More updates on 'dry ice' sublimation (ablation) effects on Mars (published today, 4th Feb) ..
Winds of change strike Mars, too:
Quote:
The new findings help scientists to better understand what features and landscapes on Mars can be explained by current processes and which require environmental conditions no longer present on the planet.
"Understanding how Mars is changing today is a key first step to understanding basic planetary processes and how Mars changes over time," said HiRISE Principal Investigator Alfred McEwen, a professor in the UA's department of planetary sciences and a co-author of both reports. "There's lots of current activity in areas covered by seasonal carbon-dioxide frost, a process we don't see on Earth. It's important to understand the current effects of this unfamiliar process so we don't falsely associate them with different conditions in the past."
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… more evidence in support of my words:
Quote:
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Originally Posted by CraigS
Clearly, there is H2O on Mars. The quantity of it is still approximated using models and inferred results, rather than by direct measurements. Large volumes of frozen CO2 have not been entirely discounted as a possibility as the origin of some of the geological formations on the surface. As they look more into this aspect, some of the geological evidence supporting the large volumes of liquid H2O theory may, (or may not), erode the supporting case.
The so called Mars 'devastation' theory depends on the inferred results of the above mentioned data, which leads to the conclusion that there was a lot of liquid H2O on Mars in the past. The possibility that there wasn't a lot of H2O is not inconsiderable, which is why I still have doubts.
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Very interesting ..
Cheers