Starship Asterisk*

Guest wrote:
If the wind blows down from the North Pole, meaning towards the equator,and Mars rotates on its axis counterclockwise as seen from above the the North Pole, the spiral should unwind clockwise (Coriolis force), not counterclockwise as shown.

ESTRELLAFIN wrote:
DOES THE CO2 FROST SUBLIMATE AND WHEN IT ENTERS THE ATMOSPHERE GET BLOWN AWAY BY THE SOLAR RIGHT?
SO WHERE IS NEW CO2 COMING FROM...??

• If Mars were ALL CAPS ALL THE TIME then ALL the atmospheric CO₂ might condense into dry ice.

https://en.wikipedia.org/wiki/Atmosphere_of_Mars wrote:
<<The main component of the atmosphere of Mars is carbon dioxide (CO₂) at 95.9%. Each pole is in continual darkness during its hemisphere's winter, and the surface gets so cold that as much as 25% of the atmospheric CO₂ condenses at the polar caps into solid CO₂ ice (dry ice). When the pole is again exposed to sunlight during summer, the CO₂ ice sublimes back into the atmosphere. This process leads to a significant annual variation in the atmospheric pressure and atmospheric composition around the Martian poles.>>

https://en.wikipedia.org/wiki/Planum_Boreum wrote:
<<The spiral troughs in the ice cap are formed by katabatic winds that entrain surface ice eroded from the equator-facing sides of the troughs, likely aided by solar ablation (sublimation), which is then redeposited on the colder pole-facing slopes. The troughs are roughly perpendicular to the wind direction, which is shifted by the Coriolis effect, leading to the spiral pattern. The troughs gradually migrate towards the pole over time; the central troughs have moved about 65 km in the last 2 million years. Chasma Boreale is a canyon-like feature older than the troughs, and in contrast is aligned parallel to the wind direction.>>

https://en.wikipedia.org/wiki/Chasma_Boreale wrote:

[b][color=#0000FF]Red Cliffs of Mars, at the Chasma Boreale. 2008 photo by HiRISE.[/color][/b]

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<<Chasma Boreale is a large canyon in Mars's north polar ice cap in the Mare Boreum quadrangle of Mars at 83° north latitude and 47.1° west longitude. It is about 560 km long and was named after a classical albedo feature name. The canyon's sides reveal layered features within the ice cap that result from seasonal melting and deposition of ice, together with dust deposits from Martian dust storms. Information about the past climate of Mars may eventually be revealed in these layers, just as tree ring patterns and ice core data do on Earth. Both polar caps also display grooved features, probably caused by wind flow patterns. The grooves are also influenced by the amount of dust. The more dust, the darker the surface. The darker the surface, the more melting as dark surfaces absorb more energy.>>

Boomer12k wrote:Dry Ice to Chill the Champagne...a toast to Martian Xmas....Martian Santa getting ready no doubt...
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