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Cards In This Set
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At what atmospheric level does global warming occur?
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Troposphere
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What are the two most important greenhouse gases when discussing global warming?
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Carbon dioxide and water vapor
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What percentage has the atmospheric levels of CO2 risen since 1959 when they were first monitored?
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14%
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Ice core data shows that CO2 levels in the atmosphere have risen by what percentage since 1850?
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20%
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What greenhouse gas has the highest heat trapping effect and why is human addition to this gas not a concern?
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Methane, human contributions are too low to have a major effect.
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Greenhouse gas levels in the troposphere are the highest they have been in the last years?
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160,000
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How does paleoclimatology help us understand greenhouse gas trends over the course of history?
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Ice core data and tree rings can give us insight into the climate and CO2 levels beyond the instrumental records.
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In what ways do humans increase greenhouse gases?
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Fossil fuel combustion, deforestation, and commercial agriculture.
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In what ways do greenhouse gases increase naturally?
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Volcanic eruptions, decomposition of organic matter, and more.
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What percentage of CO2 emissions come from the developed world? What percentage is from the US?
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60% come from the developed world 22% from the US
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What anecdotal evidence supports claims of human onset global warming?
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Ten warmest years on record have all come since 1990's, Arctic temperatures have risen almost twice as fast as the rest of the world's temperatures in the last 50 years, the world's sea levels rose by 4-8 inches.
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Why do you have to be nervous about anecdotal evidence?
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It isn't rigorous scientific data
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What is the IPCC?
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Intergovernmental Panel on Climate Change
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According to the IPCC what is the most likely temperature increase over the next 100 years?
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3.2 degrees C
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In what direction would climate belts shift in the case of a major global warming event?
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Pole-ward
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