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Environmental Studies
EVS 205
James Rotenberg

August 28, 2013 The Day After Tomorrow • Ocean Conveyor Belt (p. 60 Environment) • IPCC Projections for the 21 Century (p. 21 Dire Predictions) o Summer 2013: Level of CO in atmosphere is higher than it’s ever been. 2 • Global Warming Impact Scale (p. 108 Dire) Climate History • The Discovery of Global Warming Time Line by Spender Weart o (1800-1870)  Level of carbon dioxide gas in the atmosphere, as later measured in ancient ice, is about 290 ppm (parts per million)  First Industrial Revolution: Coal, railroads, and land clearing speed up greenhouse gas emission, while better agriculture and sanitation speed up population growth.  1824: Joseph Fourier • Calculates that the Earth would be far colder if it lacked an atmosphere.  1859: John Tyndall • Discovers that some gases block infrared radiation. He suggests that changes in the concentration of the gases could bring climate change. o 1896: Svante Arrehnius  Publishes first calculation of global warming from human emissions of CO 2  Much work focused on the cause of past ice ages. o 1897: Thomas Chamberlin  Produces a model for global carbon exchange including feedbacks.  Hypothesis wa
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