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Mars atmosphere during the Mariner 9 Extended Mission - Television results.The Extended Mission of Mariner 9 provided data from 23 revolutions and recorded seasonal changes in the atmosphere of Mars during northern spring and early summer. The visibility of the surface was exceptional, indicating atmospheric clarity greater than that previously observed by Mariner 9 or by Mariner 6 and 7. Cloud systems were observed over both polar regions and indicated westerly winds in the -45 to -65 deg latitude zone (southern winter) and easterly winds in the vicinity of +75 deg (northern summer). The puzzling brightening phenomena that recur seasonally and diurnally over Tharsis, Amazonis, and Nix Olympica were seen to be clouds of a generally diffuse character but with some indications of convective activity. These clouds show a remarkable degree of topographic control, and their large-scale patterns are closely duplicated from day to day.
Document ID
19730052416
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Leovy, C. B.
(Washington, University Seattle, Wash., United States)
Briggs, G. A.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Smith, B. A.
(New Mexico State University Las Cruces, N. Mex., United States)
Date Acquired
August 7, 2013
Publication Date
July 10, 1973
Publication Information
Publication: Journal of Geophysical Research
Volume: 78
Subject Category
Space Sciences
Accession Number
73A37218
Distribution Limits
Public
Copyright
Other

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