The gradual disappearance of the water occurs when sunlight and chemistry turn water molecules into the hydrogen and oxygen atoms that they are made up of.
Researchers say the atmosphere contains 100 times more water vapor than theoretical estimates. These atoms, not bound by the relatively low gravity of Mars, are then free to escape into space.
Ongoing researches show that a lot of water may consistently make fast intrusions into Mars' upper environment. The researchers found that occasional changes were the key variables driving how water vapor was circulated in the Martian air.
It's been just revealed that water might be escaping the Red Planet even faster than it has been previously believed. With the observed supersaturation rates, the limit of water to escape would significantly increase during specific seasons.
In a similar way, NASA is targeting the Moon's south pole for a manned landing in 2024 because it is known to store large amounts of frozen water. Ultimately, we might also learn what eventually led to Mars losing all its liquid water from the surface.
Dr Montmessin said: "Mars once harboured an active hydrological cycle, as demonstrated by geological features on its surface, but it no longer holds the quantity of water required to produce such geological imprints".
All that remains of the planet's once plentiful water is now trapped as ice in the Red Planet's polar ice caps. Instead of staying at the expected level, the water on Mars hangs in the atmosphere of the planet at a distance of 80 km above the surface, causing much more water loss than predicted.