Secondary aerosol formation in winter haze

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August undefined, 2024

WebComparisons of aerosol composition and sources in different cities or regions are rather limited, yet important for an in-depth understanding of the spatial diversity of aerosol … Web1 Apr 2024 · The concentrations of secondary aerosol components, including sulphate, nitrate, and secondary organics, in aerosol particles increased sharply during heavy haze …

Aqueous production of secondary organic aerosol from …

Web4 Feb 2024 · Secondary aerosol formation embodies the transformation of atmospheric pollutants from the gas to condensed phases (liquid or solid), including photochemical … Web25 Jun 2024 · Figure 4 illustrates that sulfate formation from pNO 3 − can be important under urban winter haze conditions assuming a high rate of nitrate photolysis 35 Zheng et al. 108 implemented this ... how to get rid of rats outside my house

Improving simulations of sulfate aerosols during winter haze over ...

Web23 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. 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 … Web11 Apr 2024 · Xing, L. et al. Wintertime secondary organic aerosol formation in Beijing–Tianjin–Hebei (BTH): contributions of HONO sources and heterogeneous … how to get rid of rats outside naturally

Explosive Secondary Aerosol Formation during Severe Haze in the …

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 … 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 … how to get rid of rats outside your houseWeb15 Feb 2024 · Secondary organic aerosol (SOA) from fossil-fuel combustion is a major component of Beijing winter haze pollution but its formation mechanisms are unclear. It is … how to get rid of rats outside your home

"Web10 Mar 2024 · Measurements have shown that secondary aerosol formation during the haze episodes contributes to the high loading of fine particles (Tie et al., 2024; Huang et al., 2014; Quan et al., 2015; Wen et al., 2015). Amount of studies have demonstrated that air humidity plays a key role in secondary aerosol formation, especially for inorganic species. " - Secondary aerosol formation in winter haze

Secondary aerosol formation in winter haze

ACP - Possible heterogeneous chemistry of …

Web2 Apr 2024 · According to atmospheric modeling and satellite observations, cold fronts can cause trans-regional transport (TRT) of haze particles from the North China Plain (NCP) to … Webconcentrations of secondary aerosol components, including sulfate, nitrate and secondary organics, in aerosol particles increase sharply, acting as the main contributors to aerosol …

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WebComparisons of aerosol composition and sources in different cities or regions are rather limited, yet important for an in-depth understanding of the spatial diversity of aerosol pollution in China. In this study, the data originating from 25 different winter aerosol mass spectrometer (AMS)/aerosol chemical speciation monitor (ACSM) studies were used to … Web18 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 …

WebTo achieve effective control of particle pollution in the BTH region, the precise and complete secondary aerosol formation mechanisms have been investigated, and advances have … Web19 Nov 2024 · Secondary inorganic aerosol (especially SNA: sulfate, nitrate, and ammonium) formed from different pathways, account for significant proportions of …

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) WebImpacts 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 …

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.

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 … how to get rid of rats on your propertyWeb18 Jan 2024 · However, the formation mechanism of haze is still poorly understood owing to the multitude of aerosol sources, their spatio-temporal variability, and coupling of aerosols with atmospheric boundary ... how to get rid of rats on propertyWeb11 Apr 2024 · Xing, L. et al. Wintertime secondary organic aerosol formation in Beijing–Tianjin–Hebei (BTH): contributions of HONO sources and heterogeneous reactions. Atmos. Chem. Phys. 19, 2343–2359 (2024). how to get rid of rats under decking ukWeb19 Dec 2024 · During winter, secondary inorganics constituted a significant fraction apart from organics ∼ (48%–55%), mainly in the form of ammonium nitrate (NH 4 NO 3; up to ∼ [19%–25%] of C-PM 2.5) and ammonium sulfate (NH 4 SO 4; up to ∼ [27%–38%]). how to get rid of rats safelyWeb1 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 … how to get rid of rats naturally in homeWeb16 Jan 2024 · Secondary Aerosol Formation and Influence of Meteorology During Haze Periods In this section, we examine the SOA f ormation pathways and factors responsible … how to get rid of rats under car hoodWeb31 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 … how to get rid of rats organically