2. DAILY REVIEW #9 29. What happens in the Arctic Ocean that drives the thermohaline circulation? 30. Why is the thermohaline circulation important to climate? 31. Describe what changes during an El Nino cycle. 32. What are the 3 main greenhouse gases? 33. Describe one way that each of the greenhouse gases changes naturally. End

3. CO 2 CHANGES… Varies throughout the yearyear Natural causes… Human causes… Varies over time Highest level in 800,000 yrs. 40% increase since Industrial Age

4. METHANE CHANGES… Varies Natural causes Human causes Highest level in 650,000 years 148% increase since Industrial Age

5. EFFECTS OF CLIMATE CHANGE TODAY… IPCC conclusions Last 100 years Current change is not “normal” Human emissions likely dominant cause of change 1.1 o F global average increase Continued emission rate of GHG will cause: Further warming Long-lasting changes to all parts of the climate Severe effects globally

6. DAILY REVIEW #10 34. What has happened to carbon dioxide and methane levels in the atmosphere since the Industrial Age? 35. List at least 5 things humans do that change climate. 36. What effect has already been seen on the climate? 37. Brainstorm at least 5 different things that can happen because of what you described in #36. End

7. CLIMATE CHANGE EFFECTS …TEMPERATURE Already documented increase Projection 2-11 o F in next 100 How can we change that?

8. …WEATHER More variable weather Due to: Higher temp. More “fuel” for weather Effects and their effects Agriculture Wildfires Extreme rain/snow Dust storms

9. …SEA LEVEL Historically Currently 4-8 in. last 100 yrs. Double the rate in last 20 yrs. Causes Melting glaciers and ice caps Thermal expansion Effects Predictions (by 2100)by 2100 2.5-6.5 ft. Extreme = 23ft.

12. …MELTING What has happened? Land vs. sea ice Examples Effect on sea levels Predictions Effects Sea levels Albedo decrease Decreased salinity Change thermohaline circulation

13. EFFECTS OF CLIMATE CHANGE Research and choose 1 effect climate change has on our world. 1. Get your choice checked off by me (1 st come first served!) 2. Research further A.How does climate change impact this area? B.How will human society be changed due to this impact? C.What (if anything) can we do now so that this impact is less dramatic? 3. Post your findings on Padlet