Seasonal Flows on Warm Martian Slopes

Details Seasonal Flows on Warm Martian Slopes Seasonal Flows on Warm Martian Slopes

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sci...333..740m&link_type=abstract

Science, Volume 333, Issue 6043, pp. 740- (2011).

Physics

17

Scientific paper

Water probably flowed across ancient Mars, but whether it ever exists as a liquid on the surface today remains debatable. Recurring slope lineae (RSL) are narrow (0.5 to 5 meters), relatively dark markings on steep (25° to 40°) slopes; repeat images from the Mars Reconnaissance Orbiter High Resolution Imaging Science Experiment show them to appear and incrementally grow during warm seasons and fade in cold seasons. They extend downslope from bedrock outcrops, often associated with small channels, and hundreds of them form in some rare locations. RSL appear and lengthen in the late southern spring and summer from 48°S to 32°S latitudes favoring equator-facing slopes, which are times and places with peak surface temperatures from ~250 to 300 kelvin. Liquid brines near the surface might explain this activity, but the exact mechanism and source of water are not understood.

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