GEOL150_week12_lecture1_EarlyModeling

GEOL150_week12_lecture1_EarlyModeling - Week 12, lecture 1...

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GEOLl50: Climate Change University of Southern California, Los Angeles Week 12, lecture 1 Climate Models, Part I
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Why are climate models necessary? e Climate system is a complex system : made up of many components, interacting in non-trivial (“non- linear”) ways. Its behavior is unfathomable to the human mind alone
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Before climate models: early pioneers (1) 1824: Joseph Fourier frst to realize CO 2 is a “greenhouse” gas (likens Earth to box with glass cover) 1859 : Tyndall confrms experimentally
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Before climate models: early pioneers (2) 1896: Swedish scientist Svante Arrhenius made frst global warming calculation
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The Discovery of Global Warming NYT, 1938 NYT, 1976 NYT, 1979 http://www.nytimes.com/interactive/2009/12/07/science/20091207_CLIMATE_TIMELINE.html Models?
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What’s in a model ? A model is a simplifed, though internally consistent representation oF reality. Scaled model Numerical model A climate model incorporates physical laws, initial and boundary conditions, in order to describe the realistic evolution oF climate.
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How to tell a computer to make circles? Simple: tell it it’s made of squares
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GEOL150_week12_lecture1_EarlyModeling - Week 12, lecture 1...

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