Last year, a study published in Science magazine showed Mars liquid water under the southern polar ice cover. Now, a new study in AGU magazine Geophysical Research Letters states that it is necessary to have an underground heat source for liquid water under the polar ice cap
. . Instead, the authors propose the latest magmatic activity – the formation of a magma chamber over the last several hundred thousand years – after the surface of Mars, to have enough heat to produce liquid water in kilometers and half a thick ice cap. In the second half, the authors of the study argue that if there was no recent magmatic activity on the surface of Mars, there is no expected liquid water under the ice cover.
"Different people can go differently and we are really interested in the community's reaction to it," said Michael Sori, associate associate at Arizona University's Moon and Planet Laboratory, and the new author.
Recently, the weight of underground magmatic activity in Marse promotes the idea that Mars is active on the planet, geologically. This fact could give scientists a better understanding of how the planets evolve over time.
The new study focuses on further discussions on the availability of liquid water in Mars. The presence of liquid water on the Red Planet has the potential to look for life outside the Earth and can also become a resource for the future exploration of our neighboring planet
"We believe that if there is any life, it is likely to be protected from radiation," said Arizona University Ali Bramson, PhD in Moon and Planet Science. “If there are still magic processes today, they may have been more common in the past and could have provided a broader base smell. This could create a more favorable environment for liquid water and possibly life.
Mars piles are two huge ice sheets, both a couple of kilometers away. The liquid water on earth is under the thick ice sheets, and the planet's heat causes ice where it meets the earth's crust.
Scientists said the study published last year is a similar phenomenon in Mars. They argued that radio observations showed that Mars's southern polar ice cover was liquid water. However, the research did not examine how liquid water could have been there.
Mars is much cooler than Earth, so it is unclear what kind of environment would be needed to melt ice on the bottom of the ice cover. Although previous studies have investigated whether liquid water may be used as a basis for Mars ice caps, no one has yet explored the specific place where the research found water to be found.
"We thought to find out whether [the liquid water] is real, what kind of environment you need to dissolve the ice, what temperature do you need, what type of geological process do you need? Because it should be too cold under normal conditions, ”Sori said.
The search for heat
The authors of the new research thought first of all that the ice cap is the correct quantity of liquid water and then worked to find out what parameters are needed for the water to exist. They did a physical simulation of Mars to understand how much heat is coming out of the planet and whether there is enough salt in the bottom of the ice cover to melt the ice. The salt significantly reduces the melting point of the ice, so it was thought that the salt could melt the bottom of the ice cap.
The model showed that the salt alone would raise the temperature to dissolve the ice high enough. Instead, the authors suggest that additional heat from Mars' interior is required
Publication: Michael M. Sori et al., "Water in Mars, with Cereal Grains: Local Heat Anomalies Required for Basic Melting Today's Ice on South Axis", Geophysical Research Letters 2019; doi: 10.1029 / 2018GL080985