Hygroscopic behavior and aerosol chemistry of atmospheric particles containing organic acids and inorganic salts

IF 8.5 1区 地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES
Fang Tan, Hongbin Zhang, Kaihui Xia, Bo Jing, Xiaohong Li, Shengrui Tong, Maofa Ge
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Abstract

Aerosol hygroscopic behavior plays a central role in determining climate effects and environmental influence of atmospheric particulates. Water-soluble organic acids (WSOAs) constitute a significant fraction of organic aerosols. These organic acids have a complex impact on aerosol hygroscopicity due to their physical and chemical interactions with atmospheric inorganic salts. The mixing of WSOAs with inorganic salts exerts a multiple influence on the hygroscopic growth and phase behaviors of aerosol particles, largely depending on the composition ratio, acid properties, particle size and interactions between particle components. The WSOAs play a critical role in determining water uptake characteristics of aerosol particles, especially in the low and moderate RH ranges. The previous studies reveal the occurrence of aerosol chemistry related to chloride/nitrate/ammonium depletions in aerosol droplets containing WSOAs and inorganic salts. The potential influence of WSOAs on the atmospheric recycling of HCl/HNO3/NH3 due to the chloride/nitrate/ammonium depletion may contribute to the atmospheric budget of reactive gases. A fundamental understanding for the hygroscopic behavior and aerosol chemistry of inorganic–WSOA systems is essential for the accurate parameterization of aerosol behaviors in atmospheric models. However, there is still lack of a comprehensive understanding of the hygroscopicity and related aerosol chemistry of internally mixed inorganic–WSOA systems. The present review comprehensively summarizes the impacts of WSOAs on hygroscopicity and phase changes of atmospherically relevant inorganic salts in aerosol particles especially under subsaturated conditions, and overviews the recent advances on aerosol chemistry related to the hygroscopic process for the internally mixed inorganic–WSOA aerosols.

Abstract Image

Abstract Image

含有有机酸和无机盐的大气颗粒的吸湿行为和气溶胶化学性质
气溶胶的吸湿行为在决定大气颗粒物的气候效应和环境影响方面起着核心作用。水溶性有机酸(WSOAs)在有机气溶胶中占很大比例。这些有机酸与大气中的无机盐发生物理和化学作用,对气溶胶的吸湿性产生了复杂的影响。WSOAs 与无机盐的混合会对气溶胶颗粒的吸湿性增长和相行为产生多重影响,这主要取决于成分比例、酸特性、颗粒大小以及颗粒成分之间的相互作用。WSOAs 在决定气溶胶粒子的吸水特性方面起着至关重要的作用,尤其是在低相对湿度和中等相对湿度范围内。以往的研究表明,在含有硫酸根离子和无机盐的气溶胶液滴中,会出现与氯/硝/铵消耗有关的气溶胶化学现象。由于氯化物/硝酸盐/铵的耗竭,硫酸亚铁对大气中 HCl/HNO3/NH3 循环的潜在影响可能有助于大气中活性气体的预算。从根本上了解无机-WSOA 系统的吸湿行为和气溶胶化学性质对于大气模型中气溶胶行为的精确参数化至关重要。然而,目前对内部混合的无机-WSOA 系统的吸湿性和相关气溶胶化学还缺乏全面的了解。本综述全面总结了 WSOA 对吸湿性和气溶胶颗粒中与大气相关的无机盐相变的影响,尤其是在亚饱和状态下的影响,并概述了与内部混合无机-WSOA 气溶胶吸湿过程相关的气溶胶化学的最新进展。
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来源期刊
npj Climate and Atmospheric Science
npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science
CiteScore
8.80
自引率
3.30%
发文量
87
审稿时长
21 weeks
期刊介绍: npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.
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