Comparison of the ozone formation mechanisms and VOCs apportionment in different ozone pollution episodes in urban Beijing in 2019 and 2020: Insights for ozone pollution control strategies

The Science of The Total Environment, Год журнала: 2023, Номер 908, С. 168332 - 168332

Опубликована: Ноя. 8, 2023

Язык: Английский

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Drivers and impacts of decreasing concentrations of atmospheric volatile organic compounds (VOCs) in Beijing during 2016–2020

The Science of The Total Environment, Год журнала: 2023, Номер 906, С. 167847 - 167847

Опубликована: Окт. 14, 2023

Язык: Английский

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The various synergistic impacts of precursor emission reduction on PM2.5 and O3 in a typical industrial city with complex distributions of emissions

The Science of The Total Environment, Год журнала: 2024, Номер 940, С. 173497 - 173497

Опубликована: Май 31, 2024

Язык: Английский

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Characteristics of ambient air quality and its air quality index (AQI) model in Shanghai, China

The Science of The Total Environment, Год журнала: 2023, Номер 896, С. 165284 - 165284

Опубликована: Июль 3, 2023

Язык: Английский

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A Rapid Computational Method for Quantifying Inter-Regional Air Pollutant Transport Dynamics

Atmosphere, Год журнала: 2025, Номер 16(2), С. 163 - 163

Опубликована: Янв. 31, 2025

A novel atmospheric pollutant transport quantification model (APTQM) has been developed to analyze and quantify cross-regional air pathways fluxes. The integrates high-resolution numerical simulations, Geographic Information System (GIS) capabilities, advanced statistical evaluation metrics with boundary pixel decomposition methods effectively characterize complex dynamics while ensuring computational efficiency. To evaluate its performance, the was applied a representative winter pollution event in Beijing December 2021, using fine particulate matter (PM2.5) as target pollutant. results underscore model’s capability accurately capture spatial temporal variations dispersion, identify major pathways, contributions of inter-regional sources. Cross-validation established reveals strong correlations, further substantiating accuracy. APTQM demonstrates unique strengths resolving dynamic processes within layer, particularly scenarios involving exchanges. However, reliance on simplified chemical framework constrains applicability pollutants significantly influenced by secondary transformations, such ozone nitrate. Consequently, is currently optimized for primary rather than modeling processes. Overall, this study presents reliable computationally efficient tool quantifying transport, offering critical insights support regional quality management policy development.

Язык: Английский

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Exploration of the Reasons for the Decreases in O3 Concentrations in Tai’an City Based on the Control of O3 Precursor Emissions

Atmosphere, Год журнала: 2025, Номер 16(5), С. 505 - 505

Опубликована: Апрель 27, 2025

Due to the “One City, One Policy” for air pollution prevention and control measures, Tai’an City was only city in Shandong Province with a year-on-year decrease O3 concentrations 2022. In this study, WRF-CMAQ model used simulate other inland cities September 2022, evaluation method applied discover differences between cities. During periods of high maximum daily 8 h average (MDA8 O3), overestimated by 3.4% underestimated those −11.0% −2.2%. Dozens simulation scenarios were designed on basis precursor emissions, results indicate that emissions at lower level. On basis, impacts meteorological conditions emission changes quantified. Adverse from led 49.5 µg/m3 increase mean MDA8 during study period. However, local reduction measures Tai’an, some extent, offset these adverse effects, reducing 5.8 µg/m3. summary, might implement effective O3, thereby achieving overall concentrations. This effort secured its leading position Province’s O3–8h-90per ranking

Язык: Английский

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Vertical ozone formation mechanisms resulting from increased oxidation on the mountainside of Mt. Tai, China

PNAS Nexus, Год журнала: 2024, Номер 3(9)

Опубликована: Авг. 22, 2024

Abstract The vertical distribution of ozone (O3) within the boundary layer (BL) and its ground-level effects have been extensively studied. However, observational limitations in obtaining high-resolution, real-time data on O3 precursors, especially volatile organic compounds (VOCs), led to a scarcity research formation sensitivity mechanisms. Online measurements for O3, nitrogen oxides (NOx), VOCs were made mountainside Mount Tai (∼550 m a.s.l.) China during summer 2022 compared with from site. Master Chemical Mechanism (V3.3.1) was used uncover positive correlation between NOx photochemical reaction rates mountainside, marking it as NOx-limited regime contrast VOC-limited identified at surface. On lower NO levels limited hydroxyl radicals (OH) recycling reactions, resulting earlier peaks higher concentrations hydroperoxy (HO2) peroxy (RO2). arrival fresh air masses rich accelerated OH radical cycling, enhanced atmospheric oxidization, significantly impacted surface though transport. Moreover, reduction scenario simulations show that when considering transport, peak production rate is due differences vertically. This study highlights significant BL, underscoring potential impact situ above ground surface-level through exchange, particularly cities mountainous terrain.

Язык: Английский

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Seasonal patterns, vertical profiles, and sensitivity analysis of long-term O3 pollution observations in Hefei City, China

Atmospheric Pollution Research, Год журнала: 2024, Номер 15(7), С. 102145 - 102145

Опубликована: Апрель 4, 2024

Язык: Английский

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Spatial and temporal patterns of drought based on RW-PDSI index on Loess Plateau in the past three decades

Ecological Indicators, Год журнала: 2024, Номер 166, С. 112409 - 112409

Опубликована: Июль 30, 2024

Язык: Английский

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Tropospheric Ozone Concentration in Russia in 2022

Atmospheric and Oceanic Optics, Год журнала: 2023, Номер 36(6), С. 741 - 757

Опубликована: Дек. 1, 2023

Язык: Английский

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