Chasma Borealis – Mars Reconnaissance Orbiter

Chasma Borealis - Mars Reconnaissance Orbiter

A portion of Chasma Boreale, a large canyon incised into Mars’ north polar ice cap. In this location Chasma Boreale is about 1.5 km (4600 ft) deep.

Computer models suggest this canyon was carved by extremely cold air flowing at high speeds off the ice cap, which over millenia have cut deep into the ice. Sand dunes formed by the high winds can be seen at lower left.

Erosion has exposed internal layers of the ice cap, which are thought to record hundreds of thousands or millions of years of climate variation. These layers contain varying levels of dust, corresponding to different stages of the Martian climate cycle. Several sequences of layers, which are deposited on previous sequences at an angle, likely record previous canyons eroded into the ice cap, or major meltbacks of the cap.

This image was created using the CRISM imaging spectrometer. Each pixel of a CRISM image contains a 500 point spectrum, from which a color can be reconstructed. This reconstructed color was overlaid on a higher-resolution image taken with the Mars Reconnaissance Orbiter Context Camera (CTX), which simultaneously took a photo while CRISM was collecting data.

This image was taken on November 11, 2006. It uses CRISM observation FRT00002FA6 and CTX observation P01_001386_2649_XI_84N357W.

Image Credit: NASA / JPL / JHUAPL / MSSS / Justin Cowart

Posted by jccwrt on 2020-12-11 02:09:14

Tagged: , Mars Reconnaissance Orbiter , Mars , CRISM , CTX , Chasma Borealis , ice cap , layers

Chasma Borealis – Mars Reconnaissance Orbiter

Chasma Borealis - Mars Reconnaissance Orbiter

A portion of Chasma Boreale, a large canyon incised into Mars’ north polar ice cap. Computer models suggest this canyon was carved by extremely cold air flowing at high speeds off the ice cap, which over millenia have cut deep into the ice. In this location Chasma Boreale is about 1.5 km (4600 ft) deep.

Erosion has exposed internal layers of the ice cap, which are thought to record hundreds of thousands or millions of years of climate variation. These layers contain varying levels of dust, corresponding to different stages of the Martian climate cycle. Several sequences of layers, which are deposited on previous sequences at an angle, likely record previous canyons eroded into the ice cap, or major meltbacks of the cap.

This image was created using the CRISM imaging spectrometer. Each pixel of a CRISM image contains a 500 point spectrum, from which a color can be reconstructed. This reconstructed color was overlaid on a higher-resolution image taken with the Mars Reconnaissance Orbiter Context Camera (CTX), which simultaneously took a photo while CRISM was collecting data.

This image was taken on November 12, 2006. It uses CRISM observation FRT00002FA6 and CTX observation P01_001386_2649_XI_84N357W.

Image Credit: NASA / JPL / JHUAPL / MSSS / Justin Cowart

Posted by jccwrt on 2020-12-11 02:09:15

Tagged: , Mars Reconnaissance Orbiter , Mars , CRISM , CTX , Chasma Borealis , ice cap , layers

Chasma Boreale – Mars Reconnaissance Orbiter

Chasma Boreale - Mars Reconnaissance Orbiter

Natural color image of Chasma Boreale, a large canyon carved into the edge of Mars’ north polar ice cap. The large cliff at image center is 1.4 km (4,600 feet) high, and exposes alternating layers of ice and dust that have accumulated over tens of thousands of years. Computer models suggest that this canyon is formed by cold air flowing off the polar cap during winter, creating gusty winds that favor the removal of material. Some evidence for this can be seen in the large dune field filling the canyon floor.

This natural color was created using the CRISM imaging spectrometer. Each pixel of a CRISM image contains a 500 point spectrum, from which a color can be reconstructed. This reconstructed color was overlaid on a higher-resolution image taken with the Mars Reconnaissance Orbiter Context Camera (CTX), which simultaneously took a photo while CRISM was collecting data.

This image was taken on November 28, 2006. It uses CRISM observation HRL0000330c and CTX observation P01_001593_2635_XI_83N241W

Image Credit: NASA / JPL / JHUAPL / MSSS / Justin Cowart

Posted by jccwrt on 2020-10-24 20:00:27

Tagged: , Mars , Mars Reconnaissance Orbiter , CRISM , CTX , Chasma Boreale , ice cap , Mars North Pole , dunes