High-altitude ice clouds may have Keep warm enough According to Mars, the planet developed into rivers and lakes A study Information from the University of Chicago, published by the American magazine this Monday Proceedings of the National Academy of Sciences (PNAS).
Research reveals One of the biggest mysteries of Mars: This red planet receives less than one-third of the sunlight that we enjoy today on today’s earth, so how can this red planet have rivers?
The answer can be in Amount of ice Research led by Edwin Kite, a professor of geophysics at the University of Chicago, shows that it was on Mars.
If there is ice covering most of Mars Moisture will be generated on the surface Studies believe that this will benefit low-altitude clouds, but these are not enough to overheat the planet.
However, if there are only very few ice areas, such as at poles or mountain tops, the air on the ground will become drier, resulting in Clouds at higher altitudes tend to increase the planet’s temperature through the greenhouse effect.
“In the model, these clouds behave differently from their behavior on the earth. It is not feasible to create a model based on the intuition of the earth, because the water cycle It’s not like anything on earth, Quickly move water from the atmosphere to the surface,” Kite pointed out.
The point is that the water on the earth covers almost three-quarters of the earth’s surface. Move quickly and unevenly Between the ocean, atmosphere and land, some areas are deserts like the Sahara, while others are submerged in water like the Amazon River.
According to the model of Kite and his team, there is much less water on the surface of Mars, so when water vapor rises into the atmosphere It stayed there longer.
“Once the water enters the Martian atmosphere, it will be there for a long time-about a year- Created conditions for long-term high-altitude clouds”, comment.
Kite hopes that NASA Perseverance Robot, currently roaming the surface of Mars, can Provide more details In this regard, by analyzing the rocks, the past atmospheric pressure on the red planet can be reconstructed.
For researchers, it’s important to understand How Mars gains and loses its atmosphere Help us find other habitable planets, because it is “the only known planet that can develop living conditions and then lose life conditions”.
“The earth’s long-term climate stability is surprising. We want to understand all the ways to destroy stability and how to maintain stability (not just on earth). This research defines new areas for comparing planetary habitability,” Kite concluded.