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Monthly Archives: April 2013
Most deltas on Mars created by short, catastrophic floods
Rivers that run into lakes and other standing bodies of water drop sediment where the flow slackens as it enters the body of water. Over time, the accumulating material builds a delta — a wedge of sediment whose form can … Continue reading
Posted in Reports
Tagged atmosphere, channels, climate, climate change, crater lakes, deltas, floods, water
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Are brines actually needed to make recurring slope lineae flow?
Recurring slope lineae (RSL) are finger-like dark lines on steep slopes that appear and grow longer during the warmest time of year, then fade and disappear over winter. They repeat the following Mars year in the same places. While scientists … Continue reading
Posted in Reports
Tagged atmosphere, climate, climate change, Context Camera, CTX, HiRISE, ice, lineae, LPSC 2013, Mars Odyssey, Mars Reconnaissance Orbiter, recurring slope lineae, RSL, TES, Thermal Emission Imaging System, Thermal Emission Spectrometer, water
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‘Faint young Sun paradox’ a problem for Mars (and Earth, too)
Astronomers say that billions of years ago when the Sun was young, it shone with only 70 percent its current brightness, notes Robert Craddock (Smithsonian Institution). If that were true of today’s Sun,
Posted in Reports
Tagged atmosphere, climate, climate change, faint young Sun paradox, fluvial channels, Kepler Observatory, LPSC 2013, valley networks, water, wind
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Gale’s winds sculpted the Mt. Sharp mound as they built it
The major reason for sending the Mars Science Laboratory rover Curiosity to Gale Crater is the five-kilometer (three-mile) high layered mound, dubbed Mt. Sharp, that looms at the crater’s center. The lowest layers have been altered by water
Posted in Reports
Tagged Aeolis Mons, atmosphere, climate change, Curiosity, dust, eolian, Gale Crater, katabatic winds, LPSC 2013, Mars Science Laboratory, Mount Sharp, wind, wind erosion
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