‘Inversion‘ is a meteorology phenomena in my area in Switzerland: typically the air gets colder the higher you get up in the mountains. But under special conditions during Fall/Winter time, it is possible that cold air is on the ground, and it is warmer in the higher mountain areas. To the point that the valleys are filled with fog (‘sea of fog’).
Below is such a ‘sea of fog’, seen from the top of the Wildspitz mountain, view to the South and center of the Swiss Alps. The look was probably similar 10’0000 years ago during the last Ice Age.
If there are stable weather and no mixing of the air, it can stay for many days and weeks that way.
But that ‘sea of fog’ can get very dynamic too, and waves going up and down. The video from Cornel Suter shows this very nicely:
Happy Inverting 🙂