The Structure of the Upper Atmosphere of Mars: In Situ Accelerometer Measurements from Mars Global Surveyor

Author:

Keating G. M.12345,Bougher S. W.12345,Zurek R. W.12345,Tolson R. H.12345,Cancro G. J.12345,Noll S. N.12345,Parker J. S.12345,Schellenberg T. J.12345,Shane R. W.12345,Wilkerson B. L.12345,Murphy J. R.12345,Hollingsworth J. L.12345,Haberle R. M.12345,Joshi M.12345,Pearl J. C.12345,Conrath B. J.12345,Smith M. D.12345,Clancy R. T.12345,Blanchard R. C.12345,Wilmoth R. G.12345,Rault D. F.12345,Martin T. Z.12345,Lyons D. T.12345,Esposito P. B.12345,Johnston M. D.12345,Whetzel C. W.12345,Justus C. G.12345,Babicke J. M.12345

Affiliation:

1. G. M. Keating, R. H. Tolson, G. J. Cancro, S. N. Noll, J. S. Parker, T. J. Schellenberg, R. W. Shane, B. L. Wilkerson, The George Washington University at NASA Langley, MS 269, Hampton, VA 23681, USA.

2. S. W. Bougher and J. M. Babicke, University of Arizona, Tucson, AZ 85721, USA.

3. R. W. Zurek, T. Z. Martin, D. T. Lyons, P. B. Esposito, M. D. Johnston, C. W. Whetzel, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

4. J. R. Murphy, J. L. Hollingsworth, R. M. Haberle, M. Joshi, NASA Ames Research Center, Moffett Field, CA 94035, USA.

5. J. C. Pearl, B. J. Conrath, M. D. Smith, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

Abstract

The Mars Global Surveyor (MGS) z -axis accelerometer has obtained over 200 vertical structures of thermospheric density, temperature, and pressure, ranging from 110 to 170 kilometers, compared to only three previous such vertical structures. In November 1997, a regional dust storm in the Southern Hemisphere triggered an unexpectedly large thermospheric response at mid-northern latitudes, increasing the altitude of thermospheric pressure surfaces there by as much as 8 kilometers and indicating a strong global thermospheric response to a regional dust storm. Throughout the MGS mission, thermospheric density bulges have been detected on opposite sides of the planet near 90°E and 90°W, in the vicinity of maximum terrain heights. This wave 2 pattern may be caused by topographically-forced planetary waves propagating up from the lower atmosphere.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference42 articles.

1. C. A. Barth et al. in Mars H. H. Kieffer B. M. Jakosky C. W. Snyder M. S. Matthews Eds. (Univ. of Arizona Press Tucson 1992) pp 1054–1089.

2. S. W. Bougher D. M. Hunten R. G. Roble J. Geophys. Res. Planets 99 14609 (1994).

3. R. W. Zurek et al. in Mars H. H. Kieffer B. M. Jakosky C. W. Snyder M. S. Matthews Eds. (Univ. of Arizona Press Tucson 1992) pp 835–933.

4. R. Kahn et al. in Mars H. H. Kieffer B. M. Jakosky C. W. Snyder M. S. Matthews Eds. (Univ. of Arizona Press Tucson 1992) pp 1017–1053;

5. Martin L. J., Zurek R. W., J. Geophys. Res. 97, 3221 (1993) .

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