Wuwei
Gold Member
- Apr 18, 2015
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The same thing that causes it all the time...energy flows from warm to cold. You think the sun has something to do with the direction that energy flows other than the change in temperature its energy causes? You think energy can flow from cool to warm at night when no one is looking?
You can't measure energy moving spontaneously from cool to warm because energy doesn't move in that direction. Doesn't it strike you as strange that you have no problem easily measuring energy with an instrument if the energy source is warmer than said instrument, but if you want to measure energy moving from something that is cooler than the instrument, you must cool said instrument to a temperature lower than of the energy source?
Isn't that undeniable physical evidence that energy only moves from warm to cool...you can't measure energy moving spontaneously from cool to warm because it doesn't move in that direction.
Wow, you sure are excited about a topic that is irrelevant to a cold instrument aiming up at a warmer dark sky. Your post, in so many words, said 5 separate times 'warm to cool -- good', but 'cool to warm -- bad'.
You are sure dancing away from this simple question. What causes that spectrum of the detector looking at the sky where the peaks are the emission spectra of the various GHGs??? That energy is certainly not radiating down from outer space. It's certainly not the earth in back of the detector. What is left but the atmosphere? Hmmm? Any ideas?