It is common knowledge that a vast quantity of the Earth's surface heat comes from within the Earth. Have you ever bathed in a hot spring, or buried your face in the lawn on a hot day?
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Mount St. Helens disproves your point very easily.
http://www.skimountaineer.com/CascadeSki/CascadeSki.php?name=StHelens
If the Earth is the source of most of the surface heat then any place there is an active volcano, which funnels heated rock directly to the surface, would have extremely warm surface temperatures all year round even if the volcano was dormant.
The image of Mount St. Helens prior to it's eruption, however, shows that the mountain is covered in snow, indicating that the rock is cold even though there's lava several miles below it. Yet in areas with almost NO volcanos, it's very hot anyway yet cooler than in the shade.
I'm sorry James but either you're delusional or, more likely, one of the best trolls here. In either case, I'm crossing you off my list of "True Believers".
Also, every person on Earth has seen that the long winter nights correspond with the coldest weather of the year, and the hottest days correspond to the shortest nights. And you will heat any surface that withstands direct sunlight, while the same surface will be less hot if kept touching the ground, under a big roof.
And finally, James is not trying to explain a small discrepancy in the amount of heat received from the Sun. For his "hypothesis" to be right, he would have to explain that the Sun can burn for at least 650 million years, not just a few years, as he can currently explain. If the Sun can last that much time more, then the amount of energy produced has to be, at most, (6.8 hours / 650 million years) aprox = 10
-12 of the total of the energy calculated by ClockTower.
To make this clear for those who do not want to understand numbers: If all the energy that heats the Earth came from the Sun, the Sun could only last a trillionth of the time we know it has lasted. If we disperse the Sun's heat so that it lasts what it know it has lasted, then the Sun would only be able to give a trillionth of the energy we receive on the Earth's surface, so getting sunburned would be easier with a flashlight from a kilometer away than from the Sun.
When your numbers are so out of whack (in this case by a factor of one trillion) you cannot correct your hypothesis by tweaking the variables a little bit. You are totally dead in the water.