Forced waves in the martian atmosphere from MGS TES nadir data

D. Banfield, B. J. Conrath, M. D. Smith, Philip Christensen, R. John Wilson

Research output: Contribution to journalArticle

84 Citations (Scopus)

Abstract

We have analyzed the temperature retrievals from Mars Global Surveyor (MGS) Thermal Emission Spectrometer (TES) nadir spectra to yield latitude-height resolved maps of various atmospheric forced wave modes as a function of season for a full Mars year. Among the isolated wave modes is the zonal mean, time mean temperature, which we used to derive zonal mean zonal winds and stationary wave quasi-geostrophic indices of refraction, diagnostic of their propagation. The diurnal Kelvin wave was isolated in the data, with results roughly consistent with models (Wilson and Hamilton, 1996, J. Atmos. Sci. 33, 1290-1326). The s = 1 and s = 2 stationary waves were found to have significant amplitude in ducts extending up the winter polar jets, while the s = 3 stationary wave was found to be confined to near the surface. The s = 1 stationary wave was found to have little phase tilt with height during northern winter, but significant westward phase tilt with height in the southern winter. This indicates that the wave carries heat poleward, slightly more than that found in Barnes et al. (1996; J. Geophys. Res. 101, 12,753-12,776). The s = 1 stationary wave is likely the dominant mechanism for eddy meridional heat transport for the southern winter. We noted that the phase of the s = 2 stationary wave is nearly constant with time, but that the s = 1 stationary wave moved 90° of longitude from fall to winter and back in spring in the North. While interannual variability is not yet addressed, overall, these results provide the first comprehensive benchmark for forced waves in Mars's atmosphere against which future atmospheric models of Mars can be compared.

Original languageEnglish (US)
Pages (from-to)319-345
Number of pages27
JournalIcarus
Volume161
Issue number2
DOIs
StatePublished - Feb 1 2003

Fingerprint

Mars Global Surveyor
Martian atmosphere
standing wave
nadir
thermal emission
Mars
spectrometer
spectrometers
atmospheres
winter
tilt
mars
Kelvin wave
wind wave
zonal wind
refraction
Mars atmosphere
Kelvin waves
eddy
heat

Keywords

  • Atmospheres
  • Mars, atmosphere
  • Meteorology
  • Structure
  • Tides, atmospheric

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Banfield, D., Conrath, B. J., Smith, M. D., Christensen, P., & Wilson, R. J. (2003). Forced waves in the martian atmosphere from MGS TES nadir data. Icarus, 161(2), 319-345. https://doi.org/10.1016/S0019-1035(02)00044-1

Forced waves in the martian atmosphere from MGS TES nadir data. / Banfield, D.; Conrath, B. J.; Smith, M. D.; Christensen, Philip; Wilson, R. John.

In: Icarus, Vol. 161, No. 2, 01.02.2003, p. 319-345.

Research output: Contribution to journalArticle

Banfield, D, Conrath, BJ, Smith, MD, Christensen, P & Wilson, RJ 2003, 'Forced waves in the martian atmosphere from MGS TES nadir data', Icarus, vol. 161, no. 2, pp. 319-345. https://doi.org/10.1016/S0019-1035(02)00044-1
Banfield, D. ; Conrath, B. J. ; Smith, M. D. ; Christensen, Philip ; Wilson, R. John. / Forced waves in the martian atmosphere from MGS TES nadir data. In: Icarus. 2003 ; Vol. 161, No. 2. pp. 319-345.
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