Effect of cryogenic metamorphization processes of pore solutions on predictive assessments of saline permafrost temperature state, by the example of the Yamal peninsula

Abstract

The work is devoted to improving the methodology for prediction of the saline permafrost temperature state, taking into account cryogenic metamorphization of pore solutions. The problem has been solved for three regions of the Yamal peninsula. Mathematical and thermodynamic modeling of temperature fields was carried out taking into account the changing of the water-ion composition of pore solutions during the freezing. It is shown that failure to take into account the processes of cryogenic metamorphization leads to an error in predictive assessments of the mean annual permafrost temperature of up to 30 %.