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Quasi-periodic climate changes on Mars - A reviewThe current understanding of the manner in which astronomical variations modulate the Martian climate and thereby lead to the occurrence of laminated polar terrain is considered. The seasonal cycles of dust, carbon dioxide and water, and their responses to astronomical variations, are studied. After an assessment of the way in which these cycles presently operate, for which pertinent spacecraft and ground-based observations are extant, attempts to predict how these cycles may differ under conditions of high and low obliquity and eccentricity are discussed. Attention is given not only to those areas in which there is broad agreement, but also to the controversial and speculative. Key questions include the proportion of dust and water ice in the laminae and its variations within individual layers, the relative importance of older laminae and lower-latitude material as sources of new laminae, and the factors responsible for the youth of the laminated terrain.
Document ID
19820060451
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Pollack, J. B.
(NASA Ames Research Center Moffett Field, CA, United States)
Toon, O. B.
(NASA Ames Research Center Space Sciences Div., Moffett Field, CA, United States)
Date Acquired
August 10, 2013
Publication Date
June 1, 1982
Subject Category
Lunar And Planetary Exploration
Accession Number
82A43986
Distribution Limits
Public
Copyright
Other

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