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Jet Stream thing in Dublin Sky

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  • 08-06-2006 1:23am
    #1
    Turlock
    Registered Users Posts: 240 ✭✭


    Just wondering what the deal is with the jet stream thing in the sky, FM104 were talking about it.

    Had a look out and it looked a bit too tidy to be a random cloud :eek:


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    #2
    Heyes
    Registered Users Posts: 2,203 ✭✭✭Heyes


    am'nt i lucky i cant even see a cloud in the sky :rolleyes: :p


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    #3
    nesf
    Registered Users Posts: 27,645 ✭✭✭✭nesf


    Moved to Dublin.


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    #4
    Pherekydes
    Registered Users Posts: 16,164 ✭✭✭✭Pherekydes


    nesf wrote:
    Moved to Dublin.

    Not weather?


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    #5
    monkeyfudge
    Registered Users Posts: 23,216 ✭✭✭✭monkeyfudge


    Eh... might it have been a jet stream?


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    #6
    The Hill Billy
    Registered Users Posts: 22,775 ✭✭✭✭The Hill Billy


    A condensation trail is the correct term.
    A jet stream is not a "cloud" or otherwise visible weather phenomenon.

    Jet Stream is described by answers.com as:

    ...narrow, swift currents or tubes of air found at heights ranging from 7 to 8 mi (11.3–12.9 km) above the surface of the earth. They are caused by great temperature differences between adjacent air masses. There are four major jet streams. Although discontinuous at some points, they circle the globe at middle and polar latitudes, both in each hemisphere. The mean position of the stream in the Northern Hemisphere is between lat. 20 and 50 degrees N; the polar stream is between lat 30 and 70 degrees N. Wind speeds average 35 mi (56.3 km) per hr in summer and 75 mi (120.7 km) per hr in winter, although speeds as high as 200 mi (321.9 km) per hr have been recorded. Instead of moving along a straight line, the jet stream flows in a wavelike fashion; the waves propagate eastward (in the Northern Hemisphere) at speeds considerably slower than the wind speed itself. Since the progress of an airplane is aided or impeded depending on whether tail winds or head winds are encountered, in the Northern Hemisphere the jet stream is sought by eastbound aircraft, in order to gain speed and save fuel, and avoided by westbound aircraft.


    More info than you probably needed though...


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    #7
    BendiBus
    Closed Accounts Posts: 2,074 ✭✭✭BendiBus


    Could it have been the CIA spraying us with mind altering drugs? Google for chemtrails ;)


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    #8
    The Hill Billy
    Registered Users Posts: 22,775 ✭✭✭✭The Hill Billy


    BendiBus wrote:
    Could it have been the CIA spraying us with mind altering drugs? Google for chemtrails ;)

    Sweet Jebus!
    I've just had a quick scan through the first five sites returned - have these people nothing better to do?:confused:


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    #9
    Riamfada
    Registered Users Posts: 10,246 ✭✭✭✭Riamfada


    woo woo woo,slow down there. Whats a plane now?


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