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Predicting Contrails

  • 13-12-2010 12:43am
    #1
    Registered Users, Registered Users 2 Posts: 25,124 ✭✭✭✭


    I'm just wondering if anyone knows of any method employed by airlines to determine the likelihood of forming persistent contrails.. I've noticed a distinct increase in lingering trails which ultimately turn into cloud cover.

    I know that the Aplleman Chart can be used to predict such trails but are there any industry standard techniques used to do the same?


Comments

  • Registered Users, Registered Users 2 Posts: 701 ✭✭✭N7777G


    there were lots of lingering trails over Dublin at lunchtime on Saturday :D

    http://www.flickr.com/photos/eigjb/5251923598/


  • Registered Users, Registered Users 2 Posts: 1,787 ✭✭✭xflyer


    I doubt it somehow. What use would it be for the airlines? Contrails have no effect on aircraft in flight. It might be useful for meteorologists or others. But not airlines.


  • Registered Users, Registered Users 2 Posts: 25,124 ✭✭✭✭My name is URL


    xflyer wrote: »
    I doubt it somehow. What use would it be for the airlines? Contrails have no effect on aircraft in flight. It might be useful for meteorologists or others. But not airlines.

    Thanks. Yeah I guess it would be of very little use to airlines but just thought I'd ask anyway, I just wondered if there was a way to accurately determine where they were most likely to develop. As I said, there already is a system which can be used but it relies on data which is only available for one area of Ireland (Valentia Island) so it wouldn't really be applicable to anywhere else.

    tbh the only reason I'm interested in it is to show some posters on another forum that these persistent contrails are not chemtrails (:rolleyes:) as they assume that they're being used for some sinister purpose. If Joe Soap is able to predict the formation of trails then it may help them to realise that it isn't some insidious exercise being carried out by whoever.


  • Registered Users, Registered Users 2 Posts: 166 ✭✭TW Mr Tayto


    N7777G wrote: »
    there were lots of lingering trails over Dublin at lunchtime on Saturday :D

    http://www.flickr.com/photos/eigjb/5251923598/
    Let's play a game of spot the NAV-aid...


  • Registered Users, Registered Users 2 Posts: 9,576 ✭✭✭lord lucan


    N7777G wrote: »
    there were lots of lingering trails over Dublin at lunchtime on Saturday :D

    http://www.flickr.com/photos/eigjb/5251923598/

    I took something similar(probably the same one!!) on saturday!

    IMG_20101211_134031.jpg


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  • Registered Users, Registered Users 2 Posts: 1,787 ✭✭✭xflyer


    You'll never convince the chemtrailers. To believe that stuff in the first place you have to wired up incorrectly. I've had several run ins with chemtrailers. Leave them to it with their paranoia.

    Although we know the range of temperature and moisture conditions conducive to contrail formation. It would be hard to predict them unless you have direct measurement on the day with say a weather balloon or a weather aircraft. You could predict that a particularly day is more likely to see contrails. Today for example, looking out the window. But as North Atlantic tracks vary by the day and also flight levels depending on the position of the jet stream it's a bit of a lottery.


  • Moderators, Motoring & Transport Moderators Posts: 10,052 Mod ✭✭✭✭Tenger


    ........the only reason I'm interested in it is to show some posters on another forum that these persistent contrails are not chemtrails (:rolleyes:) as they assume that they're being used for some sinister purpose.........

    Tell them that this pic was taken over the UK, yes the Tories are spreading non-violence inducing gas over the middle classes of England......


    http://www.flickr.com/photos/tearbringer/3522895265/

    http://www.flickr.com/photos/tearbringer/3402421489/


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