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Seasonal flows on warm Martian slopes
Seasonal flows on warm Martian slopes (also called recurring slope lineae, recurrent slope lineae and RSL)〔 are thought to be salty water flows occurring during the warmest months on Mars.
The flows are narrow (0.5 to 5 meters) and exhibit relatively dark markings on steep slopes, appear and incrementally grow during warm seasons and fade in cold seasons. Liquid brines near the surface almost certainly explain this activity, but the exact source of the water and the mechanism behind its motion are not understood. On October 5, 2015, possible RSLs were reported on Mount Sharp near the ''Curiosity'' rover.
==Overview==
Research indicates that in the past there was liquid water flowing on the surface of Mars,〔(【引用サイトリンク】 title=Science@NASA, The Case of the Missing Mars Water )〕 creating large areas similar to Earth's oceans.〔ISBN 0-312-24551-3〕 However, the question remains as to where the water has gone.
The Mars Reconnaissance Orbiter (MRO) is a multipurpose spacecraft launched in 2006 designed to conduct reconnaissance and exploration of Mars from orbit. The spacecraft is managed by the Jet Propulsion Laboratory (JPL).〔(【引用サイトリンク】 title=NASA Spacecraft Data Suggest Water Flowing on Mars )〕 The HiRISE instrument is at the forefront of the ongoing RSL studies as it helps chart the features with images of closely monitored sites typically taken every few weeks.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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