This week, NASA's Curiosity Mars rover found a surprising result: the largest amount of methane ever measured during the mission — about 21 parts per billion units by volume (ppbv).
However, this news in the spanish press surprised me today as it is titled: "There is no methane on Mars or there has been in the last 350 years".
"We did not detect any methane over a range of latitudes in both hemispheres, obtaining an upper limit for methane of about 0.05 parts per billion by volume, which is 10 to 100 times lower than previously reported positive detections" (Korablev et al.,2019).
In the interview, the spanish scientifist of ESA put on doubt NASA's measure:
"I would be delighted to find methane on Mars. And if it were of biological origin, better than better. But if there had been in the last 350 years, it would be all over the planet and NOMAD would have detected it. None of the Curiosity measurements is able to confirm the origin of the methane they say they have registered. What the observations made from terrestrial telescopes have detected is an asymmetry, an irregularity that they have interpreted as Martian methane. But the published measurements contradict the most elementary atmospheric physics since it is impossible that it is only concentrated in one area", warns López Moreno.
The scientist of the European and Russian team believes that it could be an error in reading the spectography or that they have not identified that the source of the gas is the Curiosity rover itself, since it can concentrate up to 1,000 times more methane than it could exist in the atmosphere.
Translation by Google from spanish article
Is it possible that Curiosity measured his own trace or failed at the spectrometry, as the ESA scientifist sugest, when NASA claimed they found methane on Mars?