Mixed aerosol particles as effective ice nucleating systems
Mixed aerosol particles as effective ice nucleating systems
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混合气溶胶颗粒作为有效的冰核系统
DOI：
10.1016/0169-8095(94)90044-2
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发表时间：
1994
影响因子：
5.5
通讯作者：
V. Smorodin
中科院分区：
文献类型：
--
作者：
V. Smorodin
经典成核理论是描述过冷云或雾中混合气溶胶粒子上冰成核过程的一种方法。部分地，基于Fletcher成核理论、Fukuta和Schaller(1981)的结果和溶液理论，考虑了弱可溶混合气溶胶的凝结-冻结机制。建立了天然和人工(碘化银修饰)混合气溶胶高结晶活性的判据。云室实验验证了理论计算的正确性。分析了气溶胶冰核在不同成核过程中的温度活化谱，阐明了弗莱彻活化式的经验常数Na=N0exp(βΔT)的意义。此外，还解释了碘化银晶体的结冰机理，并提出了有关结冰细菌结晶活性的假说。
The classical nucleation theory has been developed as an approach describing ice nucleation processes on mixed aerosol particles in supercooled clouds or fogs. In part, based on the Fletcher's nucleation theory, results of Fukuta and Schaller (1981) and a solution theory, a condensation-freezing mechanism on the weakly soluble mixed aerosols has been considered. Criteria of high crystallizing activity for natural and artificial (modified with silver iodide) mixed aerosols have been established. The theoretical calculations are well verified by cloud chamber experiments. Temperature activation spectra of aerosol ice nuclei for different nucleation processes are analyzed, and the meaning of empirical constants of the Fletcher activation formula,Na=N0exp (βΔT), has been clarified. Also, the ice-forming mechanism of silver iodide crystals is explained and a hypothesis concerning a crystallizing activity of ice forming bacteria is proposed.