Air hole and Atmospheric phenomenon

Air hole noun - A local region of low pressure or descending air that causes a plane to lose height suddenly.

Atmospheric phenomenon and air hole are semantically related. In some cases you can use "Atmospheric phenomenon" instead a noun phrase "Air hole".

Atmospheric phenomenon noun - A physical phenomenon associated with the atmosphere.

Air hole and atmospheric phenomenon are semantically related. Sometimes you can replace phrase "Air hole" with "Atmospheric phenomenon", this phrases are similar.