A computer study of the absorption of infrared radiation by systems of molecular clusters

The method of molecular dynamics is used to investigate the process of absorption of $\mathrm{N}_2\mathrm{O}$ and $\mathrm{CH}_4$ molecules by water clusters and to determine the frequency spectra of permittivity for systems consisting of clusters mixed in different ratios, namely, $(\mathrm{H}_2\mathrm{O})_n$, $(\mathrm{N}_2\mathrm{O})_i(\mathrm{H}_2\mathrm{O})_{10}$, and $(\mathrm{CH}_4)_i(\mathrm{H}_2\mathrm{O})_{10}$. IR-radiation absorption spectra for these systems are calculated and analyzed; the radiation power scattered by these systems and the tangent of dielectric loss angle are determined. The inclusion of anharmonicity of phonon oscillation makes it possible to explain the origin of characteristic frequencies appearing in IR spectra of mixtures of cluster systems. The capture of molecules of greenhouse gases by an ultradisperse aqueous medium affects the ability of this medium to absorb terrestrial radiation, i.e., reduces the greenhouse effect.