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Unformatted text preview: o 41,000-year cycle • Croll also predicted the impact of feedback mechanism o Albedo: reflectance of light • Plate tectonics o Movement of continents with respect to poles o Formation and erosion of mountain ranges • Ca-rich minerals eroded as mountains uplifted. Ca washed to ocean • Marine organisms combine Ca with CO2 to form shells. • Remove CO2 from atmosphere o Interruption of large-scale weather patterns • Change in atmosphere o Large igneous provinces: SO2, dust, CO2 • Green house gases o H2O (water vapor) naturally occuring o CO2 (carbon dioxide) naturally occurring/ human activitied o CH4 (methane)naturally occurring/human activated o NiO2 (nitrous oxide) o CFC’s (chlorofluorocarbons) o HFC’s (halofluorocompounds) o PFC’s (perfluorcarbons)...
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- Spring '08
- Climate Change, directions Climate change, 41,000-year cycle Croll