English French German Spain Italian Dutch Russian Portuguese Japanese Korean Arabic Chinese Simplified

Friday, May 2, 2008

Sky Watch Friday # 8 Perlemorskyer


Polar stratospheric clouds (PSCs), also known as nacreous clouds, are clouds in the winter polar stratosphere at altitudes of 15,000–25,000 metres (50,000–80,000 ft). They are implicated in the formation of ozone holes, their effects on ozone depletion arise because they support chemical reactions that produce active chlorine which catalyzes ozone destruction, and also because they remove gaseous nitric acid, perturbing nitrogen and chlorine cycles in a way which increases ozone destruction.





For more Sky Watch photos, visit Wigger’s World.

No comments:

Post a Comment