Meteorological results from the surface of Mars - Viking 1 and 2

Details Meteorological results from the surface of Mars - Viking 1 and 2 Meteorological results from the surface of Mars - Viking 1 and 2

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.4559h&link_type=abstract

Journal of Geophysical Research, vol. 82, Sept. 30, 1977, p. 4559-4574.

Mathematics

Logic

55

Mars Surface, Meteorological Instruments, Meteorological Parameters, Planetary Meteorology, Viking Lander 1, Viking Lander 2, Wind Measurement, Atmospheric Pressure, Atmospheric Temperature, Data Acquisition, Data Recording, Hodographs, Landing Sites, Wind Direction, Wind Velocity

Scientific paper

The meteorology equipment carried by the Viking landers was intended to measure atmospheric temperature, wind speed, wind direction, and pressure. During the summer months, the winds were a few meters per second, with a complex hodograph and the Lander-1 site, dominated by counterclockwise turning of the wind, and a simpler hodograph at the Lander-2 site, marked by clockwise turning of the wind. With advancing season, the repetitive wind pattern began to break down, and protracted northeasterly winds were recorded on several occasions (some of which are associated with lower than normal temperatures). Examples are given of wind and temperature traces over short periods, illustrating the effects of convection, static stability, and lander interference. A theoretical argument, based on the horizontal scale dictated by heating of slopes and on vertical mixing of momentum, is presented to explain the different sense of wind rotation at the two lander sites.

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