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Chaotic obliquity and the nature of the Martian climateRecent calculations of the Martian obliquity suggests that it varies chaotically on timescales longer than about 10(exp 7) years and varies between about 0 and 60 deg. We examine the seasonal water behavior at obliquities between 40 and 60 deg. Up to several tens of centimeters of water may sublime from the polar caps each year, and possibly move to the equator, where it is more stable. The CO2 frost and CO2-H2O clathrate hydrate are stable in thepolar deposits below a few tens of meters depth, so that the polar cap could contain a significant CO2 reservoir. If CO2 is present, it could be left over from the early history of Mars; also, it could be released into the atmosphere during periods of high obliquity, causing occasional periods of more-clement climate.
Document ID
19950050283
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jakosky, Bruce M.
(Univ. of Colorado, Boulder, CO United States)
Henderson, Bradley G.
(Univ. of Colorado, Boulder, CO United States)
Mellon, Michael T.
(Univ. of Colorado, Boulder, CO United States)
Date Acquired
August 16, 2013
Publication Date
January 25, 1995
Publication Information
Publication: Journal of Geophysical Research
Volume: 100
Issue: E1
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
95A81882
Funding Number(s)
CONTRACT_GRANT: NAGW-2286
Distribution Limits
Public
Copyright
Other

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