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Loss of Atmosphere from Mars Due to Solar Wind-induced Sputtering

Kass, D. M. and Yung, Y. L. (1995) Loss of Atmosphere from Mars Due to Solar Wind-induced Sputtering. Science, 268 (5211). pp. 697-699. ISSN 0036-8075. doi:10.1126/science.7732377.

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Because Mars does not have a strong intrinsic magnetic field, the atmosphere is eroded by interactions with the solar wind. Early solar-system conditions enhanced the sputtering loss. It is calculated that -3 bars of carbon dioxide (CO_2) have been sputtered over the last 3.5 billion years. This significant increase over the previous estimate by Luhmann et al. of ~0.14 bar of CO_2 is the result of the development of a more complete model. The model also predicts slightly greater loss of water-~80 meters instead of the ~50 meters predicted by Luhmann et al. Because estimates of CO_2 on early Mars range from 0.5 to 5 bars, the 0.14-bar estimate is insignificant but the ~3-bar estimate will have a large effect on our understanding of the planet's evolution.

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Yung, Y. L.0000-0002-4263-2562
Additional Information:© 1995 American Association for the Advancement of Science. 26 July 1994; accepted 1 November 1994. D.K. was supported by an NSF fellowship. This work was supported in part by National Aeronautics and Space Administration grants NAGW-1538 and NAG2-764. We thank J. G. Luhmann and R. E. Johnson for comments and discussions.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
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Issue or Number:5211
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Official Citation:Loss of Atmosphere from Mars Due to Solar Wind-Induced Sputtering D. M. Kass and Y. L. Yung Science, New Series, Vol. 268, No. 5211 (May 5, 1995), pp. 697-699 Published by: American Association for the Advancement of Science Article Stable URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48679
Deposited By: Ruth Sustaita
Deposited On:19 Aug 2014 17:15
Last Modified:10 Nov 2021 18:34

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