[ncl-talk] compute stream-function using NCL

[Min-Woo Kim]

Dear NCL experts,

For calculation stream-function using NCL, maybe there are two methods.
1st, using the ncl function "uv2sfvpf".
2nd, inverts the Laplacian from vorticity. (we can use the ncl function
"ilapsG_Wrap")

At this moment, I wonder about the stream-function definition.
* d() : partial differential, psi : stream-function
A. u=d(psi)/dy, v=-d(psi)/dx or
B. u=-d(psi)/dy, v=d(psi)/dx

If A, maximum of stream-function means cyclonic rotation.
If B, however, minimum of stream-function means cyclonic rotation.
So, it's confusing.

Thank you,
Minwoo
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