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首页> 外文期刊>Atmospheric Chemistry and Physics Discussions >A single parameter representation of hygroscopic growth and cloud condensation nucleus activity Part 3: Including surfactant partitioning
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A single parameter representation of hygroscopic growth and cloud condensation nucleus activity Part 3: Including surfactant partitioning

机译:吸湿生长和云凝结核活性第3部分的单个参数表示:包括表面活性剂分配

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摘要

Atmospheric particles can serve as cloud condensation nuclei in the atmosphere. The presence of surface active compounds in the particle may affect the critical supersaturation that is required to activate a particle. Modelling surfactants in the context of K?hler theory, however, is difficult because surfactant enrichment at the surface implies that a stable radial concentration gradient must exist in the droplet. In this study, we introduce a hybrid model that accounts for partitioning between the bulk and surface phases in the context of single parameter representations of cloud condensation nucleus activity. The presented formulation incorporates analytical approximations of surfactant partitioning to yield a set of equations that maintain the conceptual and mathematical simplicity of the single parameter framework. The resulting set of equations allows users of the single parameter model to account for surfactant partitioning by applying minor modifications to already existing code.
机译:大气颗粒可以用作大气中的云凝结核。颗粒中的表面活性化合物的存在可能影响激活颗粒所需的临界过饱和。然而,在K的背景下建模表面活性剂是困难的,因为表面上的表面活性剂富集意味着液滴中必须存在稳定的径向浓度梯度。在这项研究中,我们介绍了一个混合模型,其考虑了在云凝结核活动的单个参数表示的上下文中散装和表面阶段之间的分区。呈现的制剂包括表面活性剂分配的分析近似,以产生一组方程,其维持单个参数框架的概念和数学简单性。由此产生的等式集允许单个参数模型的用户通过对已经现有代码应用轻微修改来解释表面活性剂分区。

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