chapter 15 - Grotzinger Jordan Press Siever Understanding...

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Understanding Earth Chapter 15: THE CLIMATE SYSTEM Grotzinger • Jordan • Press • Siever
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Climate – variably and classically defined as “long-term statistics of weather” – reflects average surface conditions and their variations at a site during cycles of solar “forcing” Climate system – interactions among the shallow Earth “spheres”
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Instrumental records starting only in mid-1800’s (and availability of global data is variable)
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Layers of the Atmosphere (90% of atm O 3 ) Ozone O 3 – good and bad
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Major Ocean Current Systems
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Major Ocean Current Systems – key to current Earth climate regulation
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(shrinking) Sea Ice
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Plant Life Distribution
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Energy Budget of the Earth
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Greenhouse effect Greenhouse gases are increasing: Carbon dioxide (CO 2 ), Methane (CH 4 ) CFC’s, nitrous oxide • Sunlight (energy, visible light) is partially absorbed by the Earth’s surface. That energy is re-emitted from the Earth as infra-red light. This IR light is partially absorbed by atmospheric
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chapter 15 - Grotzinger Jordan Press Siever Understanding...

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