class19-oct7-chap7-bw - Note to class: The following is a...

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• Note to class: The following is a special lecture given by Prof. Britt on October 7 and 9. • It is relevant to sections 1 and 5 of Chapter 7, and you’ll be questioned about it on exams. Orbits and Ice Ages: The History of Climate Dan Britt University of Central Florida Is today's climate NORMAL for the Earth? Over the past 2.7 million years the Earth’s climate has significantly cooled and caused a series of glaciations. Is today's climate NORMAL?
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The climate in the old days (50 million years ago) Warm-adapted vegetation and critters north of the Arctic circle Brown-leaf evergreens Turtles and crocodiles No continental glaciation Tropical conditions to 40 ° Coral growing at the paleolatitude of New York NO HARD Freezes in temperate latitudes. Why so much warmer? CO2 at least 4 times current levels (probably more) Ocean Circulation and Continental locations What is Normal for Sea Level? What is Normal for the Earth?
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This note was uploaded on 11/09/2009 for the course AST 2002 taught by Professor Britt during the Fall '08 term at University of Central Florida.

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class19-oct7-chap7-bw - Note to class: The following is a...

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