Creating a full pressure level variable with CDO?
Added by Marston Ward about 12 years ago
Hi,
I was wondering if it is possible to use CDO to create the full pressure variable?
Given that the A and B coefficients exist in the file, as well as the surface pressure, can CDO do this?
/M
Replies (4)
RE: Creating a full pressure level variable with CDO? - Added by Uwe Schulzweida about 12 years ago
Hi Marston,
CDO has an undocumented module to create 3D pressure parameter from the A and B coefficients and the surface pressure. Here is a list of the available CDO operators in this module:
| pressure_fl | Pressure on full hybrid levels |
| pressure_hl | Pressure on half hybrid levels |
| deltap | Difference of two half hybrid levels |
One problem with netCDF files is that the description of the Vertical Coordinate Table (A+B) have to follow the ECHAM convention. And these operators support only the name or GRIB parameter ID of the surface pressure from ECHAM/ECMWF/WMO tables.
Please note, that all these operators have the status experimental and the name of the operators can be change in future releases.
Best regards,
Uwe
RE: Creating a full pressure level variable with CDO? - Added by Marston Ward about 12 years ago
HI Uwe,
As I'm working with ECMWF type files, I should be ok. Thanks for the info.
Regards,
/Marston
RE: Creating a full pressure level variable with CDO? - Added by Marston Ward about 12 years ago
God Lord! COD is the greatest thing since slice bread! I kid you not!
This thing works like a charm. Thanks a lot!
/M
RE: Creating a full pressure level variable with CDO? - Added by Marston Ward about 12 years ago
Scratch that last reply and its horrible typos! Loose nut at the keyboard. It should read: "Good Lord! CDO is the greatest thing since slice bread! I kid you not!
This thing works like a charm. Thanks a lot!"