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The Mars water cycle at other epochs - Recent history of the polar caps and layered terrainA numerical model is presented of the integrated role of seasonal water cycle on the evolution of polar deposits on Mars over the last 10 million years. From the model, it is concluded that the only major difference between the polar caps which affects their long-term behavior is ultimately the difference in their elevations. Because of that difference, there is a preference for CO2 frost to stay longer on the northern polar cap. The average difference in sublimation at the caps results in a net south-to-north transport of water ice over long time scales. Superimposed on any long-term behavior is a transfer of water ice between the caps on the 10 exp 5 - 10 exp 6 yr time scales. The amount of water exchanged is small compared to the total ice content of the polar deposits.
Document ID
19930051807
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jakosky, Bruce M. (NASA Headquarters Washington, DC United States)
Henderson, Bradley G. (NASA Headquarters Washington, DC United States)
Mellon, Michael T. (Colorado Univ. Boulder, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1993
Publication Information
Publication: Icarus
Volume: 102
Issue: 2
ISSN: 0019-1035
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NAGW-2286
Distribution Limits
Public
Copyright
Other