Here's another gratuitous definition. People will ask 'What exactly is a heat dome?" And the weather guys just define it by the obvious effects, and not the mechanism.
The physics definition is 'stagnant air'. It is the default when you take away the powerful ocean breezes or plumes. We just have a solar oven, which is fun to do when camping. Mix a high, hot sun, with no breeze, and you get a stew of hotness.
They also throw in the Jet Stream, which is just an effect of hot and cold bodies of air meeting. They talk like it's an AI that's going to take all our jobs.
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