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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Size Matters in the Water Uptake and Hygroscopic Growth of Atmospherically Relevant Multicomponent Aerosol Particles
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Size Matters in the Water Uptake and Hygroscopic Growth of Atmospherically Relevant Multicomponent Aerosol Particles

机译:大气相关的多组分气溶胶颗粒的吸水率和吸湿性增长的大小问题

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Understanding the interactions of water with atmospheric aerosols is crucial for determining the size, physical state, reactivity, and climate impacts of this important component of the Earth's atmosphere. Here we show that water uptake and hygroscopic growth of multicomponent, atmospherically relevant particles can be size dependent when comparing 100 nm versus ca. 6 mu m sized particles. It was determined that particles composed of ammonium sulfate with succinic acid and of a mixture of chlorides typical of the marine environment show size-dependent hygroscopic behavior. Microscopic analysis of the distribution of components within the aerosol particles show that the size dependence is due to differences in the mixing state, that is, whether particles are homogeneously mixed or phase separated, for different sized particles. This morphology-dependent hygroscopicity has consequences for heterogeneous atmospheric chemistry as well as aerosol interactions with electromagnetic radiation and clouds.
机译:了解水与大气气溶胶的相互作用对于确定地球大气这一重要组成部分的大小,物理状态,反应性和气候影响至关重要。在这里,我们显示了当比较100 nm与ca时,与大气相关的多组分颗粒的吸水率和吸湿性增长可能与尺寸有关。 6微米大小的颗粒。已确定由硫酸铵和琥珀酸以及典型海洋环境的氯化物混合物组成的颗粒表现出与尺寸有关的吸湿性。气雾剂颗粒内组分分布的微观分析表明,尺寸依赖性是由于混合状态的差异所致,也就是说,对于不同尺寸的颗粒,颗粒是均匀混合还是相分离。这种与形态有关的吸湿性对大气化学的异质性以及与电磁辐射和云的气溶胶相互作用具有影响。

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