A Present Day Frozen Sea on Mars?

Evidence from HRSC Mars Express for a Frozen Sea Close to Mars’ Equator (PDF abstract), Lunar and Planetary Science XXXVI (2005)

“We have found evidence consistent with a presently-existing frozen body of water, with surface pack-ice, around +5 latitude and 150 east longitude in southern Elysium. It measures about 800 km x 900 km and averages up to 45 m deep: similar in size and depth to the North Sea.”

‘Pack ice’ suggests frozen sea on Mars, New Scientist

“One problem with this proposed frozen sea is that there is very little water vapour in the Martian atmosphere today. [Michael] Carr says that if there had been relatively recent sublimation, as the scientists propose, some traces of water should remain in the atmosphere.”