Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgre..108.5078w&link_type=abstract
Journal of Geophysical Research Planets, Volume 108, Issue E7, pp. 14-1, CiteID 5078, DOI 10.1029/2003JE002078
Physics
7
Ionosphere: Planetary Ionospheres (5435, 5729, 6026, 6027, 6028), Meteorology And Atmospheric Dynamics: Waves And Tides, Planetology: Solar System Objects: Mars
Scientific paper
Seven hundred and forty three Martian ionospheric electron density altitude profiles, obtained by the radio occultation experiment onboard Mars Global Surveyor, have been analyzed for the purpose of determining possible spatial density fluctuations. In about 80% of these profiles the high altitude region, above ~145 km, displays significant wavelike structures with spatial scales of tens kilometers. These structures appear as spatial wave activity superposed on background electron density distributions that decrease exponentially with altitude. The amplitudes of the density variations are mostly limited to be less than +/-50% of the background densities. Spectrum analysis is applied to the ionospheric profiles above 145 km, and it is found that a ``spatial wavelength'' of ~40 km is prevailing in the observations. It is demonstrated that the observed fluctuations are consistent with the occurrence of local density fluctuations. The prevailing scale of the wavelike structure agrees very well with the wavelength of hydrodynamic waves predicted by Wang and Nielsen [2002a, 2002b, 2003b]. If hydrodynamic waves is indeed the cause of these electron density fluctuations, then the ~145 km altitude should be considered the lowest altitude at which the effects of external dynamic disturbances of the Martian ionosphere can reach, and should therefore be considered the lower boundary of the topside ionosphere.
Nielsen Edward
Wang Jian-Sheng
No associations
LandOfFree
Wavelike structures in the Martian topside ionosphere observed by Mars Global Surveyor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Wavelike structures in the Martian topside ionosphere observed by Mars Global Surveyor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavelike structures in the Martian topside ionosphere observed by Mars Global Surveyor will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1148209