lec21 - Mel Manalis 5 Mel Manalis 6 Laws of thermodynamics...

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1 ES 2 W 09 Lec #21: The Greenhouse Effect Readings: K&B Ch13; M&K p22-25, 34-35, 66-69; SR: McKibben (2007) Carbon’s New Math , & Tierney (2009) Politics in the Guise of Pure Science I. Earth’s energy balance II. Predicted/observed climate trends III. Climate feedback loops IV. Carbon cycle V. Effective climate forcings A. Uncertainies B. Adaptation scenarios
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2 Visible light Infrared Visible Solar Energy Input = Infrared Energy Output Radiation balance: the essential basis of climate Mel Manalis
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3 Intensity (power/area/wavelength) 10 μ m thermal infrared EMR Earth s Energy Balance INPUT = OUTPUT {Reflection of sunshine} solar energy = albedo * + 10 μ m thermal EMR {earth s waste heat} _____________ *Note: Daisy World ; volcanoes; surfaces: clouds, snow, soil, oil & water, etc.
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4 On average, the earth’s surface receives more heat from atmospheric constituents than it does directly from the sun
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Unformatted text preview: Mel Manalis 5 Mel Manalis 6 Laws of thermodynamics In the Real World 1 st Law: Energy (JOULE) is always conserved, i.e. no perpetual motion machines. (Consumption means conversion.) 2 nd Law: Converting energy always produces entropy (JOULE / TEMP) , i.e. disorder or waste. Mel Manalis 7 8 9 Climate feedback loops 10 11 12 Combustion Combustion Land Use Land Use Changes Changes Geological Reservoir Geological Reservoir Global Carbon Cycle Global Carbon Cycle Gas Exchange Between Air and Ocean Gas Exchange Between Air and Ocean Net Accumulation Net Accumulation in Ocean in Ocean Photosynthesis Photosynthesis Respiration Respiration Circulation Circulation From Ginger Armbrust 13 14 Couldnt the increase in atmospheric CO 2 be the result of natural cycles? 15...
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This note was uploaded on 04/02/2009 for the course ENV S 2 taught by Professor Keller during the Winter '09 term at UCSB.

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lec21 - Mel Manalis 5 Mel Manalis 6 Laws of thermodynamics...

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