Triton's streaks as windblown dust

Details Triton's streaks as windblown dust Triton's streaks as windblown dust

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.346..546s&link_type=abstract

Nature (ISSN 0028-0836), vol. 346, Aug. 9, 1990, p. 546-548. Research supported by NASA.

Physics

17

Dust, Ground Wind, Satellite Atmospheres, Satellite Surfaces, Triton, Atmospheric Circulation, Transport Properties, Voyager 2 Spacecraft, Wind Velocity

Scientific paper

Explanations for the surface streaks observed by Voyager 2 on Triton's southern hemisphere are discussed. It is shown that, despite Triton's tenuous atmosphere, low-cohesion dust trains with diameters of about 5 micron or less may be carried into suspension by aeolian surface shear stress, given expected geostrophic wind speeds of about 10 m/s. For geyser-like erupting dust plumes, it is shown that dust-settling time scales and expected wind velocities can produce streaks with length scales in good agreement with those of the streaks. Thus, both geyserlike eruptions or direct lifting by surface winds appear to be viable mechanisms for the origin of the streaks.

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