Ecological Energetics I_H John-Alder 10Feb2011_4slides

Ecological Energetics I_H John-Alder 10Feb2011_4slides -...

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2/9/2011 1 Henry John-Alder Department of Ecology, Evolution, and Natural Resources 14 College Farm Road, Room 152 henry@aesop.rutgers.edu Phone: 732-932-1064 Second Law of Thermodynamics - Increased Entropy The Second Law of Thermodynamics is commonly known as the Law of Increased Entropy. While quantity remains the same (First Law), the quality of matter/energy deteriorates gradually over time. How so? Usable energy is inevitably used for productivity, growth and repair. In the process, usable energy is converted into unusable energy. Thus, usable energy is irretrievably lost in the form of unusable energy. "Entropy" is defined as a measure of unusable energy within a closed or isolated system (the universe for example). As usable energy decreases and unusable energy increases, "entropy" increases. Entropy is also a gauge of randomness or chaos within a closed system. As usable energy is irretrievably lost, disorganization, randomness and chaos increase. 170 W/m 2 2.7 x 10 24 J/y 342 W/m 2 See http://eosweb.larc.nasa.gov/EDDOCS/radiation_facts.html Solar energy gives rise to Atmospheric currents (see http://rst.gsfc.nasa.gov/Sect14/Sect14_1c.html )
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2/9/2011 2 Solar energy gives rise to the hydrologic cycle
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This note was uploaded on 08/18/2011 for the course ECOLOGY 351 taught by Professor Staff during the Spring '11 term at Rutgers.

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Ecological Energetics I_H John-Alder 10Feb2011_4slides -...

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