Tag Archives: climate cycles

HiRISE: The changing climate of Mars

A story of changes in the climate of Mars is told by icy deposits. Remnants of a formerly extensive deposit composed of dry ice layered together with dust and water ice form what is known as the south polar residual … Continue reading

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HiRISE: Korolev Crater layers

Korolev Crater layers. With HiRISE resolution, paleoclimate analysis can be done to determine the possible climate record held within ice mounds, like those here. Beautiful Mars series. [More at links]

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Warmer, wetter early Mars: a geological and climatological case

The climate of early Mars is a subject of debate. While it has been thought that Mars had a warm and wet climate, like Earth, other researchers suggested early Mars might have been largely glaciated. A recent study by Ramses … Continue reading

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History of Mars’ water, seen through the lens of Gale Crater

The surface of Mars today is cold, dry, and inhospitable to life. But was it always so? Past research indicates that the Red Planet may have been a very different world more than 3 billion years ago, with warmer weather, … Continue reading

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Valley networks point to much wetter past

A new study led by Northern Illinois University geography professor Wei Luo calculates the amount of water needed to carve the ancient network of valleys on Mars and concludes the Red Planet’s surface was once much more watery than previously … Continue reading

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THEMIS: South polar cap layers

THEMIS Image of the Day, March 3, 2017. This VIS image shows the layering of the South Polar cap of Mars. The image is located at the margin between the cap ice and the surrounding plains (bottom of image). More … Continue reading

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THEMIS: Pages from the south polar climate history book

THEMIS Image of the Day, February 22, 2017. Today’s VIS image shows part of the south polar cap. It is now summer in the region and the surface frosts are gone. The layers of ice comprising the cap are now … Continue reading

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Early Mars climate changes driven by carbonate – silicate cycle

Dramatic climate cycles on early Mars, triggered by buildup of greenhouse gases, may be the key to understanding how liquid water left its mark on the planet’s surface, according to a team of planetary scientists. Scientists have long debated how … Continue reading

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