Journal articles
Global distribution and parameter dependences of gravity wave activity in the Martian upper thermosphere derived from MAVEN/NGIMS observations
Naoki Terada
1
François Leblanc
2
Hiromu Nakagawa
1
Alexander S. Medvedev
3, 4
Erdal Yiğit
5, 4
Takeshi Kuroda
6, 1
Takuya Hara
7
Scott L. England
7
Hitoshi Fujiwara
8
Kaori Terada
1
Kanako Seki
9, 10
Paul R. Mahaffy
11
Meredith Elrod
12, 11
Mehdi Benna
11, 12
Joseph Grebowsky
11
Bruce M. Jakosky
13
Naoki Terada 1
Mail :
Author
François Leblanc 2
Mail :
Author IdHAL : francois-leblanc69 ORCID : https://orcid.org/0000-0002-5548-3519
Hiromu Nakagawa 1
Author
Alexander S. Medvedev 3, 4
Author
Meredith Elrod 12, 11
Author
Mehdi Benna 11, 12
Author
Joseph Grebowsky 11
Author
Bruce M. Jakosky 13
Author
1
Graduate School of Information Sciences [Sendai] (Aramaki aza Aoba 6-3-09, Aoba-ku Sendai-city Miyagi-pref.
980-8579 - Japan)
- Tohoku University [Sendai] (2-1-1 Katahira, Aoba-ku, Sendai, 980-8577 Japan - Japan)
2
HEPPI - LATMOS (France)
- LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- UPMC - Université Pierre et Marie Curie - Paris 6 : UMR8190 (4 place Jussieu - 75005 Paris - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8190 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8190 (France)
3
MPS - Max-Planck-Institut für Sonnensystemforschung (Göttingen, Allemagne - Germany)
- Max-Planck-Gesellschaft (Jägerstrasse, 10-11, D-10117 Berlin - Germany)
4
Institut für Astrophysik [Göttingen] (Friedrich-Hund-Platz 1
37077 Göttingen - Germany)
- Georg-August-University [Göttingen] (Wilhelmsplatz 1, 37073 Göttingen - Germany)
5
Department of Physics and Astronomy [Fairfax] (4400 University Drive MS 3F3, Fairfax,VA - United States)
- George Mason University [Fairfax] (4400 University Drive, Fairfax, Virginia 22030 - United States)
6
NICT - National Institute of Information and Communications Technology (4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795 Japan - Japan)
7
SSL - Space Sciences Laboratory [Berkeley] (7 Gauss Way, Berkeley, CA 94720 - United States)
- University of California [Berkeley] (Berkeley, CA - United States)
- University of California (United States)
8
Faculty of Science and Technology [Tokyo] (Japan)
- Seikei University (3-3-1 Kichijoji-Kitamachi, Musashino-shi, Tokyo 180-8633, Japan - Japan)
9
Department of Earth and Planetary Science [Tokyo] (Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 - Japan)
- The University of Tokyo (7 Chome-3-1 Hongo, Bunkyo, Tokyo 113-8654, Japon - Japan)
10
Graduate School of Science [Tokyo] (Japan)
- The University of Tokyo (7 Chome-3-1 Hongo, Bunkyo, Tokyo 113-8654, Japon - Japan)
11
GSFC - NASA Goddard Space Flight Center (Greenbelt, MD 20771 - United States)
12
CRESST - Center for Research and Exploration in Space Science and Technology [GSFC] (GSFC, Greenbelt, MD 20771 - United States)
- GSFC - NASA Goddard Space Flight Center (Greenbelt, MD 20771 - United States)
13
LASP - Laboratory for Atmospheric and Space Physics [Boulder] (1234 Innovation Drive, Boulder, CO 80303-7814 - United States)
- University of Colorado [Boulder] (Boulder, Colorado 80309 - United States)
Abstract : Wavelike perturbations in the Martian upper thermosphere observed by the Neutral Gas Ion Mass Spectrometer (NGIMS) onboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft have been analyzed. The amplitudes of small-scale perturbations with apparent wavelengths between ~100 and ~500 km in the Ar density around the exobase show a clear dependence on temperature (T0) of the upper thermosphere. The average amplitude of the perturbations is ~10% on the dayside and ~20% on the nightside, which is about 2 and 10 times larger than those observed in the Venusian upper thermosphere and in the low-latitude region of Earth's upper thermosphere, respectively. The amplitudes are inversely proportional to T0, suggesting saturation due to convective instability in the Martian upper thermosphere. After removing the dependence on T0, dependences of the average amplitude on the geographic latitude and longitude and solar wind parameters are found to be not larger than a few percent. These results suggest that the amplitudes of small-scale perturbations are mainly determined by convective breaking/saturation in the upper thermosphere on Mars, unlike those on Venus and Earth.
Document type :
Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-01492717
Contributor : Catherine Cardon <>
Submitted on : Monday, March 20, 2017 - 3:02:58 PM
Last modification on : Friday, January 10, 2020 - 3:42:33 PM
Contributor : Catherine Cardon <>
Submitted on : Monday, March 20, 2017 - 3:02:58 PM
Last modification on : Friday, January 10, 2020 - 3:42:33 PM
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- HAL Id : insu-01492717, version 1
- DOI : 10.1002/2016JA023476
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INSU | CNRS | LATMOS | UPMC | UVSQ | UNIV-PARIS-SACLAY | SORBONNE-UNIVERSITE | SU-SCIENCES
Citation
Naoki Terada, François Leblanc, Hiromu Nakagawa, Alexander S. Medvedev, Erdal Yiğit, et al.. Global distribution and parameter dependences of gravity wave activity in the Martian upper thermosphere derived from MAVEN/NGIMS observations. Journal of Geophysical Research Space Physics, American Geophysical Union/Wiley, 2017, 122 (2), pp.2374-2397. ⟨10.1002/2016JA023476⟩. ⟨insu-01492717⟩
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