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16 Cards in this Set
- Front
- Back
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What is the IPCC?
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Intergovernmental Panel on Climate Change
They produce global assessments of climate change every 5 to 7 years representing the state of understanding. |
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what is el nino
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the typical warm water in the western pacific ocean stretches over to the eastern pacific ocean, west of south America. Trade winds weakening blowing west across the pacific.
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temperature record since 1880, how much has it gone up?
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about .8 degrees Celsius.
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milankovitch cycles
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procession - like a top. 26,000
obliquity - tilt 41,000 eccentricity - orbit (oval/round) 100,000 |
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9 fingerprints
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1. there is more industrial carbon in the atmosphere.
2. less heat is escaping to space 3. oceans are warming from the top down 4. nights are warming faster than days 5. more heat is returning to earth 6. winter is warming faster than summer 7. the stratosphere is cooling 8. physical models require human greenhouse gas emissions 9. multiple and independent lines of evidence |
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what are some ways we figure out past climate?
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1. deep sea cores
2. carbonate rocks 3. fossils 4. geological deposits 5. dendrochronology |
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how far back do thermometer records go?
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only a few hundred years
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What probably caused the Younger Dryas period?
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glacier lakes (freshwater) melting and running into the North Atlantic reducing salinity and density of the surface and reducing the thermohaline circulation.
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what might have caused The Little Ice Age?
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1. increase in volcanic activity. which are short term cooler.
2. decrease in sun spots. maunder minimum. |
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What is an SRES scenario?
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Special report on emissions scenario. Climate models run against scenarios for future greenhouse gas emissions.
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What are sources of uncertainty in climate model projections?
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clouds and feedback magnitude.
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How much has sea level risen?
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about 20 cm
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Why might sea level rise?
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thermal expansion
glaciers and ice caps Greenland and Antarctica |
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of all the things in the cryosphere, which will add to sea level?
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glaciers and ice sheets. (Greenland and Antarctica)
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What is RCP?
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Representative Concentration Pathways. predicts greenhouse gas concentration, not emission
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Range of temperature predicted by 2100?
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a range of 2.5 degrees Celsius
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