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Lecture Outlines Natural Disasters, 7th edition

Climate Change Natural Disasters, 7th edition, Chapter 12. Early Earth Climate An Intense Greenhouse. Inner planets atmospheric compositions:Venus:Intense solar radiation, trapped by dense CO2-rich atmosphere ? surface temperatures 477oCMars:Less solar energy, but thin atmosphere is rich in

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Lecture Outlines Natural Disasters, 7th edition

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    1. Lecture Outlines Natural Disasters, 7th edition Patrick L. Abbott

    61. Global Climate Models Climate change involves complex questions and many variables Questions are addressed by constructing global climate models (GCMs)

    64. Ice Melting and Sea-Level Rise Glacial ice holds 2.15% of water on earth If all melted, sea level would rise 65 m (210 ft) This will not happen in foreseeable future However, there are regions of concern Arctic sea ice decreased by 7.4% per decade, may be gone by 2030 Possible tipping point Greenland continental glacier melting has increased, large-scale catastrophic collapses are possible Possible tipping point A sea level rise of 4-6 m in upcoming centuries would cause major problems worldwide for major cities and low-lying deltas

    67. Mitigation Options Widely perceived need to reduce greenhouse gas emissions Will require changing energy-usage technologies Cap-and-trade Emission allowances are placed on companies Companies can by or sell credits Drastic Engineering Imitate volcanoes, giant shades, create clouds over oceans Efforts may create bigger problems than they solve

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