13-3 Climate Change Page 339. Picture it…….. Have you ever sat in a car…….. ……….on a...
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Transcript of 13-3 Climate Change Page 339. Picture it…….. Have you ever sat in a car…….. ……….on a...
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13-3 Climate Change
Page 339
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Picture it……..
• Have you ever sat in a car……..• ……….on a hot day…….• ……..like todaaaaayyyyy….. 8{• Windows are up, heat is trapped….• And you feel like you are suffocating??????
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This guy has!
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A. The Greenhouse Effect
• 1. Solar radiation (suns rays) enter atmosphere as high-energy light.
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A. The Greenhouse Effect
• 2. Some of the suns warm energy is absorbed and re-radiated to the earth, while some escapes to space.
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A. The Greenhouse Effect
• 3. The rest of the energy is absorbed by gases in the troposphere causing a greenhouse effect.
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A. The Greenhouse Effect
• 4. Greenhouse gases absorb and radiate infrared radiation from the sun.
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A. The Greenhouse Effect
• 5. Major greenhouse gases include water vapor and carbon dioxide (the highest amount) and methane and nitrous oxide.
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Brainstorm
• Think about the greenhouse gases.• How are we negatively impacting the greenhouse effect?
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B. Carbon Dioxide Levels
• 1. Plants photosynthesize in the summer, which causes less CO2 in the atmosphere.
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B. Carbon Dioxide Levels
• 2. During winter, plants die off and there is more CO2 in the atmosphere.
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B. Carbon Dioxide Levels
• 3. CO2 levels have increased 20% in less than 50 years.
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B. Carbon Dioxide Levels
• 4. By analyzing ice cores, scientists show that CO2 levels are the highest they have been for the last 420, 000 years!
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http://www.youtube.com/watch?v=oHzADl-XID8
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C. Global Climate Change
• 1. Global warming is the gradual increase of the average temperature of the earths surface.
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C. Global Climate Change
• 2. The rise in temperature is correlated to the rise in greenhouse gases.
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Matching!
• A. Carbon Dioxide, CO2• B. Methane, CH4• C. Nitrous Oxide, N2O• D. Water Vapor, H2O
• 1. Evaporation, plant transpiration
• 2. Animal Waste, Livestock, Sewage, etc.
• 3. Burning of Fossil Fuels and deforestation
• 4. Burning of Fossil Fuels, biomass burning, and deforestation
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D. Consequences of a Warmer Earth
• 1. Rising sea levels– Warm water expands– Ice glaciers are melting– Higher chance of floods
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D. Consequences of a Warmer Earth
• 2. Global Weather Patterns– Oceans absorb more heat, increasing intensity of
typhoons and hurricanes
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D. Consequences of a Warmer Earth
• 3. Human Related Problems– Heat stroke cases increase– Mosquitoes, vector for disease, move to warmer
areas
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E. Recent Findings
• 1. Global temperature has increased 0.74° C, higher at northern latitudes
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E. Recent Findings
• 2. Sea level continues to rise.
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E. Recent Findings
• 3. Greenhouse gases are increasing due to human activity.
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E. Recent Findings
• 4. 1990s: Kyoto Protocol was a global treaty designed to reduce greenhouse gas emissions.
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E. Recent Findings
• 5. Many countries have ratifies the treaty; except for countries most responsible, including the U.S.