Long range transport of fine grained sediments on Mars: Atmospheric dust loading, as inferred from Viking Lander imaging data

Details Long range transport of fine grained sediments on Mars: Atmospheric dust loading, as inferred from Viking Lander imaging data Long range transport of fine grained sediments on Mars: Atmospheric dust loading, as inferred from Viking Lander imaging data

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pggp.rept..160p&link_type=abstract

In NASA. Washington Rept. of Planetary Geol. Program, 1983 p 160 (SEE N84-23431 13-91)

Computer Science

Dust Storms, Mars Atmosphere, Mars Surface, Sediment Transport, Atmospheric Composition, Beer Law, Suspending (Mixing), Viking Lander Spacecraft

Scientific paper

During the first Viking year, two global dust storms occurred and they contributed about 90% of the dust suspended in the Martian atmosphere on a global average, over the course of this year. The remainder was due to the cumulative effect of local dust storms. When globally distributed, the amount of suspended dust introduced into the atmosphere this Martian year was about 5x10(-3) g/sq cm. This mass loading was derived from the incremental optical depths measured over this year and estimates of the mean size of the dust particles (2.5 microns). During the second Martian year, global dust storms were far more muted than during the first year. No near perihelion dust storm occurred, and a somewhat weaker dust storm may have occurred near the start of the spring season in the Southern Hemisphere, at about the same time that the first global dust storm of the first year occurred. Thus, the dust loading derived for the first Martian year may be somewhat higher than the average over many Martian years, a conclusion that appears to be supported by preliminary studies of Martian years beyond the second Viking year on Mars.

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