Natural Climate Change - Detection

Natural Climate Change - Detection - CO 2 , CH 4...

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Detecting Climate Change Landforms Annual Growth Rings Pollen Ocean Cores Ice Cores
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Landforms
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Landforms 23,000 years ago 18,000 years ago
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Tree Rings
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Detecting Climate Change Landforms Annual Growth Rings Pollen Ocean Cores Ice Cores
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Coral Rings
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Coral Rings
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Pollen
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Present Potential Vegetation
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Vegetation 18,000 years ago
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Pollen animation
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Source: http://classes.aces.uiuc.edu/NRES416/Images/US_soils_mapl.gif Paleosols animation
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Paleosols
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Paleosols
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Ice cores
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Ice cores: Oxygen isotopes (more 18 O in ice indicates warmer global T)
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Unformatted text preview: CO 2 , CH 4 concentrations Ice cores: Oxygen isotopes (more 18 O in ice warmer global temp.) CO2 , CH4 concentrations Volcanic deposits Ocean cores: Oxygen isotopes (more 18 O in shells glacial advance) Maximum of most recent glaciation: 20,000 years ago 5-6C cooler global temperature Maximum of most recent glaciation: 20,000 years ago 5-6C cooler global temperature Sea level 120 meters lower http://www.discoverysoftware.co.uk/GallerySeaLevel.htm Aguado and Burt, Figure 16-3 Global ice volume less ice more ice Younger Dryas Paleogeography with ice sheets...
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Natural Climate Change - Detection - CO 2 , CH 4...

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