Overflights

Crossings in geocryology ( permafrost ) - thin frozen strata that exist for more than one year. Overflights are formed as a result of an increase in the depth of seasonal freezing of soils, which is not accompanied by a corresponding increase in seasonal thawing. In other words, layers of frozen soil that “flew” before the next winter. With the onset of warming and the usual seasonal freezing of layers, the excess of heat rotations at positive temperatures over heat rotations at negative temperatures, the overflow disappears.

The difference between a migratory flight and a short-term existing permafrost is that the latter occurs periodically as a result of regular changes in heat transfer, and migrations appear as a result of partial cooling, caused by local or regional changes in heat transfer.

Crossings are widespread at the southern border of permafrost. To calculate the possibility of formation of overflights depending on various natural and anthropogenic factors, the concept of potential seasonal freezing of rocks is widely used ^[1] .