ABSTRACT
Important information about the thermal state and regime of submarine permafrost in the Soviet Arctic has been gathered by E. N. Molochushkin, Molochushkin and R. I. Gavriliev, L. Zhigarev and I. R. Plakht, and Danilov and Zhigarev. According to data given by N. F. Grigoriev, 9.0 m. According to Molochushkin, in the area of Muostakh Island the sum of the bottom layer of seawater's positive temperatures for a multi-year period exceeds that of the negative temperatures by 33-273 degree-days. Areas of the Laptev Sea shelf in which the seawater has a negative mean annual temperature are suitable for submarine permafrost. Molochushkin gives some maps showing that in the areas of seawater with a mean annual temperature of -0.8°C, the thickness of the submarine permafrost is about 50-60 m; those with a seawater temperature of -1.3°C are about 90-100 m. Are writes that thermal abrasion is important in the formation of thick layers of submarine permafrost.
