Chemodiversity Mechanisms of Aerosol Acidity: Effects of Seasonal Pattern and Chemical Species DOI
Fei Xie, Xinyue Jiang, L. Li

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2025, Номер 130(10)

Опубликована: Май 24, 2025

Abstract Aerosol acidity has become a prominent focus due to its unclear role in regulating atmospheric chemistry and toxicity, as well the ongoing debate regarding influence of meteorological factors aerosol chemical compositions. In this study, we investigated characteristics PM 2.5 underlying mechanisms. The results showed that exhibited weakly acidic patterns, with bimodal pattern on seasonal scales, primarily high loadings ammonium ions frequent sandstorms. Sensitivity tests indicated temperature had more pronounced effect than relative humidity, owing significant partitioning. Furthermore, responded changes composition, sulfate total (TNH x ) being most contributors, followed by nitrate (TNO 3 chloride (TCl). Sulfate modified preferentially promoting formation bisulfate, which turn regulated partitioning semi‐volatile species. TNO contributed dynamic equilibrium between bisulfate interacting Initially, TNH triggered sharp increase utilizing sulfate; however, subsequent neutralization TNHx species limited further evolutions acidity. comprehensive analysis key suggested reducing pH can only be achieved through effective ammonia control. This study not addresses theoretical gaps numerical simulations ammonia‐rich environments but also enhances our understanding global differential distribution characteristics.

Язык: Английский

Chemodiversity Mechanisms of Aerosol Acidity: Effects of Seasonal Pattern and Chemical Species DOI
Fei Xie, Xinyue Jiang, L. Li

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2025, Номер 130(10)

Опубликована: Май 24, 2025

Abstract Aerosol acidity has become a prominent focus due to its unclear role in regulating atmospheric chemistry and toxicity, as well the ongoing debate regarding influence of meteorological factors aerosol chemical compositions. In this study, we investigated characteristics PM 2.5 underlying mechanisms. The results showed that exhibited weakly acidic patterns, with bimodal pattern on seasonal scales, primarily high loadings ammonium ions frequent sandstorms. Sensitivity tests indicated temperature had more pronounced effect than relative humidity, owing significant partitioning. Furthermore, responded changes composition, sulfate total (TNH x ) being most contributors, followed by nitrate (TNO 3 chloride (TCl). Sulfate modified preferentially promoting formation bisulfate, which turn regulated partitioning semi‐volatile species. TNO contributed dynamic equilibrium between bisulfate interacting Initially, TNH triggered sharp increase utilizing sulfate; however, subsequent neutralization TNHx species limited further evolutions acidity. comprehensive analysis key suggested reducing pH can only be achieved through effective ammonia control. This study not addresses theoretical gaps numerical simulations ammonia‐rich environments but also enhances our understanding global differential distribution characteristics.

Язык: Английский

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