frost line
freezing depth
frost depth

Bizarre and ancient life forms in the freezing depths of the world's deepest lake.

We dance into the Atlantic breakers, willing warmth out of their freezing depths.

And even here, once night falls, the temperature drops to such freezing depths that none of your people could possibly survive."

They morph seals to escape them, but are attacked by orcas in the freezing depths.

The freezing depths stole her breath.

He rolled away, swearing a litany as he hauled his soaked leg from the freezing depths.

It overwinters in terrestrial habitat, using old burrows or cavities created by rotting roots, below the freezing depth.

In the next instant, I was pulled down into the freezing depths of the underground lake, and I let out almost all of my breath with shock.

Alternatively, in Arctic and Antarctic locations the freezing depth is so deep that it becomes year-round permafrost, and the term "thaw depth" is used instead.

It is purely by chance that the inflatable raft landed face up, rather than face down, in the freezing depths of this ocean, in the nether region of a whale.

In August 2012 Russia's state-owned nuclear corporation, Rosatom, signed a contract to begin construction on what will be the world's largest nuclear icebreaker, a "universal" vessel that could navigate both shallower rivers and the freezing depths of the Arctic.

During his first winter back in Zurich, Max had donned a wetsuit, broken the ice on Schloss Kappel's lake and dived obsessively into its freezing depths, believing that if he went deep enough he could somehow turn back time and save his mother.