Ozone O 3
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
OzoneO3
The Ozone Layer
absorbs most of UV light from
sun in stratosphere.
How ozone is formed
UV or lightning splits an oxygen (O2) - these join
other O2 to form O3
Ozone Eaters1. CFCs (Chlorofluorocarbons): CClF3
coolants in refrig. & a.c.
Breaking apart CFCs
takes 10-20 yrs for CFC molecules to reach stratosphere
Breaking apart CFCs1 Cl atom can destroy 100,000 ozone molecules!
The Ozone Holeozone thinning
over Antarctica
Sept 2006
Sept 2007
Dec 2007
Solar Radiation Types1. UV-A – milding irritating2. UV-B – most harmful to
organisms3. UV-C – deadly ; does not
reach Earth’s surface
Effects of Ozone Thinning
1. More UV light passes through, damaging DNA, causing mutations, skin cancer, cataracts.
Effects of Ozone Thinning
2. UV-B – kill some species of plants and microbes
-Limiting factor for coral communities
-Reduced productivity of aquatic ecosystems
Effects of Ozone Thinning
Related Documents
