Absorption of CO 2 , CH 4 and N 2 O molecules by water clusters has been investigated by the molecular dynamics method. The frequency spectra of dielectric permittivity for systems consisting of (H 2 O) n , (CO 2 ) i (H 2 O) 10 , (CH 4 ) i (H 2 O) 10 and the (N 2 O) i (H 2 O) 10 clusters have been defined. The calculation and analysis of IR radiation absorption spectra for these systems have been carried out. The analysis of inharmoniousness of phonon oscillations allows an explanation of the origin of characteristic frequencies appearing in the IR spectra. The influence of cluster compositions on the reflection coefficient of transverse electromagnetic wave from the cluster surface was considered. The capture of greenhouse gas molecules by an ultra disperse aqueous medium reduces the ability of the medium to absorb the Earth's radiation and thus reduces the greenhouse effect.

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The method of molecular dynamics is used to investigate the stability and physical properties of (CH 4 ) i (H 2 O) n clusters. The possibility of methane molecules being absorbed by clusters containing ten and twenty water molecules is demonstrated. Such clusters retain the thermodynamic stability when the number of CH 4 molecules they absorbed does not exceed six. The frequency dispersion of complex permittivity of (CH 4 ) i (H 2 O) n aggregates reflects the resonant behavior of polarizability depending on the applied electric field. The dependence of the absorption coefficient α on the frequency of infrared radiation varies significantly after even one CH 4 molecule is absorbed by water clusters. The maximal value of α for water aggregates which absorbed CH 4 molecules is much lower than the respective value for pure water clusters of appropriate size.

The method of molecular dynamics is used to investigate the process of absorption of N 2 O and CH 4 molecules by water clusters and to determine the frequency spectra of permittivity for systems consisting of clusters mixed in different ratios, namely, (. 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.

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