Subject:
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Re: Geography (was: We'll take in your poor....)
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Newsgroups:
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lugnet.off-topic.debate
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Date:
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Wed, 14 Jul 2004 03:55:59 GMT
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Viewed:
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5516 times
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In lugnet.off-topic.debate, Bruce Schlickbernd wrote:
> In lugnet.off-topic.debate, David Laswell wrote:
> > In lugnet.off-topic.debate, Frank Filz wrote:
> > > Flying against the planetary rotation might get you somewhere, I'm not sure
> > > how all the dynamics work. What I do know is that in the northern
> > > hemisphere, especially over most of the US, the jetstream is a significant
> > > contributor to West to East speed. Look at airline flight times.
> >
> > Basic physics says that if you spin the world in one direction, the air will
> > (generally) spin in the other direction (counter-rotation, equal/opposite
> > reaction and such), which should carry you even faster into the rotation and
> > fight you even harder when you chase it. Forgot about the jet streams... :)
>
> Last I remember of Halley, Hadley and Coriolis that's not how it works, but it's
> been quite some time since I last looked at that kind of thing. The basic
> physics as I remember the model is that the heated air around the equator rises
> (the doldrums, famous for heat, no wind, and lots of moisture in the air),
> dumping its moisture as it cools, breaks north and south at the tropopause,
> generally descends at Latitude 30 (the horse latitudes, where sailing ships
> dumped the dead horses they were transporting overboard because of the heat and
> lack of water - you can tell I'm one of these Pirate guys, eh?), compressing,
> heating (and causing the two bands of desert north and south along those
> latitudes), and then moving back towards the equator, which is now moving faster
> east than the air is which has slowed down to the rotational speed at the
> higher/lower latitudes, which (if I can complete this ridiculously long sentence
> made worse by these constant parenthetical remarks) appear to come out of the
> northeast/southeast due to that lag. There are two more major cells, but the
> basic concept is the same. I don't recall anything about equal/opposite
> reaction, but feel free to expand my education if I have erred! :-)
Your explanation of hot air movement and how it affects weather and climate
matches my memory of the facts a lot better than the previous hot air
explanation did. Thanks for posting that!
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