Origin of Martian methane uncovered
Scientists have reportedly found the source of methane on Mars in a discovery that may indicate the presence of life indicating chemical on the neighboring planet.
Mars atmosphere contains methane traces (public domain)
The first traces of methane in the Red Planet’s atmosphere were detected 15 years ago and debates on the accuracy of the measurements have not ceased ever since. The stake is high, since methane on Earth is largely produced by simple life forms, writes Phys.org.
Due to fast dissipation of gaseous CH4 and the difficulty of observing the Martian atmosphere, many scientists were skeptical about the reliability of the previous results which were based just on a single data set.
But probe measurements from two different spacecrafts, recorded in just one day time interval back in 2013, have been examined now to provide independent evidence of methane presence on Mars.
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Researcher also carried out 2 parallel experiments to determine the most probable source of methane on Mars and results pointed to an ice layer located east of Crater Gale.
Concentrations of Methane discovered on Mars. Credit: NASA
“Two completely independent lines of investigation led to the same general area of the most likely source for the methane,” said Marco Giuranna of the National Astrophysics Institute in Rome, Italy.
ESA’s Mars Express probe detected 15.5 parts per billion methane in the atmosphere above the Gale crater on June 16, 2013. The presence of the gas in the proximity was acknowledged by field analysis made 24 hours before by NASA’s Curiosity rover.
“Methane is important because it could be an indicator of microbial life. But life is not necessary to explain the presence of CH4, because the molecule can also be produced by abiotic processes,” Giuranna said.