chemistry-transport model LOTOS-EUROS. Road transport was identified as largest contributor, particularly settings (up 59% major cities), with larger shares from light-duty vehicles than heavy-duty vehicles. Modelled traffic highways exceed those roads background. also highlights shipping, agriculture, energy, industry, which vary significantly region region. Transboundary play a role, near border. The performance has been validated by comparison ground-based observations federal state networks Federal Environmental Agency. showed an underestimation of concentrations cities, hinting shortcomings spatial allocation emissions. observed difference between Berlin rural large sensitivity ambient temperature, not reproduced model. These results indicate that way emissions are described, including temperature influence, needs be updated.

Language: Английский

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The long-term impact of biogenic volatile organic compound emissions on urban ozone patterns over central Europe: contributions from urban and rural vegetation

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(23), P. 13541 - 13569

Published: Dec. 10, 2024

Abstract. The paper evaluates the long-term (2007–2016) impact of biogenic volatile organic compound (BVOC) emissions on urban ozone patterns over central Europe, specifically focusing contribution vegetation using a regional climate model coupled offline to chemistry transport model. BVOCs are emitted by terrestrial ecosystems, and their is considered especially important NOx-rich environments such as areas. study BVOC (O3), formaldehyde (HCHO), hydroxyl radical (OH) near-surface concentrations, showing an increase in summer 6 %–10 % large areas Europe due emissions. It also demonstrates substantial concentrations. Additionally, concentrations shows decrease most modeled region 20 %–60 %, with some increases Impacts peroxy radicals (HO2 higher RO2) shown too. Importantly, explores partial role modulating its overall formation all findings reveal that contribute around 10 total areas, indicating significant but localized influence. conducts sensitivity analyses assess uncertainty arising from calculation fraction results show responds magnitude nearly linearly, variations up 4-fold, emphasizing importance accurately quantifying fluxes. Overall, sheds light intricate relationship between vegetation, emissions, atmospheric chemistry, providing valuable insights into causes pollution.

Language: Английский

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Multiphase Reactions of Hydrocarbons Into an Air Quality Model With CAMx‐UNIPAR: Impacts of Humidity and NO_x on Secondary Organic Aerosol Formation in the Southern USA

Journal of Advances in Modeling Earth Systems, Journal Year: 2024, Volume and Issue: 16(10)

Published: Oct. 1, 2024

Abstract Secondary organic aerosol (SOA) mass in the Southern USA during winter‐spring 2022 was simulated by integrating Comprehensive Air quality Model with extensions (CAMx) UNIfied Partitioning‐Aerosol phase Reaction (UNIPAR) model, which predicts SOA formation via multiphase reactions of hydrocarbons. UNIPAR streamlines partitioning oxygenated products and their heterogeneous using explicitly predicted originating from 10 aromatics, 3 biogenics, linear/branched alkanes (C9‐C24). simulations were compared those Organic Aerosol Partitioning (SOAP) uses simple surrogate for each precursor. Both SOAP showed similar tendencies but slightly underpredicted against observations at given five ground sites. However, compositions sensitivity to environmental variables (sunlight, humidity, NO x , SO 2 ) different between two models. In CAMx‐UNIPAR, originated predominantly alkanes, terpenes, isoprene, influenced showing high concentrations wet‐inorganic salts, accelerated aqueous reactive products. positively correlated biogenic because elevated levels nitrate radicals hygroscopic effectively oxidized hydrocarbons night promoted growth chemistry, respectively. Anthropogenic SOA, formed mainly daytime oxidation OH radicals, weakly negatively cities. acidity (neutral vs. acidic cation/anion = 0.62) dominated isoprene SOA. The reduction emissions could mitigate burdens where are abundant.

Language: Английский

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"Environmental, Health and Economic Benefits of Emission Reduction in Residential Sector – a case study for Poland"

Atmospheric Pollution Research, Journal Year: 2024, Volume and Issue: unknown, P. 102360 - 102360

Published: Nov. 1, 2024

Language: Английский

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