The icebergs give the craters a new glimpse into Mars’ past

Hāʻawi nā puʻu hau i nā lua i ka ʻike hou i ke aniau o Mars i hala

Snowfall at the second Burroughs on Mars, with images from THEMIS (left) and HiRISE (right). The ice plates here record weather oscillations that are directly related to changes in Mars’ orbit and tilt, according to a new study in the journal AGU. Geophysical Research Map. Yes: Sori et al.

The newly discovered ice deposits in volcanoes scattered around the southern part of Mars provide information on how the Earth orbits the Earth’s atmosphere over a period of 4 million years. past, according to a new study. The findings have helped scientists understand who controlled Mars’ atmosphere in the past, which is important for predicting when Earth could be inhabited.

The study was published in the AGU journal Geophysical Research Mapwhich produces high -quality short -term research with findings related to earth and aerospace science.

The ice on Mars represents a combination of temperature, hydrology and planetary dynamics, as do their activity on Earth. The rotation and orbit of the earth affects the temperature and sunlight on the skin, which helps the atmosphere. Thicker and cleaner ice layers indicate colder seasons with higher ice accumulation, while darker layers are warmer and more likely to build up ice.

The new study compares these ice plates to the belt of Mars’ axis and its orbital precession, or the shape of the Earth’s elliptical circle around the sun in time, without knowing it or not. trust.

The data gives scientists insight into how Mars’ atmosphere changes over time. Although the study has been limited in the past, the establishment of these space-orbit relationships to help scientists better understand the Martian universe in the past could be useful. help pinpoint times of availability.

“It’s not thought how clean those features are in orbital circles,” said lead author Michael Sori, an earth scientist at Purdue University. “It’s a very reasonable game, as you ask.”

From the hats to the holes

Previously, Martian scientists had looked at polar ice caps, hundreds of kilometers away. However, these archives are outdated and may have been lost in the long run, missing the important details necessary to establish trust in the relationships between the order and movement of the earth and its structure. aniau.

Sori and her colleagues searched the icebergs in the craters, which were only ten kilometers wide but were getting deeper and harder. After exploring most of the south side, they pointed to the Burroughs crater, 74 kilometers wide, “very well maintained” layers seen from NASA HiRISE images, Sori said.

The researchers analyzed the thickness and shapes of the plates and found that they had similar features to two important Martian orbital dynamics, the belt of Mars’ axis and the orbital precession, over 4 years and so on. 5 million.

The findings complement previous research, which used Mars polar ice stories to establish orbital relationships. But those stories that are “happy,” or difficult, really connect the two. Clean ice holds much less complexity than weather records, which researchers have used to compare changes in climate with orbital precession and precipitation with a high degree of accuracy.

Mars as a natural lab

Understanding the relationships between orbital circles and the universe is important for understanding Martian history and the dynamics of the harsh atmosphere on Earth. “Mars is a natural laboratory for studying orbital forces in the universe,” Sori said, because so many complex things that live on Earth – biology, tectonics – are irrelevant on Mars. . The whole world, in a sense, is subject to change for scientists.

“If we are to understand the universe, we have to go to places where there are no such organisms,” said Isaac Smith, an earth scientist at the Planetary Science Institute and York University who did not participate in the research. . . In that sense, “Mars is a clean planet. And there are a lot of potential applications here. Mars with Pluto and Triton is bigger than you think.”

Small ice cubes do not have the clean layers visible on their skin. Some can be hidden in the hills. As a result, Sori said, the goal is to test ice rates like scientists do on Earth, but Mars rovers don’t have that power. However, scientists can use radar data to enter the earth to “look inside” the ice and look at the layers, to ensure that the number of layers seen in the archive is increasing. It’s a good overview of the current study, and the trail could help locate the upcoming Martian ice without visible layers on the skin.

“Being able to pull a signal of the weather from a small ice sheet is a very good result,” said Riley McGlasson, a historian from Purdue University who used this technique in new research. “With the radar, we can get closer to the full story. That’s why I’m excited to do this level again in the future.”


The ice islands on Mars and Pluto can show climate change


More information:
Michael M. Sori et al, Orbital Force of Martian Climate demonstrated at the South Polar Outlier Ice Deposit, Geophysical Research Map (2022). DOI: 10.1029 / 2021GL097450

Presented by the American Geophysical Union

Directions: Mounds of ice give craters give more insight into Mars’ past (2022, March 29) Retrieved March 29, 2022 from https://phys.org/news/2022-03-mounds -ice-craters-insight-mars.html

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