منابع مشابه
Mars: upper atmosphere.
The thermal structure of the upper atmosphere of Mars has been theoretically investigated. The exospheric temperature, for a pure CO(2) model atmosphere, lies between 400 degrees and 700 degrees K. The origin of the Martian atmosphere is discussed in the light of these results.
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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, increas...
متن کاملMariner 6: ultraviolet spectrum of Mars upper atmosphere.
Emission features from ionized carbon dioxide and carbon monoxide were measured in the 1900- to 4300-angstrom spectral region. The Lyman alpha 1216-angstrom line of atomic hydrogen and the 1304-, 1356-, and 2972-angstrom lines of atomic oxygen were observed.
متن کاملMars Global Surveyor and Mars Odyssey Accelerometer observations of the Martian upper atmosphere during aerobraking
[1] Mars Global Surveyor and Mars Odyssey accelerometer measurements of martian upper atmospheric densities reveal the large-scale and small-scale structure of the thermosphere in unprecedented detail. Meridional density gradients, which are seasonally dependent, are greater on the dayside than the nightside, indicating stronger meridional winds on the dayside. Density scale heights do not vary...
متن کاملSemiannual Oscillations in the Atmosphere of Mars
We report on the first detection of the semiannual oscillation (SAO) in the Martian atmosphere. The semiannual periodicity is found in the difference between dayand night-time atmospheric temperatures, a good proxy for solar tides, measured from Mars Global Surveyor. Simulations with a general circulation model proved that this modulation of tidal amplitudes is a manifestation of the SAO of zon...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 1998
ISSN: 0094-8276
DOI: 10.1029/98gl00114