Yongpeng Sun-Tastaufen
BANNED
- Joined
- Oct 15, 2017
- Messages
- 28,401
- Reaction score
- -82
- Country
- Location
About 0 to 3 °C, depending on the location. Even less in places where sunlight is scarcer, like the Poles.
The answer to the question is that Venus generates the strongest greenhouse effect in the Solar System. It actually suffered a runaway greenhouse effect early in its life. Current hypothesis is that billions of years ago Venus's atmosphere was much more like Earth's than it is now, and that there may have been substantial quantities of liquid water on the surface, but after a period of 600 million to several billion years, a runaway greenhouse effect was caused by the evaporation of that original water, which generated a critical level of greenhouse gases in its atmosphere.
This explains why Venus is a lot hotter than Mercury for example. Mercury is the closest planet to the Sun, and receives 4 times more sunlight than Venus does. Yet, the maximum surface temperature there is 427 °C, while Venus sits at 462 °C.
Now, regarding Jupiter, no. More pressure - while somewhat intuitive - is not the answer here. Read this for reference.
There's nothing that special about Venus. Mars also has 95% CO2 in its atmosphere. Actually, most planets are CO2 rich. Earth being a rare planet that has low CO2 and therefore can support life. The only reason IPCC cites Venus is to scare people CO2 causes global warming which is proven false. Correlation is not causation.
This explains why Venus is a lot hotter than Mercury for example. Mercury is the closest planet to the Sun, and receives 4 times more sunlight than Venus does. Yet, the maximum surface temperature there is 427 °C, while Venus sits at 462 °C.
And Mercury don't have the high pressure Venus has. Surprise surprise.