Mecury has no atmosphere
Venus ~ 60-80 degrees C
Partial Pressure of carbon dioxide = 95 bar or 9.5MPa which is 18 doublings of carbon dioxide compared to Earth
Mars - ~ 28-36 degrees C
Partial Pressure of carbon dioxide = 0.6kPa which is 4 doublings of carbon dioxide compared to Earth
http://en.wikipedia.org/wiki/Mars
Titan - ~ 30-40 degrees C
Due to 5% methane, rather than carbon dioxide.
http://en.wikipedia.org/wiki/Titan_(moon...
Pluto - ~ -18 degrees C
Pluto is too cold for carbon dioxide to be a gas
Our earth did have the same atmosphere as Venus and Mars, the difference being our planet is in the goldilocks zone, not too near or too far from the sun, not to big or too small, with an axis tilt that causes seasons and evens out temperatures, this allowed life to start and evolve (cyanobacteria etc) which used the CO2 in photosynthesis and produced our oxygen and reduced CO2 to starvation levels.
Your starting situation is incorrect you cannot increase CO2 without reducing some other gas (oxygen) but if you did presumably the same would happen again, life would start and in about 3 billion years the earth would return to similar conditions as now.
Earth is the way it is because 1 AU is the right distance from our star to keep water in a liquid state, which allows water to exist in 4 different states, Liquid, Gas, Solid and Clouds all of which release and absorb energy during each transition phase and is the reason why earth is the way it is. Your question cannot be answered accurately without knowing climate sensitivity which appears to be much lower than what is generally accepted. With climate sensitivity set much lower CO2 is saturated at 100 PPM or even lower and does not make any significant difference as long as the oceans continue to pump H2O into the atmosphere, otherwise the earth would have become like Venus when CO2 was over 7000 ppm before life emerged. Negative feedback's generally are ignored by AGW advocates but the Paleo record proves that water vapor and its negative feedback's are equally as influential if not stronger than positive feed backs.
Hi Chem Venus and Mars are different then Earth because they are not a closed system. The energy created at the Bow Shock and Ionosphere is not transported to the core like Earth does because of their weak magnetic field lines (No internal dynamo effect) Earths strong magnetic fields create the greenhouse effect on the night side and we only out gas at the poles. There would be NO water on Earth if not for our closed system created by our electromagnetic fields Other things to look into is distance from the sun and rotation. The sun is earth's power supply and earth acts like a capacitor and releases it's energy through point charge at the surface to the atmosphere. http://ecee.colorado.edu/~ecen3400/Chapt...
If I'm understanding you correctly, we are looking at changes to the Earth's atmosphere of about 2 orders of magnitude difference in total planetary mass of CO2 up or down. Venus-like would add about 90 times our current atmosphere's worth of CO2, as the pressure is 93 bar at surface, and the air is 96.5% CO2. For Mars, the atmosphere is about 1% (~0.65%) as dense as ours, and it's about 95% CO2, so our current atmospheric density would stay about the same, but the CO2 would be reduced by 99+%.
I'll let someone else get best answer by doing the calculations (heh, d/dx springs to mind!) but it seems clear that in one case, the average surface temps would be in the area of 200C to 400F or so, and in the other case, the temps would be about -15C, close to 0F.
You have very thought provoking question. Following are my take offs.
1.CO2 density changing is atomic rearrangement.This could be isotope of CO2 or similar molecular re engineered. Nano tachnologically we will be nearing to Mars . Superimpostion of gravity will make the partial pressure of new CO2 molecule same as on earth.So the question boils down to Human race and plants , living beings adjusting to new CO2 molecule and its physiological pathways.We may need to work out different molecule of Hemoglobin which will keep the body metabolism in balance.
2.Atomic or precisely Quantum mechanics will change atomosphere.This could have totally different effect on Green house Emissions.I imagine it will worsen.
3.Plants may survive and photosynthesis process will chnage .This will obviously affect O2 in atomosphere and hence people living at heights will have more problems.Probably everybody may have to carry O2 cylinder till 100s of years to survive.
4.Water will not change substantially and We will be able to drink it.
I need to read futher Physics of the Future by Michio kaku to improve upon.Thanks
By mass iron (FE) would be a hella of a big consideration. But you want to hear what you want to hear.
Actually a imaginative question.
So you don't think redux actions can contribute to atmospheric potentials? As Artie would say; Verly interesting.
Your set in stone almost all Alarmist are.
As the most Earth-like non-Earth planets we can meaningfully observe, comparisons to Venus and Mars come up a lot in discussions of global warming. But, the two planets have *very* different atmospheres from Earth, so it's hard to make meaningful comparisons.
If you changed the CO2 composition of Earth to match Venus and Mars in terms of density of CO2, without changing any other atmospheric components (that is, you kept the density of nitrogen, oxygen, etc. exactly the same), what would the resulting atmospheric percentages of CO2 be? And how would these likely affect the planet overall? What if you did the same for all greenhouse gasses other than water vapor?
Note, I'm asking about *density* of CO2, not atmospheric percentage. Venus has a much denser atmosphere overall than Earth, while Mars's atmosphere is much less dense.
