It is the Air District’s job to adopt rules and policies that are fair and equitable to all residents of the Bay Area and to ensure that community-level air pollution problems are not eclipsed by larger-scale policy issues.
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5/16/2012Board of Directors Special Meeting More Information: 5/16/2012 Agenda (442 kb PDF, 8 pgs)
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4/18/2012 Board of Directors Meeting More Information: 4/18/2012 Agenda (4 Mb PDF, 315 pgs)
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The San Francisco Bay Area is characterized by complex terrain consisting of coastal mountain ranges, inland valleys and bays. Elevations of 1500 feet are common in the higher terrain of this area. It can readily be seen that normal wind flow over the area would be radically distorted in the lowest levels. This is particularly true when the airmass is stable and the wind velocity is not strong. With stronger winds and unstable airmasses moving over the area this distortion is reduced. The distortion is greatest when low level inversions are present with the surface air, beneath the inversion, flowing independently of the air above the inversion. This latter condition is very common in the summer, the surface airmass being the sea breeze.