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Composition and Structure of the Martian Upper Atmosphere: Analysis of Results from Viking

McElroy, M. B. and Kong, T. Y. and Yung, Y. L. and Nier, A. O. (1976) Composition and Structure of the Martian Upper Atmosphere: Analysis of Results from Viking. Science, 194 (4271). pp. 1295-1298. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20140909-101158778

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Abstract

Densities for carbon dioxide measured by the upper atmospheric mass spectrometers on Viking 1 and Viking 2 are analyzed to yield height profiles for the temperature of the martian atmosphere between 120 and 200 kilometers. Densities for nitrogen and argon are used to derive vertical profiles for the eddy diffusion coefficient over the same height range. The upper atmosphere of Mars is surprisingly cold with average temperatures for both Viking 1 and Viking 2 of less than 200°K, and there is significant vertical structure. Model calculations are presented and shown to be in good agreement with measured concentrations of carbon monoxide, oxygen, and nitric oxide.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.194.4271.1295 DOIArticle
http://www.sciencemag.org/content/194/4271/1295.abstractPublisherArticle
http://www.jstor.org/stable/1743811JSTORArticle
ORCID:
AuthorORCID
Yung, Y. L.0000-0002-4263-2562
Additional Information:© 1976 American Association for the Advancement of Science. Received 12 November 1976. Work at the University of Minnesota and at Harvard University was supported under NASA contracts NAS-1-9697 and NAS-1-10492, respectively.
Funders:
Funding AgencyGrant Number
NASANAS-1-9697
NASANAS-1-10492
Issue or Number:4271
Record Number:CaltechAUTHORS:20140909-101158778
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140909-101158778
Official Citation:Composition and Structure of the Martian Upper Atmosphere: Analysis of Results from Viking M. B. McElroy, T. Y. Kong, Y. L. Yung and A. O. Nier Science, New Series, Vol. 194, No. 4271 (Dec. 17, 1976), pp. 1295-1298 Published by: American Association for the Advancement of Science Article Stable URL: http://www.jstor.org/stable/1743811
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49492
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Sep 2014 17:28
Last Modified:09 Mar 2020 13:19

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