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Thread: Coriolis effect

  1. #1 Coriolis effect 
    New Member narwhalface's Avatar
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    I'm in my first year of studying Oceanography at uni, and I have my earth + ocean systems exam soon. I have to learn about the coriolis effect but there's one thing I don't understand.

    Now I understand that an object moving towards the equator in the Northern hemisphere appears to be deflected to its right, and that an object moving towards to equator in the Southern hemisphere appears to be deflected to its left. I understand that that happens due to the relative rotation of the Earth beneath it.

    What I don't understand is why an object moving towards the North pole in the Northern hemisphere appears to be deflected right. Surely, due to the fact that the Earth is rotating eastwards beneath it, it should appear deflected to the left? Same with the Southern hemisphere - surely an object moving towards the South pole should appear deflected to the object's right? Please can someone explain why it's the other way round?

    Sorry if this is long and rambly or doesn't make sense, but I've been trying to understand this for hours :/

    And I'm a newbie so hello


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  3. #2 Re: Coriolis effect 
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    Quote Originally Posted by narwhalface
    What I don't understand is why an object moving towards the North pole in the Northern hemisphere appears to be deflected right. Surely, due to the fact that the Earth is rotating eastwards beneath it, it should appear deflected to the left?
    In the Northern Hemisphere, the North moving object would start with the Easterly vector of its surface launch point, which is higher than the Easterly surface vector of any point to its North. This gives the object an apparent curve to the right.


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  4. #3  
    New Member narwhalface's Avatar
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    What's an Easterly vector?
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  5. #4  
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    Quote Originally Posted by narwhalface
    What's an Easterly vector?
    I should have said, Eastery movement vector.
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