Largest Methane Spike Ever, Curiosity Rover to Examine it Further |
Largest Methane Spike Ever, Curiosity Rover to Examine it Further |
Jun 22 2019, 05:09 PM
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#1
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Junior Member Group: Members Posts: 68 Joined: 27-March 15 Member No.: 7426 |
It's been reported today that a release of methane on Mars, three times larger than ever detected before, was discovered on Wednesday. On Friday the Curiosity rover had its plans altered, in order to concentrate on this phenomenon, it's said. Preliminary results of this investigation are expected on Monday. Further information is available in the article, linked below:
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Jun 22 2019, 05:26 PM
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#2
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741 |
What about trace gas orbiter? Insight should also detect tectonic activity if the methane has a geological source. In the absence of any activity, it may be interpreted as boosting the idea of methane arising from a biological source.
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Jun 22 2019, 07:40 PM
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#3
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
Nice thought, Julius, but I'd say "could" rather than "should." Gas release could be arbitrarily gentle. We're talking about an unknown phenomenon so it's impossible to nail down the details. This could even be a chemical release from a source with a geological origin. But, yes, certainly some kinds of gas release would have a seismic parallel, and having the ability to check that is a wonderful capability.
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Jun 22 2019, 10:52 PM
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#4
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
Gas release could be arbitrarily gentle. (snip) This could even be a chemical release from a source with a geological origin. Thinking along similar lines, estimates suggest the Gale crater could have punched as deep as 17kM deep, compared to ~11kM for the Marianas Trench. On Earth, that is easily deep enough for some really unusual physical chemistry, e.g. methane clathrates and subsurface pools of liquid CO2
Lakes of liquid CO2 in the deep sea https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1599885/ So, there's a fair chance that this could be related to the breakdown of methane clathrates, aka "Burning Ice", which then collect and follow the many deep fractures likely created by the Gale impact. |
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Jun 23 2019, 06:29 PM
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#5
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Regarding the brainstorming about the origin of the CH4, I've two almost entirely different lines of thoughts or questions:
1. Have exogenic causes been ruled out? I'm thinking of CH4 bearing cometary remnants. Impacts would be seasonal, when Mars would cross the orbit of the debris. They may cause local peaks of trapped gasses. and 2. May the local clay be able to trap CH4 of an ancient CH4 atmosphere, and release traces of it during summer? Methane is a well-known strong greenhouse gas, and assuming an ancient CH4 atmosphere reminiscent of Titan may help to resolve the faint young Sun paradox for Mars. |
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Jun 23 2019, 09:09 PM
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#6
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
If it was a regular meteor shower the orbiters would have noticed an increase in dust impacts, wouldn't they? There also doesn't seem to be a regular pattern of when the spikes occurred during the Martian year, and Curiosity has been watching for several of them so far.
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Jun 23 2019, 11:58 PM
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#7
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Similar attempts to correlate presumed methan spikes with meteor showers have been attempted or suggested before, see for instance the two articles
- A cometary origin for martianatmospheric methane: QUOTE The areal extent of meteor showers is in agreement with the areal extent observed for martian methane plumes. Meteor showers typically peak over a course of hours, depositing material onto an area that can be sub-hemispherical in extent (Jenniskens, 1995), which is in agreement with the size of the Mumma et al. (2009) plume. - TESTING THE MARTIAN METHANE FROM COMETARY DEBRIS HYPOTHESIS: THE UNUSUALLYCLOSE 24 JAN 2018 INTERACTION BETWEEN COMET C/2007 H2 (SKIFF) AND MARS. And there is a long list of candidate small bodies. So, I was wondering, why this approach doesn't appear to be mentioned in the article linked to in post #1 of this thread. A possible reason would be an analysis that escaped my notice. |
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Jun 24 2019, 03:58 PM
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#8
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Junior Member Group: Members Posts: 68 Joined: 27-March 15 Member No.: 7426 |
What about trace gas orbiter? Insight should also detect tectonic activity if the methane has a geological source. In the absence of any activity, it may be interpreted as boosting the idea of methane arising from a biological source. This linked article from Nature explains that the Trace Gas Orbiter has not detected methane anywhere on Mars, so far, but is now directing its gaze at the site of the latest spike, in Gale crater. ESA's Mars Express, the other orbiter capable of detecting methane, is also looking there, it's reported. The article also quotes one of the scientists in charge of the methane-detecting instrument on Curiosity, as calling the methane spike 'excitingly huge'. No word, yet from NASA, about the results of this weekend's investigations. link |
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Jun 24 2019, 04:13 PM
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#9
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
It would be interesting to know if SEIS on InSight captured any possible tremors shortly before this event, but it's possible that the recent mole recovery efforts may have introduced too much noise to make detection of such a signal unambiguous.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Jun 25 2019, 01:24 AM
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#10
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
...and it's gone.
https://twitter.com/Shamrocketeer/status/1143312546717261824 . QUOTE @MarsCuriosity SAM instrument PI Paul Mahaffy confirms to #AbSciCon2019 that a ‘plume’ of methane at 21 ppb was seen last week, disappeared over the weekend.
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Jun 26 2019, 06:01 PM
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#11
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Junior Member Group: Members Posts: 68 Joined: 27-March 15 Member No.: 7426 |
There's an outside chance that the Mars Express Orbiter caught the methane spike, too. It will apparently be some time before it downloads its data to Earth.
It's reported that the Trace Gas Orbiter could use a methane spike of this concentration (~20 ppbv) to distinguish between carbon 12 and carbon 13. An unexpected excess of the lighter isotope could argue against geological and astrophysical explanations. |
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Guest_Steve5304_* |
Jul 19 2019, 05:53 PM
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#12
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Guests |
Wild speculation:
Could it be stowaway crap from earth that got lucky? Bacteria evolve really quick. |
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Jul 19 2019, 08:34 PM
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#13
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Member Group: Members Posts: 401 Joined: 5-January 07 From: Manchester England Member No.: 1563 |
Life, as they say, finds a way.... but IMHO it's not likely on the Martian surface thanks to the sterilising action of the UV content of the Martian sunlight. And you'd need water to be present on or near the rover: It's not totally impossible across the whole range of Martian conditions for small amounts of liquid h2o to exist, but unlikely. Unless anyone can think of a way in which the presence of the rover might generate more favourable conditions for the formation of small amounts of liquid water, or act as such a favourable environment itself, I would comfortably dismiss the idea on those grounds alone, cool though it would be to colonisation fans.
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Jul 19 2019, 09:45 PM
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#14
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
And a reminder to all to read & heed rule 1.3.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Guest_Steve5304_* |
Jul 21 2019, 05:05 PM
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#15
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Guests |
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