[ncl-talk] divergence

[Abdoulaye SY]

Hi

I want to calculate divergence of the water vapor flux with ncl.

I use
* div    = uv2dvF_Wrap(qu,qv)            *
    and
*          dv2uvf (div, ud, vd) *where qu and qv are water vapor flux
zonal and meridional respectively.

I want to understand the Principles of operation of these functions. I have
read the documentation but it is not clear.

thanks
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