CDO

Dear all,

I computed the wind divergence of a low-level wind field, using uv2dv. I used the same procedure that I had used to compute the same quantity on many other data, which always looked fine to me. However, when applying the same script to another model data set, the sign of the resulting field looks odd. When plotting the wind fields vectors with the divergence field, I'm pretty sure, that my script gives divergence where the vectors converge and vice-versa.

The only difference I could spot in the data is that the lat axis is defined as -90...90 for the one file, but 90...-90 for the other. I would have expected, that cdo reads the axis data from the nc-file when computing the derivatives. Am I wrong with this, and might this cause a wrong sign for the divergence in the end?

Thanks and have a nice christmas,
Ralf