Patterns of Degradation of Hydrate-Bearing Permafrost: Modeling Considering the Osmotic Effect
M.M. Ramazanov1,2, N.S. Bulgakova1,3, L.I. Lobkovsky4
1Institute of Geothermal and Renewable Energy Problems - Branch of the Joint Institute for High Temperatures RAS, Makhachkala, Russia
2M.A. Sadovsky Institute of Geosphere Dynamics RAS, Moscow, Russia
3Dagestan State University of National Economy, Makhachkala, Russia
4P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia
Keywords: permafrost, gas hydrates, ice melting, degradation, solutions, osmosis, mathematical model
Abstract
Based on a formulated mathematical model, numerical experiments were carried out to study the degradation of permafrost containing ice, accumulations of metastable preserved gas hydrates, and free gas under thermal and saline effects of solutions, taking into account the osmotic effect. Multivariate calculations were used to investigate the patterns and rates of permafrost degradation and methane release. A comparison of some model results with corresponding experimental data showed good agreement.
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