'ave' zonal average PROBLEMS!

[Diane Stokes]

Hi, Thomas.

The "-b" option works as advertised for me (using v1.9b4).

If you are still having this problem, posting your data descriptor file
might get a better response. (The output from 'q config' and your
platform info sometimes helps, too.  I don't know if it will in this case).

    Diane

Thomas Spengler wrote:
> Dear all,
>
> I am using the function 'ave' to calculate zonal means of different
> variables.
>
> If you average over a latitude circle, following the documentation, you
> should do:
>
> ave(z,lon=0,lon=360,-b)   (1)
>
> right?
> The '-b' option enabling the weighting of the longitude '0' which is
> included twice in the zonal average here.
>
> Expression (1), following the GrADS documentation, should be identical to
>
> ave(z,x=1,x=180)   (2)
>
> right?
>
> The problem ist though, that this is not the case! I get deviations of
> the two results reaching 350 m^2 s^-2.
> Does someone have the solution for calculating real, consistent zonal
> averages with GrADS?
> Or am I doing something wrong or didn't understand the documentation
> properly?
>
> Thanks in advance for your help and advice!
>
> Cheers,
> Thomas
>

--
Diane Stokes
Environmental Modeling Center
National Weather Service/NOAA