SLIDE 1
Greenhouse Gases and Energy Budget
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Overarching questions:
What are greenhouse gases? Where do they come from? How do they work?
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Energy Budget 1 Overarching questions: What are greenhouse gases? - - PowerPoint PPT Presentation
Energy Budget 1 Overarching questions: What are greenhouse gases? - - PowerPoint PPT Presentation
Greenhouse Gases and Energy Budget 1 Overarching questions: What are greenhouse gases? Where do they come from? How do they work? 2 If the amount of energy that comes in to Earth is the same amount of energy that goes out of Earth, how can
SLIDE 2
SLIDE 3
If the amount of energy that comes in to Earth is the same amount of energy that goes out of Earth, how can our planet stay warm?
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SLIDE 4
A greenhouse . . .
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SLIDE 5
What is the greenhouse effect?
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SLIDE 6
Composition of the Earth’s Atmosphere
- Nitrogen N2 = 78 %
- Oxygen O2 = 21 %
- Argon Ar = 0.9 %
- Other = <0.1%
– Carbon Dioxide CO2 – Methane CH4 – Nitrous Oxide NO2 – Ozone O3 – Hydrogen
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SLIDE 7
Greenhouse Gases
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Carbon Dioxide Water Methane Nitrous Oxide Ozone
SLIDE 8
The “Goldilocks” Principle
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Mars is too cold, Venus is too hot, and Earth is just right!
SLIDE 9
What if Earth did not have greenhouse gases?
Main Greenhouse Gases
CO2 and H2O
Estimated temperature without greenhouse gases
- 5 °C (23
°F)
Actual average temperature
15 °C (59 °F)
Temperature change because of greenhouse gases
20 °C (36 °F)
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SLIDE 10
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SLIDE 11
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SLIDE 12
Frequency
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SLIDE 13
More Complete (and complex!) Energy Balance Model
Incoming Solar Radiation = Outgoing Radiation
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SLIDE 14
Energy Budget
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SLIDE 15
Videos
- Bozeman: greenhouse effect ( 8 min)
- Scott Denning: gas resononce ( 6 min)
- The greenhouse effect (6 min)
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