Re: COHERENS sigma to meters z coordinate

[Ansley Manke <ansley@xxxxxxxxxxxxx>]

Hi Francisco,
Welcome to Ferret!  There is a method to replace the Z axis
and convert from sigma coordinates to depth.  There is an
FAQ on this; the example there (using ZAXREPLACE) should
help you, if you have a function that relates the sigma levels to
depth in meters.

http://ferret.pmel.noaa.gov/Ferret/FAQ/data_management/sigma_coordinate_demo.html

Ansley Manke




Francisco J Campuzano Guillen wrote:

> Hello Ferret users:
>
> This is my first message to the list, I recently started to use this
> software because of the need to represent the NETCDF results from the
> COHERENS (Coupled Hydrodynamical-Ecological Model for Regional and
> Shelf Seas) model.
> At this moment, I'm starting to experiment with the test cases that
> comes included in the CD-ROM, and trying to represent the same
> diagrams as they did in the COHERENS User's Guide(where depths are
> represented in meters),and here is where my doubt comes:
> How can I represent with the FERRET package the vertical coordinate in
> meters instead of sigma-coordinated (I'm using the version 5.41 for
> win32 (so -gui mode is not supported))?.Although I can use the data in
> the default sigma coordinates,the outcomes when I SET DATA are:
>
> *** NOTE: Units on axis "z" are not recognized: sigma_level
> *** NOTE: They will not be convertible
>
> I know it is possibly a quite simple question, but I have been looking
> through the FERRET USERGUIDE and couldn't find the solution, if you
> need any other details please ask.Thank you very much in advance your
> help.Yours sincerely:
>
>                         Francisco Javier Campuzano Guillén
>
> ----------------------------------------
> Francisco J Campuzano Guillén
> Email: G.F.Campuzano@hull.ac.uk
> University of Hull

--
Ansley Manke  Pacific Marine Environmental Laboratory  Seattle WA  (206)526-6246