Weird how the tops of mountains are cold when heat rises

And they’re closer to the sun

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Probably just massive government recording devices.

Pfft, as if “mountains” are real

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OK I’ll rise to this. Air doesn’t absorb solar radiation very efficiently. The atmosphere is generally heated by the black body radiation of the Earth, which absorbs the solar radiation and then reemits it at a different frequency. Also the air is thinner at altitude which makes it cooler too.

Fwiw this is basically the question asked by a kid in a Guardian feature a few years back where they’d get a famous person to answer the kid’s question. In that instance it was Ranulph Fiennes and he didn’t have any idea what the answer was, but they still published it.

Also heat doesn’t rise, hot air rises, and then cools.