... Viking also definitively determined that the residual north polar icecap (that survives the northern summer) is water ice ... The permanent north cap is water ice; the southern cap probably retains some carbon dioxide ice through the summer. ...
... much of the carbon dioxide frost around the permanent water-icecap has sublimated, and the cap has receded to its core of ... Unlike the south polar cap, the north polar cap probably consists of water-ice. (Courtesy Calvin J. Hamilton) . Dunefield . ...
... observations have shown that this summertime "residual" polar cap is composed of water ice, just like Earth's polar caps ... can be seen along the left limb of the planet, and a large cyclonic storm composed of water ice is churning near the polar cap ...
... The large south polar cap at the bottom of the image is highly reflective and slightly pink in color; it might consist of a slowly evaporating layer of nitrogen ice deposited during the previous winter. ...
... It's not known if a similar layer of water ice exists below the southern cap (left) since its carbon dioxide layer never completely disappears. ...
... Along the edge of the polar cap, cyclonic disturbances are common during the late ... This storm system is located at the edge of the northern polar cap. ... are often found at the edge of the polar cap, and in the Tharsis and Lunae Planum ...
... The outermost epsilon ring is composed mostly of ice boulders several feet across. ... of bright clouds in the planet's southern hemisphere, and a high altitude haze that forms a "cap" above the planet's south pole ...