Michel
Joined: 10 Jan 2006
Posts: 966
Location: Norway
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 Posted: Sun Jan 21, 2007 2:58 pm Post subject: Inversion: WAS: Wheel Skis... |
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Lynn wrote:
| Quote: | The last 3 or 4 times that I've tried to climb to lower
temps, I have run into a temp inversion...really strange to me. Is
this normal? I
know about the 3 degrees F loss for each 1000' altitude, but
lately I haven't seen it...yesterday it was about the opposite.
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It is extremely common in my country, Lynn. During the winter, if
there isn't much convective wind, like under a high pressure, the cold
air runs down the mountains and stays in the valleys where, usually,
the airfields are. Climb up, and you'll meet warmer air.
In places like Greenland, it also causes strong winds called katabatic
winds. In Norway, it mostly creates freezing fog in the valleys. I once
observed such a fog flowing down a fjord, like a big stream. It was
very impressive and moved relatively fast.
Noel, yes freezing rain would be a sign of an inversion, i.e. warmer
air above colder air. But this kind is mostly met when a cold front is
passing.
Cheers,
Michel
do not archive
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