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On the possible effects of water-soluble organic aerosol constituents on cloud formation

机译：关于水溶性有机气溶胶成分对云形成的可能影响

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摘要

The role of organic compounds in cloud formation (and thereby in indirect aerosol forcing)has received particular attention in the past few years.It has been shown that in addition to inorganic salts organic aerosol particles can also act as cloud condensation nuclei.However,while the inorganic content of the fine aerosol is dominated by a few ionic species,the carbonaceous matter is composed of thousands of organic compounds the majority of which are unknown.Our knowledge on the water-soluble organic aerosol constituents is even more limited due to the methodological difficulties in their analysis.On the other hand,these compounds seem to play an important role in cloud formation.Kohler theory,which was originally developed to describe the activation of an aerosol particle consisting of a water-soluble inorganic salt,is also used to evaluate the role of organic constituents.However,the complexity of the internally mixed aerosol particles (containing both organic and inorganic constituents)raises serious problems in the elucidation of the properties of a nucleating cloud droplet.Contradictory experimental results revealed that the outcome of the model calculation was extremely sensitive to input parameters such as the chemical composition of the aerosol,the properties of the organic components (e.g.molecular weight,van't Hoff factor)and the properties of the growing droplet (e.g.surface tension,osmotic coefficient)which are influenced by both organic and inorganic constituents.
机译：在过去的几年中，有机化合物在云形成中的作用（从而间接引起气溶胶的强迫作用）受到了特别的关注。研究表明，除了无机盐以外，有机气溶胶颗粒还可以充当云的凝结核。细小气溶胶的无机含量主要由少数离子组成，碳质物质由数千种有机化合物组成，其中大多数是未知的。由于方法学原因，我们对水溶性有机气溶胶成分的了解更加有限。另一方面，这些化合物似乎在云的形成中起着重要作用。最初用于描述由水溶性无机盐组成的气溶胶颗粒的活化作用的科勒理论也用于评估有机成分的作用。但是，内部混合的气溶胶颗粒（包含有机和无机成分）的复杂性矛盾）实验结果表明，模型计算的结果对输入参数极为敏感，例如气溶胶的化学成分，有机成分的特性（例如，分子量，无霍夫系数）以及生长液滴的特性（例如表面张力，渗透系数）受有机和无机成分的影响。

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