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Reducing greenhouses and the temperature history of earth and MarsIt has been suggested that NH3 and other reducing gases were present in the earth's primitive atmosphere, enhancing the global greenhouse effect; data obtained through isotopic archeothermometry support this hypothesis. Computations have been applied to the evolution of surface temperatures on Mars, considering various bolometric albedos and compositions. The results are of interest in the study of Martian sinuous channels which may have been created by aqueous fluvial errosion, and imply that clement conditions may have previously occurred on Mars, and may occur in the future.
Document ID
19770066333
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Sagan, C. (Cornell University Ithaca, N.Y., United States)
Date Acquired
August 9, 2013
Publication Date
September 15, 1977
Publication Information
Publication: Nature
Volume: 269
Subject Category
LUNAR AND PLANETARY EXPLORATION
Distribution Limits
Public
Copyright
Other