What is the composition and structure of the Earth's atmosphere?  Why is
it as warm as it is, and how did it form?  These are the questions for
today's lecture.  The Earth's atmosphere is a complex, dynamic, and
evolving system.  We will discuss the composition and structure of the
atomsphere, the nature of the different thermal layers, the Greenhouse
Effect, and the Primordial Atmosphere and atmospheric evolution.  This
will give us a basis for comparison when we begin to examine other
planetary atmospheres in future lectures.  Recorded 2006 Nov 1 in 100
Stillman Hall on the Columbus campus of The Ohio State University.

Lecture 29: The Earth's Atmosphere

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