Atmosphere Structur1

Atmosphere Structur1 - Atmosphere Structure Both Mars and...

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Atmosphere Structure Both Mars and Venus have tropospheres of greater extent than the Earth, though for different reasons. Mars' atmosphere is much thinner than Earth's and there is less compression because of Mars' weaker gravity. Although Venus has weaker gravity than Earth, it has over ninety times the amount of atmosphere because of a runaway greenhouse effect that occurred at least hundreds of millions of years ago. That will be described further later but it does provide a warning to us that drastic global climate change is possible. Because their tropospheres extend over a greater distance than the Earth's troposphere, Mars' and Venus' clouds are found at higher altitudes. Mars and Venus also have thermospheres. What is missing is the temperature bump of a stratosphere (and mesophere) because they do not have an ozone layer to absorb the ultraviolet light. (Planet atmosphere models courtesy of Jere Justus at the Marshall Space Flight Center, NASA .) The jovian planets have the same atmosphere layers as the Earth, though, their compositions, of
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Atmosphere Structur1 - Atmosphere Structure Both Mars and...

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