3. 6 Warm up Wrap up 7

4. 4, 6 Warm up Wrap up 1,3,7 Greenhouse effect

5. Brainstorming

6. The menu for today 6/26/2013 Greenhouse effect Ozone depletion Global warming Weather patterns changing

7. 78% nitrogen 20.6% oxygen < 1% argon 0.4% water vapor 0.036% carbon dioxide traces gases: Ne, He, Kr, H, O 3 Methane, Nitrous Oxide

8. Greenhouse effect Heat from the planets surface is absorbed by greenhouse gases, and is re-radiated in all directions

10. Selected Greenhouse Gases Carbon Dioxide (CO 2 ) –Source: Fossil fuel burning, deforestation  Anthropogenic increase: 30% i Average atmospheric residence time: 500 years

13. Selected Greenhouse Gases  Methane (CH 4 ) –Source: Rice cultivation, cattle & sheep ranching, decay from landfills, mining  Anthropogenic increase: 145% i Average atmospheric residence time: 7-10 years

14. Selected Greenhouse Gases  Nitrous oxide (N 2 O) –Source: Industry and agriculture (fertilizers)  Anthropogenic increase: 15% i Average atmospheric residence time: 140-190 years

15. Water Vapor Selected Greenhouse Gases

16. 1. Shorter, high Energy wavelengths Hit the earths Surface 2. Incoming energy Is converted to heat

17. 3. Longer, infrared Wavelengths hit Greenhouse gas Molecules in the atmosphere 4. Greenhouse gas Molecules in the Atmosphere emit Infrared radiation Back towards earth

18. Summary Greenhouse gases absorb infrared radiation and prevent it from escaping to space. Carbon dioxide, methane, and nitrous oxide are very good at capturing energy at wavelengths that other compounds miss

19. ozone layer layer in Earth's atmosphere which absorbs most of the Sun's UV radiation

20. Ozone depletion a steady decline of about 4% per decade in the total volume of ozone in Earth's stratosphere (the ozone layer

21. ozone-depleting substances. CFCs, freons, halons refrigerants, propellants (in aerosol applications), and solvents

23. Global warming the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation

24. Who has been paying attention WHY?

25. Greenhouse Effect & Global Warming The “greenhouse effect” & global warming are not the same thing. –Global warming refers to a rise in the temperature of the surface of the earth  An increase in the concentration of greenhouse gases leads to an increase in the magnitude of the greenhouse effect. (Called enhanced greenhouse effect) –This results is global warming

26. Effects of global warming

27. Melting of ice/North and south pole change salt and fresh water variables