frigidweirdo
Diamond Member
- Mar 7, 2014
- 50,349
- 12,236
- 2,180
The first point is I wasn't comparing Venus with the Earth. I was comparing Venus with Mercury.
The point being that Mercury hardly has an atmosphere, heat hits Mercury's surface and then bounces right out of there. On Venus it doesn't happen.[/qipte]
You don't think that mercury, due to its proximity to the sun absorbs energy?....and I don't guess you are aware that the albedo (doubt that you even know what the word means) is 0.75...a mirror that reflects perfectly would have an albedo of 1....care to hazard a guess as to what that means?....only 25% of the energy coming in from the sun actually penetrates the atmosphere of venus...the rest is reflected...that is why venus is so bright in the sky... earth;s albedo, by contrast is about 0.31 meaning that almost 70% of the light coming in from the sun penetrates the atmosphere.
No Greenhouse Gases? Uranus is blue because of Methane. The outer layer of the planet. Very little of Uranus's heat gets out.
You really don't spend much time actually thinking....do you. You grab on to random facts and then assume that you know what you are talking about.
Lets begin with the fact that uranus is 17 times more distant from the sun....that means that it gets very little energy from the sun....then there is the fact that the composition of the atmosphere of uranus is 83% hydrogen...15% helium....and 2% methane....then there is the fact that the albedo (remember that word) of uranus is 0.51 which means that only 49 % of the energy of the sun which is 17 times further away than earth actually penetrates the atmosphere....
The average temperature of Uranus is -200 Celsius. It doesn't have a proper surface like those planets closer to the sun, so it's different to measure this stuff anyway. Uranus's core is not as warm as other planets at 5000 K, which is colder than the Earth's which is about 6000K.
So saying Uranus is warmer at the bottom of its troposphere is a little weird
And yet, it is true...and it is not due to any greenhouse effect...it is due to the density of the atmosphere... As to the temp of venus at the same atmospheric pressure of earth...here, have a look. The altitude at which the atmospheric pressure on venus is about 55Km....look at the temperature there...around 292K
that is about 18.8C....then compensate for the difference in incoming radiation because venus is closer to the sun and you end up with a temperature of about 16C which is about the temperature here on earth... A CO2 induced greenhouse effect is nonsense and it does not exist...the observed facts prove this true.
![]()
If you're going to start being nasty, I'm not going to bother. You want to tell me I don't spend too much time thinking, that's your problem, but it's an attack.
So how about this. You format your post so I can actually read it properly, and you change it to take out the attacks, and then I might respond to it.
But if you want your response to include attacks instead of debate, that's fine, you don't get a proper response from me.