Re: About stream function and velocity potential

From: Dennis Shea (shea AT cgd.ucar.edu)
Date: Wed Jul 28 2004 - 09:08:03 MDT

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    > I have calculated the stream function and velocity
    >potential with the NCL function uv2sfvpf(), but when I
    >try to understand the results, I'm puzzled because the
    >divergence corresponds to positive velocity potential
    >and positive corresponds to negative stream function.
    >
    >Here, I want to know that whether the above results
    >are rational or not. And furthermore, whether the
    >formulas for stream function(psi) and velocity
    >potential(phi) are u=-@psi/@y-@phi/@x and
    >v=@psi/@x-@phi/@y respectively or not.

    ---
    >Sorry, my results mentioned in last email are
    >convergence corresponds to positive velocity
    >potential and positive corresponds to negative stream
    >function.
    ----
    

    The signs for velocity potential and stream function are as returned from the spherical harmonics.

    http://www.cgd.ucar.edu/csm/support/Data_P/

    Click on: Divergent & Rototational Wind

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