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B IF north pole becomes the south pole...

  1. Apr 16, 2016 #1
    what would happen if north pole of earth becomes south pole and south becomes north ?
    What would be the chenges on earths climate or any other changes ??
     
    Last edited: Apr 16, 2016
  2. jcsd
  3. Apr 16, 2016 #2

    PeroK

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    I thought the north pole already was the south pole!
     
  4. Apr 16, 2016 #3
    i edited it
    sorry
     
  5. Apr 16, 2016 #4
    It would make no difference, as far as I know. There is a period in between in which the magnetic field is reduced, which would allow more radiation to come to earth. But this has happened before many times without mass extinctions or anything like that. I think there would be some effect on climate, but I don't know what.
     
  6. Apr 16, 2016 #5
    Could you describe in detail what you mean? As the poles are defined by the rotational axis the north pole cannot become the south pole. Thus I guess you mean something different.
     
  7. Apr 16, 2016 #6
    lets just imagine for a moment .
     
  8. Apr 16, 2016 #7
    What?
     
  9. Apr 16, 2016 #8

    DrGreg

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    I guess we are being asked, what if the Magnetic North Pole moved from near the True North Pole to near the True South Pole?
     
  10. Apr 16, 2016 #9

    sophiecentaur

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    Aren't we being asked about when N and S flip and change places? This has happened already as described by Hornbein. There are strips of NSNSNSNS iron molecules to be found on the sea bead in one or more of the trenches. Don't ask me for a reference but it's well enough known to be in GCSE text books, as I remember.
     
  11. Apr 16, 2016 #10
    That's one possibility. Another interpretations would be flipping Earth's rotational axis relative to the ecliptic or flipping Earth relative to it's rotational axis.
     
  12. Apr 16, 2016 #11

    Vanadium 50

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    Since the OP refuses to ask when answered, guessing what he means is probably going to be fruitless.
     
  13. Apr 16, 2016 #12
    i mean flipping Earth relative to it's rotational axis.
     
  14. Apr 16, 2016 #13
    theres a huge time difference between the world and india so man it was night when you all were guessing. What i meant ?
    I am really sorry.
     
  15. Apr 16, 2016 #14

    davenn

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    The earths' magnetic field has flipped man y many times over the millions of years

    googling such will give you lots of hits
     
  16. Apr 17, 2016 #15
    thnx
     
  17. Apr 17, 2016 #16
    Last I heard the magnet pole was somewhere in Canada, heading on its way to Britain, is that right?
     
  18. Apr 17, 2016 #17

    davenn

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    currently under the Arctic Ocean and going by those predictions, is going to pass by the Nth Geographic Pole and across into Russia region

    magnet6.jpg


    but considering its wild motions over the last 2000 yrs,, I would be surprised if its future location
    could be calculated with any accuracy. I have seen a staggering drunk man do straighter paths :-p:biggrin:

    Magnetic_North_Pole_Positions_200AD.jpg


    Dave
     
  19. Apr 17, 2016 #18

    sophiecentaur

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    That is never going to happen and the question is a bit like the "what would happen if you took the Sun away?" type questions.
    Flipping the magnetic poles has been a common occurrence.
     
  20. Apr 17, 2016 #19

    Vanadium 50

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    Amazing. After 18 posts, we still don't know what the OP's question is. He says it's flipping the entire earth with respect to the rotational axis, someone answers as if he said flipping the magnetic poles, and he says "thanks". Well, "thnx". Apparently it's only worth 4 letters to thank us and not all six.

    In an act of reckless optimism, let me ask yet again: "What exactly are you asking?"
     
  21. Apr 17, 2016 #20
    That strongly depends on the time scale. If the process is as slowly as the normal continental drift nothing special would happen.
    Something like that already happened to Mars. The crust has been flipped relative to the axis by 20-25°. Thus the question is not as absurd as you seem to think.
     
  22. Apr 17, 2016 #21
    thanx for your replies .
    I now got my answer .
     
  23. Apr 17, 2016 #22

    sophiecentaur

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    What happens to Angular Momentum though? 20 - 25° is not a lot compared with 180°; just a tilt and who knows what was the situation just before the event?
    The core would have to be rotating much faster than it is to compensate for the 'outside bits' going in reverse.
     
  24. Apr 17, 2016 #23
    Nothing.

    Yes, of course. But it shows that such a process is possible.

    I'm afraid you have a wrong impression of the process we are talking about. The angular momentum of the crust doesn't change and therefore doesn't need to be compensated. You could even flip the whole planet upside-down without changing it's angular momentum.
     
  25. Apr 17, 2016 #24
    If we are talking of the magnetic poles shifting, nothing much would happen, and there is geological evidence of this happening before without any major consequences.
    (Perhaps the Earth would receive somewhat higher solar radiation while the changeover is in progress.)
    If we are talking of the rotational axis changing then the only way that could happen would be due to very strong gravitational interaction between the Earth and another large body, or possibly a collision.
    Since the planets in the solar system are now settled in to stable predictable orbits this isn't going to happen, at least not in any time scale relevant to humans.
    If it did hypothetically occur it would likely induce chaotic climate changes, but this would settle eventually into some kind of seasonal pattern similar to the pattern at present.
     
  26. Apr 17, 2016 #25

    sophiecentaur

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    I think you would have to agree that the total angular momentum must be unchanged if there's no external influence. So, if you want the rotation to change, how can you change the sign?

    This is what my answers are all based on:
     
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