GEOL150_week11_lecture2_GlobalWarming

GEOL150_week11_lecture2_GlobalWarming - GEOLl50: Climate...

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Unformatted text preview: GEOLl50: Climate Change University of Southern California, Los Angeles Week 11, lecture 2 The Climate of Man Climate in the Human Era The Anthropocene Are we overdue for an Ice Age? Evidence for global warming in the Industrial Era From multiple independent lines of evidence Possible Causes Is it fair to call these changes man-made? The Oddball Termination Both carbone dioxide and methane behaved very unusually in this deglaciation, compared to the past 4. Last Deglaciation The Anthropocene Rice paddies began in Asia ~7000 ka, right before the rise in CH 4 e spread of agriculture over the past 10,000 years led to large-scale deforestation, which may explain rise in CO 2 Is glaciation overdue? e current orbital configuration would tend to favor ice sheet growth, not decay ere are unresolved problems with a human explanation of this oddball glacial termination, but the problems are even bigger to explain it by natural causes Recent rise in CO 2 and CH 4 appears responsible for the lack of this glacial inception Working Group I Contribution to the IPCC Fifth Assessment Report The Physical Science Basis: Latest Findings to be Assessed by WGI in AR5 Warming in the climate system is unequivocal......
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GEOL150_week11_lecture2_GlobalWarming - GEOLl50: Climate...

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