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Tag Archives: recurring slope lineae
HiRISE: Recurring slope lineae in Juventae Chasma
Recurring slope lineae (RSL) are best explained as due to seasonal seeping of water on steep slopes in warm seasons. The HiRISE team has produced digital terrain models (DTMs) for many key RSL sites, which then allows us to orthorectify … Continue reading
Posted in Reports
Tagged brine seeps, brines, High Resolution Imaging Science Experiment, HiRISE, Juventae Chasma, Mars Reconnaissance Orbiter, MRO, NASA, recurring slope lineae, RSL, University of Arizona, water
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HiRISE: What gullies can say
Right past the sharp, but warped rim of this ancient impact crater are deposits of winter frost, which show up as blue in enhanced color. There are two possible science goals that we can study here: what does the terrain…. … Continue reading
Posted in Reports
Tagged frost, gullies, High Resolution Imaging Science Experiment, HiRISE, ice, Mars Reconnaissance Orbiter, MRO, NASA, recurring slope lineae, RSL, University of Arizona, water
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HiRISE: Surprising landslump in Melas Chasma
HiRISE has been monitoring the recurring slope lineae (RSL) over the mid-latitude and equatorial regions of Mars. One of these sites is a crater on the floor of Melas Chasma; and an animation shows how the RSL follow the sun, … Continue reading
Posted in Reports
Tagged dark slope streaks, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, mass wasting, Melas Chasma, MRO, NASA, recurring slope lineae, RSL, University of Arizona
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HiRISE image: Recurring slope lineae in Coprates
Recurring slope lineae (RSL) may be due to active seeps of water. These dark flows are abundant along the steep slopes of ancient bedrock in Coprates Chasma. The enhanced-color cutout shows a full-resolution sample. The RSL are most prominent on … Continue reading
Posted in Reports
Tagged Coprates Chasma, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, recurring slope lineae, RSL, University of Arizona, Valles Marineris
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HiRISE image: Warm-season slope flows
Dark, seasonal flows emanate from bedrock exposures at Palikir Crater on Mars in this image from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars Reconnaissance Orbiter. These flows, now documented at several places on Mars, form and … Continue reading
Posted in Reports
Tagged High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, Palikir Crater, recurring slope lineae, RSL, University of Arizona
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HiRISE image: RSLs and colorful fans along Coprates Chasma ridge
This site along a Coprates Chasma ridge shows what are called recurring slope lineae (or RSL) on generally north-facing slopes in northern summer/southern winter (latitude 12.9 degrees S, longitude 295.5 degrees E). With an animation constructed from multiple co-located images, … Continue reading
Posted in Reports
Tagged Coprates Chasma, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, recurring slope lineae, RSL, University of Arizona, Valles Marineris
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Recurring slope lineae discovered deep in Valles Marineris
Discovered in 2011, recurring slope lineae (RSL for short) are narrow, dark lines on steep slopes. They appear and grow longer during the warmest time of year, then fade and disappear over winter. They recur in the same places the … Continue reading
Posted in Reports
Tagged brine seeps, brines, brines, CRISM, ground ice, groundwater, HiRISE, ice, Mars Reconnaissance Orbiter, recurring slope lineae, RSL, Valles Marineris, 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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What Earth’s saltiest pond says about Mars
An Antarctic pond that’s the saltiest natural body of water on Earth stays wet in part by pulling moisture out of the air, scientists have discovered. And that has implications for possible brine seeps and reservoirs on Mars. Don Juan … Continue reading
Posted in Reports
Tagged Antarctica, brine seeps, brines, calcium chloride, deliquescence, Don Juan Pond, ice, lineae, liquid water, ponds, recurring slope lineae, RSL, water
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Salty flows on Mars
The features known as “recurring slope lineae” (RSL) are the best evidence going that liquid water can, and does, flow on present-day Mars. The lineae are small dark streaks that appear mostly on equator-facing slopes, are associated with slope channels, … Continue reading
Posted in Reports
Tagged brines, CRISM, lineae, Mars Reconnaissance Orbiter, recurring slope lineae, RSL, water
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