Prior research has suggested that there is water beneath the south polar ice cap of Mars. New evidence from an international research team suggests that there may be liquid water under Mars' south polar ice cap. The researchers, led by the University of Cambridge, utilized laser-altimeter data f
, utilized laser-altimeter data from spacecraft to uncover subtle patterns in the ice cap’s height. After that, they demonstrated how these patterns corresponded to computer model predictions of the effects that a body of water under the ice cap would have on the surface.
The left-hand panel shows the surface topography of Mars’s south pole, with the outline of the south polar cap in black. The light blue line shows the area used in the modelling experiments, and the green square shows the region containing the inferred subglacial water. The ice in the region is around 1500 m thick. The right-hand panel shows the surface undulation identified by the Cambridge-led research team.
Similar to Earth, Mars has thick water ice caps at both poles that together about match the volume of the Greenland Ice Sheet. The polar ice caps on Mars, however, were previously believed to be frozen solid all the way to their beds owing to the frigid Martian climate, unlike Earth’s ice sheets, which are underlain by water-filled channels and even large subglacial lakes.
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