http://www.universetoday.com/36833/albed...
To see the cause of the warmth on Venus we have to look at the brightness temperature.
http://www.dlr.de/os/desktopdefault.aspx...
Remember, what someone who is untrained in the science 'thinks' isn;t always the truth.
Your "thermos bottle" effect *is* the greenhouse effect. Whatever UV and visible radiation makes it through the atmosphere (some will) will be absorbed by the surface, or by particulates in the air. The surface will warm, and will then re-radiate the heat in the infrared. Even though the surface of Venus is very hot, it can still get warmer if you irradiate it.
The lack of difference in day/night temperature, and in equator-pole temperature, is because the greenhouse effect is so strong. A world without a greenhouse effect, like Mercury, might get hot enough to melt most metals during the middle of the day, but at night it cools off to below the freezing point of water.
Heat is constantly escaping Venus. Heat is also constantly coming *in* to Venus, from the sun. But, since nothing is changing particularly, the two are in equilibrium. In other words, the amount of heat coming in is the same as the amount of heat going out.
This is not the case for the Earth. We have added greenhouse gasses to the atmosphere, so the temperature is not in equilibrium., at least not yet.
you can try re-inventing science, but I'll go with what the astronomers say.
the heat Venus captures is from the sun. without the sun it would be cold. there is no way a planet can stay warm otherwise for billions of years.
as for the little difference in day/night, the atmosphere is dense and there is wind and mixing.
the radiative properties of CO2 have been proven experimentally a long time ago and is now measured by infrared sensors on satellites. we have a measurement of incoming and outbound radiation of many planets.
you are looking more silly the harder you try to imagine away CO2. A 'themos' effect is a a good one.
Hi kano NASA states. "Even though Venus has no appreciable magnetic field, the solar wind is prevented from reaching the surface by Venus's dense atmosphere and by electrical currents induced in its conducting ionosphere. The planet has a well-developed bow shock, but it does not have belts of trapped particles. Both the ionosphere and the extended corona of hot gas, derived from the upper atmosphere, help to divert the solar wind. " http://ase.tufts.edu/cosmos/print_images... and http://www.nasa.gov/mission_pages/sunear...
Venus white atmosphere is because of the plasma created between the bow shock and the surface, it has a ionosphere that would extend down to the surface. This plasma interacts with particles emitted by volcanism and dust ions would create an affect much like a fluorescent light bulb. If you watch that video in that link I provided you will see how Venuses atmosphere works, you see the blue band that's plasma and the orange to red is heat (inferred) escaping to space Venus is not a closed system like earth. cheers
You are bizarre. The fact that the temperature does not vary much between day and night is proof that the atmosphere is holding heat; it is proof of the greenhouse effect. On planets or moons with no greenhouse effect, the temperatures differ greatly between day and night.
At the nighttime side where solar energy is blocked, energy escapes unless something holds it in.
The direction of rotation has nothing to do with temperature. There is no left-right to either heat absorbing nor heat retaining.
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Cite the astronomers. Cite the paper. Cite the journal. There is no such thing as "some astronomers". There are only real people, tell us who they are. Ancient heat would not cling to a planet any more than daily heat; places in the universe that have not energy source and nothing to retain heat are very cold. You really make no sense. The nighttime heat on Venus can only be explained by the greenhouse effect.
I'm afraid your reasoning is not quite correct.
The Venera 13 probe took images of Venus's surface. The fact that cameras took images demonstrates that sunlight does penetrate Venus's atmosphere and arrives at ground level. The actual figure is about one-sixth the intensity arriving on Earth's surface.
It seems to me that you give a bunch of evidence for Venus having an atmosphere dominated by the greenhouse effect (small difference between day and night, equator and pole) and think that is evidence against it.
My initial reaction was ''Is the Pope a Catholic?''
However, you ask a fair question and deserve a better answer than that. I'll have a go in a day or so when I can get back to my computer.
I have been asked to explain why i think Venus does not have a greenhouse effect.
try this link http://www.universetoday.com/22577/venus...
Honestly I don't understand why there are so many people who come here that can't do a simple web search.
This forum is about Earth, not Venus
I have been asked to explain why I think Venus does not have a greenhouse effect.
lets recap on greenhouse effect, solar rays striking earths surface warm it (that's why it is warm during daytime and cold at night), this warmth is irradiated into space through the atmosphere, where CO2 reacts with the long wave radiation and send some back to earth.
Venus however has a temperature of 737K in the daytime (a solar day 116 earth days long) and it has a might time temperature of 737K so obviously the surface is not being heated by solar radiation, therefore no greenhouse effect it is what I call the thermos effect (no heat coming in no heat going out)
Why is Venus so hot, well the process of planet formation cause extreme heat, and also Venus rotates on it's axis the wrong way, so it might have been involved in a collision with another body.
to control sun light
