Posted on 03/08/2008 12:09:05 PM PST by Exton1
Thank you. Off-topic and global warming aside, all the talk of terraforming Mars to an Earth-like state conveniently ignores its mass, and thus its ability to hold on to an atmosphere useful to us.
Anthropogenic global warming is a scam. The theory exists outside of fact. Using Mars to dispute it is factually incorrect as well.
.3% CO2
incorrect
earth’s atmoshpere is .038% CO2
There aren’t enough people and sheep to cut farts and keep the methane comin’!
The Mars atmosphere is about 7 millibars of pressure, about the same as the atmosphere of Earth at 100,000 feet. Remarkably, the temps of Mars are very similar to Earth temps at 100,000 feet.
Yep, even at 95% Mars has only about 57 pascals of CO2 partial pressure compared to 38 pascals of CO2 on Earth.
That’s probably one reason Mars is only about 60 degrees cooler than earth in spite of only getting 40% of the sunlight.
Which is to say this statistic doesn’t in any way disprove global warming.
Doesn't it also not have a very strong electromagnetic field, which allows the sun's radiation to "burn off" much of its atmosphere? Or are we kinda talking about the same thing?
Confession - I'm a CPA not a scientist (or is that obvious?).
I think it’s magnetosphere is very weak, relatively, to the rest of the planets in our solar system. With exception of Mercury and Pluto(now a comet?). It’s simply not big enough to compare to Earth.
I was thinking the same thing,I would say how werid but were talking about AlGore right.
In essence, Mars has no atmosphere. It boils away because there is not enough gravity to hold it in place.
Let’s throw Venus on the table too which is about 96% CO2 as well but has a surface temperature of 450C (435C more than Earth.)
It is clear that density of the atmosphere is more relevant than the percentage of CO2 or even the total amount of C02. Venus has about 250,000 times more CO2 by weight than Earth and the overall pressure at the surface is 92 times that of Earth.
Venus’s CO2 would equate to about 15 doublings that of Earth so the surface temperature should only be about 22C to 67C higher than Earth according to global warming theory (versus the actual 430C.) So Hansen’s global warming theory does not work for Venus either.
http://www.astronomynotes.com/solarsys/plantblb.htm
There are no SUVs on Mars.
It’s truly been like the Twilight Zone for the last three years or so.
“In essence, Mars has no atmosphere. It boils away because there is not enough gravity to hold it in place.”
I’m not so sure. Mars has roughly 50% the diameter of the Earth, and the moon of Saturn, Titan, has roughly 40%. Assuming their masses are proportional, Titan with less mass than Mars holds a thick atmosphere.
Graham Hancock addressed the issue of Mars losing it’s atmosphere in his book, “The Mars Mystery”. One possibility is that Mars’ atmosphere (and possibly its oceans) were blasted away by a huge impact by another body. There’s compelling geologic evidence for this as well.
Mars has nearly no atmosphere. It could support a somewhat heavier atmosphere where H2O and CO2 might have a slight greenhouse effect.
If you don’t concur with the gravitational measurements. That is on you. Give me one reason to doubt them.
“If you don’t concur with the gravitational measurements. That is on you. Give me one reason to doubt them.”
I really don’t understand your comment. I’m merely raising a point that I’m not sure about myself.
I did a quick lookup on Wikipedia and Mars has a mass of 6.4 x 10^23 kg and Titan has a mass of 1.345 x 10^23 kg.
The Wikipedia entry also lists the escape velocities for the two bodies, and Mars is greater, as would be expected. Mars, then, in theory, should have a greater ability to retain an atmosphere.
I’m not a planetary science expert and I am not trying to play “gotcha” on discussion threads. Please correct me where I’m wrong or enhance my knowledge.
Thanks
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