Meteorology

Freezing Level

Definition

The altitude in the atmosphere where the temperature first drops to 0 degrees Celsius. Important for icing risk assessment: structural icing occurs when flying through visible moisture at or above the freezing level.

Related Terms

Icing

The accumulation of ice on aircraft surfaces when flying through visible moistur...

Temperature Lapse Rate

The rate at which air temperature decreases with altitude. The standard lapse ra...

Pilot Report(PIREP)

A weather observation made by a pilot during flight, reporting actual conditions...

Test your knowledge

Think you understand Freezing Level? Challenge yourself with practice questions covering meteorology and all other ATPL subjects.

Start a Practice Quiz

Or browse all questions by subject