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Mars Global Surveyor
Mars Orbiter Camera (MOC)



High Resolution Views Comparing the Martian North and South Polar Residual Caps

MGS MOC Releases MOC2-210 to MOC2-219, 8 March 2000

The surfaces of the two "residual" martian polar ice caps are very different from each other. The north polar cap has a relatively flat, pitted surface that in some places resembles cottage cheese and in others looks like the surface of a sponge that you might use in your kitchen sink. The south polar cap has larger pits, troughs, and flat mesas that resemble pieces of swiss cheese.

In a paper published March 9, 2000, by the journal, Nature, members of the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) team, led by MOC investigator Peter Thomas of Cornell University (Ithaca, NY), have described some of the newly-discovered differences in polar geomorphology. The different shapes of the landforms on the north and south polar caps suggest that these regions have had different climates and histories for thousands or perhaps even millions of years. The pictures shown below describe the story presented in the Nature article.

Also see: JPL Press Release, March 8, 2000


moc2_msss_npole_5_99_i2.gif
MOC2-210
Residual Polar Caps
02c_M03_06646sub_i2.gif
MOC2-211
S Polar "Swiss Cheese"
moc2__msss_swisscheese_i2.gif
MOC2-212
More "Swiss Cheese"
01a_M00_00547sub_i2.gif
MOC2-213
N Polar "Cottage Cheese"
01b_CAL00433sub_i2.gif
MOC2-214
N Polar "Sponge"
01c_M00_2072sub_i2.gif
MOC2-215
N Polar Cap Layers
02a_M09_00609_i2.gif
MOC2-216
South Polar Cap Pits
02b_M03_06756sub_i2.gif
MOC2-217
S Polar Cap Troughs
02d_M07_02129sub_i2.gif
MOC2-218
S Polar Cap Aprons
02e_M04_03877sub_i2.gif
MOC2-219
South Polar Exhumation

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