Computer Science
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.341..609l&link_type=abstract
Nature (ISSN 0028-0836), vol. 341, Oct. 19, 1989, p. 609-612. Research supported by the Swedish Board for Space Activities and A
Computer Science
219
Atmospheric Boundary Layer, Atmospheric Composition, Mars Atmosphere, Planetary Magnetospheres, Solar Planetary Interactions, Mars Probes, Planetary Magnetic Fields, Shock Waves, Soviet Spacecraft
Scientific paper
The results are reported of an ion-composition experiment on board the Phobos 2 spacecraft which was used to determine the loss of plasma from the Martian ionosphere. Surprisingly, there are many similarities between the ionospheric outflow from Mars and earth. The ion loss from Mars results from both ion pickup due to mass-loading of the solar wind in the Martian boundary layer and ionospheric O(+) beams of energies up to several keV, possibly from upward acceleration processes similar to those observed above the earth's auroral oval. A preliminary estimate of the ionospheric outflow from Mars indicates that the planet is losing oxygen at a rate of about 3 x 10 to the 25th ions/s. This corresponds to an evacuation of its present total atmospheric oxygen content in less than 100 million years.
Borg H.
Hultqvist Bengt
Lundin Richard
Pellinen R.
Zakharov Alexander
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