Many spots of clouds on Mars, Mars at Ls 66 degrees (June 2006) |
Many spots of clouds on Mars, Mars at Ls 66 degrees (June 2006) |
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#1
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 ![]() |
Most martian visibles clouds only hovers at high altitude. These are found around Olympus, Tharsis mountains, Alba Patera, above the Margaritifer Terra, Meridian Planum and most of South polar region: Planum Australe.
http://www.marstoday.com/news/viewsr.html?pid=20843 Rodolfo |
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#2
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![]() Member ![]() ![]() ![]() Group: Members Posts: 144 Joined: 17-July 07 From: Canberra Australia Member No.: 2865 ![]() |
Yeah I am probably out of date. But the last article I saw for Mars Global Surveyor (JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 112) indicated that while Mars equatorial mesospheric clouds had been detected using TES/MOC, The lack of detectable infrared radiances at MEM cloud heights precluded distinction of water versus CO2 ice. The authors also noted Mars Express observations pointing to CO2 clouds. A few Mariner 6 and 7 infrared spectrometer (IRS) limb scans showed a reflection spike attributed to CO2 clouds at around 25 km altitude with a low upper atmosphere temperature. But Viking data could not confirm the low temperatures and re-evaluation of data in the mid 90s attributed the results to either H2O ice contaminated CO2 clouds or surface CO2 ice deposits with H2O ice contamination. An ambiguous result.
The abstract noted that CO2 ice is known to appear as clouds and they are not claiming to have discovered clouds on Mars, or even to be the first to identify CO2 clouds. But the first unambiguous observation of CO2 ice clouds? Since this is the author's opinion it is quite reasonable to present it in the paper and it could well be an accurate statement. |
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