A model of the methane cycle, permafrost, and hydrology of the Siberian continental margin

A two-dimensional model of a sediment column, with Darcy fluid flow, biological and thermal methane production, and permafrost and methane hydrate formation, is subjected to glacial–interglacial cycles in sea level, alternately exposing the continental shelf to the cold atmosphere during glacial times and immersing it in the ocean in interglacial times. The glacial cycles are followed by a” long-tail” 100 kyr warming due to fossil fuel combustion.