Of or relating to the downward flow of cold dense air.
A katabatic wind.
Relating to wind currents that blow down a gradient, especially down the slopes of a mountain or glacier. When air comes in contact with the cool surface of a glacier or the upper regions of a mountain or slope, the air cools, becomes dense, and blows downward. Katabatic winds are usually cool and are especially common at night in polar regions.
Origin of katabatic
Greek katabatikos pertaining to descent from katabatos descending kata- cata- batos going gwā- in Indo-European roots