Air basin

An '''air basin''' is a geographical region with commonly shared air masses,<ref>{{cite web |title=Sierra Nevada Forest Plan Amendment |url=https://www.fs.usda.gov/emc/nfma/includes/r5/feis/vol_2/part_3.7.pdf |publisher=U.S. Forest Service |access-date=17 February 2025 |page=323}}</ref><ref>{{cite web |title=About the District |url=https://www.avaqmd.ca.gov/about-the-district |website=Antelope Valley Air Quality Management District |access-date=17 February 2025}}</ref> such as an area within a ring or partial ring of mountains, in which winds generally mix and stay, although air does pass in and out of basins.<ref>{{cite web |title=Information on Senate Bill 700 (Florez) |url=https://www.fraqmd.org/information-on-senate-bill-700-florez |website=FRAQMD |publisher=Feather River Air Quality Management District |access-date=17 February 2025 |language=en}}</ref> It describes a land area with generally similar meteorological and geographic conditions throughout.

California is divided geographically into 15 air basins for the purpose of managing the air resources of the State on a regional basis.<ref>{{cite web |title=Maps and Tables of Area Designations for State and National Ambient Air Quality Standards |url=https://ww2.arb.ca.gov/sites/default/files/barcu/regact/2023/sad2023/appc.pdf |website=California Air Resource Board |publisher=State of California |access-date=17 February 2025 |page=C-6}}</ref>

== References == {{reflist}}

{{weather-stub}} Category:Atmospheric circulation