Abstract

The results of one-dimensional calculations of the height profiles of nucleated sulfate aerosol particles for the northern mid-latitudes and tropics in winter are presented. Numerical calculations were performed using a three-dimensional model of the transport and transformation of multicomponent gas and aerosol substances in the atmosphere, incorporating photochemistry, nucleation involving neutral molecules and ions, as well as condensation/evaporation and coagulation. It is found that the resulting dynamics of the formation of aerosol particle nuclei is not a simple sum of ion and binary (water vapor/sulfuric acid) nucleation rates. This dynamics is determined by the ratio of critical radii of nucleated particles due to binary and ion nucleation of these substances (r_{cr_bin} and r_{cr_ion}) depending on temperature, relative humidity, and ionization rate. This should be taken into account in modeling the gas and aerosol composition of the atmosphere and comparing calculated and observed data.

中文翻译：

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硫酸和水蒸气的二元和离子核在大气中硫酸盐气溶胶形成动力学中的作用

摘要

给出了冬季中北部和北纬地区一维有核硫酸盐气溶胶颗粒高度分布的一维计算结果。使用三维模型对大气中多组分气体和气溶胶物质的传输和转化进行了三维计算，包括光化学，涉及中性分子和离子的成核作用以及冷凝/蒸发和凝聚作用。已经发现，气溶胶颗粒核形成的动力学结果不是离子和二元（水蒸气/硫酸）成核速率的简单总和。这种动力学取决于这些物质的二元和离子成核（r _{cr_bin}和r_{cr_ion}）取决于温度，相对湿度和电离速率。在对大气中的气体和气溶胶成分进行建模以及比较计算和观察到的数据时，应考虑到这一点。