No methane detected in 2012-2013 by Curiosity/MSL

1 | 2 Next
Author Message
Dana Johnson







PostPosted: September 20, 2013 3:11 PM 

Can the prior measurements of methane from Earth be inconsistent with the rover equipment measurements, or is there a problem with the methods used in the Earth based techniques?

http://www.nasa.gov/press/2013/september/nasa-curiosity-rover-detects-no-methane-on-mars/#.UjyZCIQo5qM

Dana Johnson


Posts: 1195

Reply: 1



PostPosted: September 20, 2013 3:48 PM 

The rover has traveled only a short distance towards Mt. Sharp, but the methane checks are claimed to be a broad, planet-wide, measurement of the gas from my recollection of prior news releases and articles.
If localized releases are distributed broadly as claimed in a short time, these local results deny prior findings.

Traverse to Mt Sharp plotted as of Aug 27.

http://mars.jpl.nasa.gov/msl/multimedia/images/?ImageID=5533

Barsoomer


Posts: 344

Reply: 2



PostPosted: September 20, 2013 3:56 PM 

http://www.nature.com/news/missing-methane-gas-mystifies-mars-scientists-1.13779

According to the above, they haven't yet tried the more sensitive approach where they first remove the CO2 in order to concentrate the remaining gasses.

The possibilities seem to be:

1. The previous measurements were in error, as maintained for some time by Zahnle.

2. The releases are episodic/infrequent PLUS there is some mechanism that destroys the CH4 much more rapidly than current models can explain.

LWS


Posts: 3062

Reply: 3



PostPosted: September 20, 2013 6:57 PM 

Barsoomer; Wonder why there couldn't be another possibility; The Curi measurements are in error? for completeness only.

Winston

Barsoomer


Posts: 344

Reply: 4



PostPosted: September 20, 2013 11:38 PM 

Winston, good point! Yes indeed, SAM may have some fault that is affecting its ability to sense CH4. For example, the initial "overload" of methane carried from Earth may have upset the calibration.

John


Posts: xxx

Reply: 5



PostPosted: September 21, 2013 12:47 AM 

Meebee the gases are stratified. CH4 has a much lower specific gravity than CO2.

Kevin


Posts: xxx

Reply: 6



PostPosted: September 21, 2013 7:04 AM 

I think MSL is a fair distance from the source and yes John in such a thin atmosphere the methane could rise up very quickly and hang out at much higher altitudes. So far Curiosity has been deep inside Gale so even if the methane were to drift across to this area I doubt it would descend into the bowl of the crater. Perhaps if you were on top of Mount Sharpe you may get a sniff.

We really need to wait for the Trace Gas Orbiter to confirm one way or another.

LWS


Posts: 3062

Reply: 7



PostPosted: September 21, 2013 7:07 AM 

Barsoomer;
Yes, exactly what I was getting at. A reset of all the parameters related to methane detection might just do the trick. But I'm almost certain that they would have tried that already.

Winston.

LWS


Posts: 3062

Reply: 8



PostPosted: September 21, 2013 7:22 AM 

Kevin; Point well taken also from Mumma's and the others initial reports the Methane detected was episodic and possibly localized and actually not recorded since then by the various teams looking for it so it should not be all that surprising that Curi cannot find it at Gale. afai understand, Curi is only sampling an atmospheric column in its vicinity the earlier reports on significant episodic methane was planet wide. And here, your point and MPJ's point is relevant, Curi may not be in the best place to sample for methane.

LWS


Posts: 3062

Reply: 9



PostPosted: September 21, 2013 8:00 AM 

MPJ; The recent paper by Gil Levin is as usual interesting and clarifies some impressions I had about the contributions of MSL to the life debate so far

John Henry Dough


Posts: xxx

Reply: 10



PostPosted: September 21, 2013 4:36 PM 

A reminder of discussion subject..

http://exploration.esa.int/mars/48523-trace-gas-orbiter-instruments/

LWS


Posts: 3062

Reply: 11



PostPosted: September 21, 2013 5:31 PM 

JHD; Thanks

Winston

John Henry Dough


Posts: xxx

Reply: 12



PostPosted: September 21, 2013 7:42 PM 

There is no camera (per se) in this one.

Although at times can be used as a helper
to our older satellite transmitters (NASA option)

LWS


Posts: 3062

Reply: 13



PostPosted: September 21, 2013 8:08 PM 

This Space.com story seems quite balanced and informative

[link] ?cmpid=545394

Winston

John Henry Dough


Posts: xxx

Reply: 14



PostPosted: September 23, 2013 10:37 AM 

This is what I came away with,,,,,,,
from LWS response above,,

"It's difficult to know whether the null measurement from Curiosity has to do with being in the wrong place at the wrong time, or whether it is representative of Mars," Muller said.

LWS


Posts: 3062

Reply: 15



PostPosted: September 23, 2013 11:57 AM 

JHD; me too; Winston

John Henry Dough


Posts: xxx

Reply: 16



PostPosted: September 24, 2013 10:53 AM 

Trace gas detector(orbiter) to be launched soon.

http://spaceflightnow.com/atlas/av038/130805photos/

John Henry Dough


Posts: xxx

Reply: 17



PostPosted: September 24, 2013 11:48 AM 

and another thing,,,,I dont think mankind should have the adacity to define life.

Who made us Gods?

actually,,,,,,,Fear of God is the beginning of wisdom.And also,,many mansions and things I could say you could not bear them,behind a glass darkly.Many more references in the worlds oldest histories.

The greatest nation in the world has a fool for president (sigh)

Mama said there would be days like this.

Kevin


Posts: xxx

Reply: 18



PostPosted: September 25, 2013 9:16 AM 

More here:

http://io9.com/heres-why-everybody-is-freaking-out-about-methane-on-m-1355589246?utm_source=buffer&utm_campaign=Buffer&utm_content=buffer26064&utm_medium=twitter

As we have said here the source is localised and sparodic and Gale may not be close enough to it even the wind could blow it away from Gale.

John Henry Dough


Posts: xxx

Reply: 19



PostPosted: September 25, 2013 2:26 PM 

Thanks Kevin,good stuff.

To summarize:Quote from Link

.....the truth of the matter is that there's some weird-ass chemistry happening on the Red Planet that we're just beginning to understand! And that's pretty damn amazing as it is.

Barsoomer


Posts: 344

Reply: 20



PostPosted: October 1, 2013 11:52 PM 

http://www.computerworld.com/s/article/9242882/Move_over_Curiosity_NASA_plans_new_Mars_rover

Mars 2020 rover.

1 | 2 Next


Join the conversation:















Very Happy Smile Sad Surprised
Shocked Confused Cool Laughing
Mad Razz Embarassed Crying or Very Sad
Evil or Very Mad Twisted Evil Rolling Eyes Wink
Powered by MTSmileys