Secondary aerosol formation in winter haze

Author: ktmw

August undefined, 2024

Web15 Jan 2024 · Sun et al. (2016) reported that Secondary Inorganic Aerosols (SIA, NO 3− + SO 42− + NH 4+) are the dominant regional transport pollutants contributing to the formation … Web31 Mar 2024 · The formation mechanism of aerosol sulfate during wintertime haze events in China is still largely unknown. As companions, SO2 and transition metals are mainly …

Evaluation of the influence of El Niño-Southern Oscillation on air ...

Web22 Mar 2024 · Major SOA formation pathways were investigated during haze events by deploying a super-site of trace-gas and aerosol instrumentation in Huairou, northeast of Beijing, from January 1 to 5 March 2016 in the field campaign BEST-ONE (Beijing winter fine particulate Study – Oxidation, Nucleation, and light Extinctions) (Tan et al., 2024) (Section … Web19 Nov 2024 · For secondary inorganic aerosols, this is a new idea to explore this complex environmental problem, by combining PMF3 model and observed AMS dataset (based on … avi aloitusilmoitus

Remote Sensing Free Full-Text Aerosol Optical Properties and …

Web1 Apr 2024 · To better understand the characterization and secondary organic aerosol (SOA) formation of volatile organic compounds (VOCs) during non-haze and haze days, ambient VOCs were continuously measured ... Web23 Feb 2024 · Secondary organic aerosol (SOA) produced by atmospheric oxidation of primary emitted precursors is a major contributor to fine particulate matter (PM 2.5) air … Web1 Aug 2024 · High-time-resolution (3-hour) PM 2.5 samples were collected simultaneously from the rural and urban areas in the Yangtze River Delta region during winter. The aerosol samples were analyzed for carbonaceous components, organic tracers, water-soluble inorganic ions and stable carbon (δ 13 C) and nitrogen (δ 15 N) isotopic compositions of … avial recipe kerala style mia kitchen

Aqueous production of secondary organic aerosol from fossil-fuel ...

Sulfate formation is dominated by manganese-catalyzed

Web22 Jul 2024 · The relative changes in secondary aerosols were larger than those in primary aerosols due to enhanced chemical reactions by aerosol feedback. The feedback-induced absolute change in PM 2.5 concentrations was largest in the haze persistence stage, followed by those in the growth stage and dissipating stage. Webconcentrations of secondary aerosol components, including sulfate, nitrate and secondary organics, in aerosol particles increase sharply, acting as the main contributors to aerosol … lentiiran kirkkoWeb15 Aug 2024 · Eastern China has been facing severe winter haze pollution due mainly to secondary aerosol. Existing studies have suggested that stagnant weather or fast chemical production led to frequent haze in this region. However, few works focus on the linkage between secondary production of sulfate, nitrate, … lenti huke

"Web27 Nov 2024 · However, most air quality models tend to underestimate sulfate formation during severe winter haze episodes in China, because standard SO2 oxidation pathways, including gas-phase chemistry (i.e., oxidized by hydroxyl radical OH) and aqueous-phase chemistry (i.e., oxidized by ozone ( O3) and hydrogen peroxide ( H2O2 )), are suppressed … " - Secondary aerosol formation in winter haze

Secondary aerosol formation in winter haze

Uptake of Water‐soluble Gas‐phase Oxidation Products Drives …

Web7 Apr 2024 · The OC/EC ratios were 7.0, 6.3, 7.6, and 6.9 in spring, summer, autumn and winter, respectively, which demonstrated the abundance of secondary organic aerosols in Nanjing. The sources of carbonaceous aerosol varied significantly with seasons, and were dominated by vehicle exhaust, and coal and biomass burning in PM2.1, and dominated by … Web22 Apr 2024 · This study investigated the sensitivity of nitrate aerosols to vehicular emissions in urban streets using a coupled computational fluid dynamics (CFD)–chemistry model. Nitrate concentrations were highest at the street surface level following NH3 emissions from vehicles, indicating that ammonium nitrate formation occurs under NH3 …

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Web26 Aug 2024 · Hazy weather has occurred frequently in recent years and aroused great concern across the world [1,2,3,4,5].Haze is generally caused by fine atmospheric particulate matter (PM), especially particulates with the aerodynamic diameters of less than 2.5 μm (PM 2.5) [].PM 2.5 can not only cause environmental problems but also enter the alveoli … Web11 Apr 2024 · Xing, L. et al. Wintertime secondary organic aerosol formation in Beijing–Tianjin–Hebei (BTH): contributions of HONO sources and heterogeneous …

Web1 Feb 2024 · We have shown above in Beijing winter haze aerosols that a significant fraction of the missing sulfate based on HR-AMS measurements may be attributed to OSs, which … Web29 Nov 2013 · In January 2013, a long-lasting episode of severe haze occurred in central and eastern China, and it attracted attention from all sectors of society. The process and evolution of haze pollution episodes were observed by the “Forming Mechanism and Control Strategies of Haze in China” group using an intensive aerosol and trace gases campaign …

Web4 Feb 2024 · Secondary aerosol formation embodies the transformation of atmospheric pollutants from the gas to condensed phases (liquid or solid), including photochemical … Web15 Aug 2024 · Eastern China has been facing severe winter haze pollution due mainly to secondary aerosol. To clearly understand the chemical formation and accumulation of …

Web1 Apr 2024 · The concentrations of secondary aerosol components, including sulphate, nitrate, and secondary organics, in aerosol particles increased sharply during heavy haze …

Web11 Jun 2024 · Secondary aerosol formation in winter haze over the Beijing-Tianjin-Hebei Region, China. Frontiers of Environmental Science & Engineering, 15 (2): 13 Article Google Scholar Schuster G L, Dubovik O, Holben B N (2006). Angstrom exponent and bimodal aerosol size distributions. Journal of Geophysical Research-Atmospheres, 111 (D07207D7) aviamentos joinvilleWeb23 Feb 2024 · Aqueous production of secondary organic aerosol from fossil-fuel emissions in winter Beijing haze Secondary organic aerosol (SOA) produced by atmospheric oxidation of primary emitted precursors is a major contributor to fine particulate matter (PM2.5) air pollution worldwide. avia mailWebImpacts of secondary aerosol formation and long range transport on severe haze during the winter of 2024 in the Seoul metropolitan area. Sci. Total Environ., 804 (2024), Article 149984, 10.1016/j.scitotenv.2024.149984. View PDF View article View in Scopus Google Scholar. Kroll et al., 2011. lenti-iii-blank lentivirusWeb19 Nov 2024 · Secondary inorganic aerosol (especially SNA: sulfate, nitrate, and ammonium) formed from different pathways, account for significant proportions of … aviam haute savoieWeb30 Apr 2024 · The occurrence of haze days was 242 days, and winter average concentrations of PM 2.5 were observed over 158.5 μg/m 3 with significant degradation of visibility in 2013 ... Intrinsic factors associated with formation of secondary aerosol and dust propagation from north China to South China exacerbate the complex air pollution in … lentes oakley juliet titaniumWeb18 Oct 2016 · We implemented the online coupled WRF-Chem model to reproduce the 2013 January haze event in North China, and evaluated simulated meteorological and chemical fields using multiple observations. The comparisons suggest that temperature and relative humidity (RH) were simulated well (mean biases are–0.2K and 2.7%, respectively), but … avian 8085Web15 Aug 2024 · Eastern China has been facing severe winter haze pollution due mainly to secondary aerosol. Existing studies have suggested that stagnant weather or fast … avialan