An air basin is an area within a ring or partial ring of
mountain
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited Summit (topography), summit area, and ...
s that in the absence of winds holds air and
smog within the area.
External links
* http://encyclopedia2.thefreedictionary.com/Air+Basin
References
{{weather-stub
Atmospheric circulation