Bob Howard SEZ -
> Asphalt paving was slippery wherever I drove. Does anyone know why
> that should be? The earth is not frozen and air temp had not been below
> 32 for several days.
Some times, if there are no clouds, cold objects will actually
radiate enough heat into the atmosphere to lower their temperature
below that of the surrounding air. That's why you can have frost
on a windshield when there's no frost on the ground. Seems
counterintuitive, but I've heard it on good authority. Something
to do with radiant versus conductive versus convective heat exchange.
Maybe someone more versed in thermodynamics can explain it better.
Here in the Puget Sound area we've had a very nice indian summer,
but the weather seems to have finally turned last week. Of
course, my MGA still isn't on the road. We'd better have a
nice spring...
--
David Breneman | "Before there were CDs there were
Distributed Systems S/W Analyst | records, and before there were
Airborne Express, Inc. | records, there were 78s."
david.breneman@airborne.com | --- Seen on eBay
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