“there is almost NO difference between Earth and Venus when it comes to atmospheric temperature, even though Venus has an atmosphere composed almost entirely of CO2. ... The temperature of Venus at 1000 millibars is 339 Kelvin (66 C).” (1000 millibars = temp at the surface).
There is no way that Venus has a balmy surface temp of 65.8 degrees Fahrenheit. This guy must have done his “math” in the 1950s when 65 degrees at surface was believed to be correct.
Kelvin measures temps in relation to absolute zero, while Celsius measures in relation to the freezing point of water.
His “math” is BS:
“There are many geophysical similarities between Venus and the Earth. Average temperature is not one of them. Where the Earth has an average surface temperature of 14 degrees Celsius, the average temperature of Venus is 460 degrees Celsius. That is 410 degrees hotter than the hottest deserts on our planet.
The temperature on Venus does not vary like it does on our home world. It is 460 degrees day or night, at the poles or at the equator.”
(733.15 degrees Kelvin = 460 degrees Celsius, or 860 degrees Fahrenheit).
http://www.universetoday.com/14306/temperature-of-venus/
“And so today we have a carbon dioxide atmosphere on Venus which is 92 times more dense than Earth’s atmosphere at the surface.”
http://www.universetoday.com/22577/venus-greenhouse-effect/
Proximity to the Sun does not account for the radical differences in surface temperatures. Nor does the Earth have surface pressures anywhere near that of Venus, being the equivalent to that found a half mile beneath the ocean. This guy makes some simplistic adjustments to various known numbers, then composes some formula out of his head to produce the result he desires.
Due to it's parabolic orbit, the Earth is closer to the SUN in WINTER (for North America anyway) and further away during the SUMMER.
I think there’s some confusion here. The original post was referring to the similarity of temperatures (allowing for distance from the sun) of the two atmospheres at the same pressures, not at the planets’ surfaces. 1000 millibars is the pressure at the surface of the Earth, but that pressure exists in Venus’s atmosphere at 50-65 km above the surface. The temperature at that altitude is what is being compared to the temperature of the atmosphere at Earth’s surface, not the temperature at Venus’s surface.
[[It is 460 degrees day or night, at the poles or at the equator]]
Sooooo you’re saying there’s no need for ovens any longer? Woohoo- ovens are energy hogs- We can bake our turkeys outside for free now!