Lecture5_EAS1600_Fall08

Lecture5_EAS1600_Fall08 - EAS 1600 Introduction to...

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Lecture 5 Daisyworld EAS 1600 Introduction to Environmental Sciences In this class we explore a hypothetical world: Daisyworld . This is a simple example of a system with the possibility of both positive and negative feedback.
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Daisyworld was first posited by James Lovelock and colleagues as a way of illustrating how living organisms on an earth-like planet could stabilize the environment without having to engender living organisms with a conscious intention . .. Note: all figures in these notes are taken from: Kump, L.R., J.F. Kasting, R.G. Crane, The Earth System , Prentice Hall, Upper Saddle River, NJ, 351 pp, 1999.
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Background: Cold Sun Paradox/Hot Sun Catastrophe • The solar luminosity (i.e., radiant energy from the sun) has increased over the earth’s history. This raises two questions: Why wasn’t it too cold for life in the earlier epochs of the earth? Why hasn’t the earth heated up over the past few billion years?
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Background: Cold Sun Paradox/Hot Sun Catastrophe
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The Gaia Hypothesis argues that life itself has acted to stabilize the climate. Daisyworld is a simple illustration of how that might work. .. Imagine a planet like the earth that is partially covered in white daisies. .. and daisies are the only form of life.
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Daisyworld as a System • We want to explore the relationship between daisies and the planet’s climate. So let’s represent the planet’s system
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This note was uploaded on 02/08/2011 for the course EAS 1600 taught by Professor Jimstjohn during the Fall '08 term at Georgia Tech.

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Lecture5_EAS1600_Fall08 - EAS 1600 Introduction to...

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