NASA simulation portrays ozone intrusions from aloft

Outdoor enthusiasts in Colorado's Front Range are occasionally rewarded with remarkable visibility brought about by dry, clear air and wind. But it's what people in the mountainous U.S. West can't see in conditions like this -- ozone plunging down to the ground from high in the stratosphere, the second layer of the atmosphere -- that has attracted the interest of scientists, university scientists and air quality managers.
For the full article: http://www.sciencedaily.com/releases/2014/04/140411091941.htm