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The paper presents some results of the development of a digital permanently operating structural and geological model (implemented at the Autonomous Institution of the Khanty-Mansiysk Autonomous District-Yugra V.I. Shpilman Research and Analytical Center for the Rational Use of the Subsoil) for the area of central West Siberia and important aspects that need to be considered in implementation practice. The methodological challenges of the variational-grid mapping method and its application include problems such as finding an optimal computational grid and using heterogeneous input information for mapping key seismic horizons. An effective method is considered for using seismic data with uncorrected misties in geological mapping based on corrections for derivatives of the desired function along the seismic profile direction (i.e., seismic surface shape). Special attention is paid to a priori information when mapping stratigraphic boundaries with poorly correlated seismic sections. The conformal thickness model linking geometry of the mapped surface with the structural framework of the two reference boundaries has been tested on the construction of regional structural and geological models for the Jurassic interval of the cross section of West Siberia. The model modification can also be applied to mapping clinoform formations. Given the scale and non trivial tasks of regional mapping, the issues related to setting up the computing workflow are considered in detail: algorithmization, programming protocols, and automation. In the light of the accentuated relevance of the development of specialized software, the GST (Geo-Spline Technology) software product is considered, with the digital structural framework of the region implemented therein. This resulted in a permanently operating model, since the hierarchical object-oriented approach implemented in GST ensures a complete protocol that integrates computational procedures and data flows, as well as automation of model recalculation. The structural framework serves as the basis for mapping physical properties and parameters, assessment of the region resource potential, and study of other aspects. The proposed model being not conclusive, it offers rich opportunities for revision and refinement as to the area size (geological model domain), level of detail, database enlargement, thereby determining the directions of further development of the digital structural framework.

The magnetotelluric sounding (MTS) method implemented on drifting ice floes in the Arctic is suitable for detection of 3D inhomogeneities in crustal conductivity while recording the transverse magnetic (TM) mode potential of the electromagnetic field. High-conductivity layers of seawater and sediments shield the underlying 3D inhomogeneity. Their presence virtually does not affect changes in the standard responses of the medium used in MTS but is quite noticeable in the characteristics of the TM mode. To register them, one can use a circular electric dipole (CED) located at the surface of an ice floe. During the drift, the electric field can be measured on the ice floe using electrodes in seawater. We propose to lower the magnetic sensors beneath the ice, in seawater, because ice deformations interfere with the magnetic-field component measurements. The coordinates of the observation station during MT soundings on the ice floe in the Arctic (similar to earlier observations at North Pole stations) can change significantly. In order to take into account the effect of horizontal movements of the drifting station, we propose to complement all the recorded time series with the coordinates of measurement points. We developed a technique for processing such data to take into account nonplane-wave effects, which can occur in the Arctic because of the proximity of ionospheric current jets. We carry out the synchronization of all observations in the investigated area, using a model of spatial and temporal field variations and data accumulation. To test our approach, we use the synthetic experimental data for the model that considers the existence of seawater, sediment, resistive crust, crustal object, and the underlying mantle. We determine the crustal 3D object parameters with account of the TM-mode potential distributions at the seawater surface restored from the synthetic experimental data obtained at the drifting station during the drift. We use the Nelder-Mead method for optimization of the object characteristics. The parameters of the object become highly similar to their test values if the trajectory of the drifting station passes through an object, covering it most fully.

The possibility of determining the orientation of H₂O molecules adsorbed on the surface of SiO₂ airgel nanopores is studied. The interaction energy of a free H₂O molecule with H₂O molecules adsorbed on the surface of a nanopore are quantum-chemical calculated for the cases of their chaotic and ordered orientations. Experimental data on the broadening of the vibrational-rotational absorption lines of H₂O in airgel nanopores are analyzed. It is shown that the experimental data correspond to the model of orderly oriented H₂O molecules on the surface of nanopores.

The H₂O absorption lines broadened by the carbon dioxide pressure were recorded using IFS 125 HR Fourier spectrometer in the spectral region of 3760-4160 cm^-1. The values of the broadening and shift coefficients of the H₂O absorption lines are determined for the Voigt profile and the modified Voigt profile which takes into account the dependence of the broadening on the speed of the colliding molecules. The parameters of the H₂O absorption lines obtained in the work allow more accurate determination of the H₂O concentration in the carbon dioxide atmospheres of the planets, as well as more accurate calculation of these parameters for other spectral regions.

Results of calculating the spectrum of phosphorus monoxide (PO) fluorescence bands are presented. It is shown that the use of excitation radiation with wavelengths near the bandheads of the ( P₂₂ + Q₁₂) and P₁₂ branches of the A²Σ⁺ ( v ′ = 0) - X²Π_3/2 ( v ″ = 0) band provides a spectral separation of the γ (0, 1) PO fluorescence band and the vibrational-rotational Raman spectrum of oxygen. The spectra of the γ (0, 1) fluorescence band of PO fragments of dimethylmethylphosphonate and the vibrational-rotational band of spontaneous Raman scattering on atmospheric oxygen molecules were experimentally obtained under exposure to KrF-laser radiation at a wavelength of 247.78 nm. It is shown that the results of calculations of the shape and position of the fluorescence spectra are in good agreement with the experimental data.

The absorption spectrum of ¹³CH₄ in the range from 9000 to 9200 cm^-1 is studied using a Bruker IFS-125M Fourier spectrometer at temperatures from 208 to 296 K. The lines of the R-branch of the 3ν₃¹³CH₄ band are identified up to the rotational quantum number J = 11. The list of identified lines includes nine previously unknown lines with high rotational quantum numbers. For the first time, 32 levels of the state (0030) of the ¹³CH₄ molecule were interpreted according to the symmetry types ( А₁, А₂, F₁, F₂, E ) up to J = 10.

New data are presented on the dependence of the function of the refractive index of soot particles on their average size in the visible and near-IR spectral regions found by the method of laser-induced incandescence. The sunlight absorption by soot aerosols is currently calculated with a value of the refractive index function of about 0.2 at a wavelength of 550 nm regardless of the origin of soot particles and their variability. The new data confirm the dependence of the optical properties of soot on the size of particles and conditions of their formation, which is related to the degree of their graphitization. It is shown that the solar radiation absorption by soot aerosol can double as compared to the commonly accepted values if taking into account the particle size distribution.

Statistical parameters are presented for the concentrations of heavy metals of the first, second, and fourth hazard classes in dust samples. The correlation analysis of the concentrations of some heavy metals is carried out. The interannual variations in the concentrations of Co, As, Ni, Pb, Zn, Cu, Fe₂O₃, V, MnO, Cr, TiO₂, and Sr in samples of atmospheric aerosol in south-central part of Tajikistan are studied. The air mass motion trajectories are constructed according to the HYSPLIT model, which correspond to transport of the pollutants.

The study shows a possibility of practical application of remote sensing data for digital marking and determination of the areas with a high content of suspended matter in sea coastal waters. Using the example of the region at the southwestern coast of Crimea, the relationship between seasonal and domestic winds and cases of increased suspended matter content is shown based on data of high- and medium-resolution optical satellite sensors in 2017-2019. The contribution of continental runoff depends on season; it is weaker compared to the action of the wind. The approach suggested can be useful for prompt mapping of the dynamics of suspended matter based on satellite observations from several sources.

The impact of suspended particles in the urban air on the health of different groups of the population of Tomsk, Russia, is studied. It is shown that women are generally most susceptible to the adverse effects of aerosol air pollution and extreme (high summer and low winter) air temperatures. Women at age of 65-74 are the most vulnerable to the environment hazards. The age-and-sex matched analysis of mortality allows us to determined groups of population (age, causes of death) the most sensitive to high aerosol concentrations and extreme air temperatures: women at age of 65-74, cancer of the digestive system, breast cancer, and acute myocardial infarction; women at age 34-50, undetermined causes; women at age 75-87, breast-pang; men at age 53-65, other forms of coronary artery disease; men at age 78+, male reproductive organ cancer. It is shown that the general mortality of the population is mainly due factors not studied in this work. However, the risk of the negative impact of air pollution is significant for the selected groups of population in the region under study.