[Met_help] Re: netcdf data for use with MET verification software

[John Halley Gotway]

Linlin,

Unfortunately, MET will still not be able to read the NetCDF output of WRF
directly.  The model outputs its fields on a grid that's staggered in the
horizontal and in eta levels in the vertical.  However, MET performs
verification on regular grids and pressure levels in the vertical.

So users will still be required to post-process their model output using
the WRF Post-Processor or ARW-Post prior to verification.

Thanks,
John

>
> Hi, John,
>
> Thanks a lot for your help!
>
> It will be great if the netcdf output of WRF can be accepted by MET.
> I am looking forward to using the new verison of MET.
>
> Best regards,
>
> Linlin
>
>
>> Linlin,
>>
>> These parameters define the grid on which the data resides.  The numbers
>> correspond to how a Lambert Conformal grid is defined in a GRIB record.
>> Look on this page for the section on Lambert Conformal grids:
>> http://www.nco.ncep.noaa.gov/pmb/docs/on388/tabled.html
>>
>> When referring to this table, here is the correspondence between the
>> contents of the NetCDF attributes and the contents of the GRIB table for
>> Lambert Conformal grids:
>> p1_deg = Latin 1
>> p2_deg = Latin 2
>> p0_deg = La1 (Latitude of the first grid point)
>> l0_deg = Lo1 (Longitude of the first grid point)
>> lcen_deg = Lov (Center longitude)
>> d_km = Dx and Dy, but specified in km, not meters
>>
>> I realize that this in not very straight-forward, and I apologize for
>> that.  We had not anticipated that users would be using NetCDF files
>> directly with MET.  This NetCDF output of the PCP-Combine tool was
>> originally meant as an intermediate data format within MET.
>>
>> For the next version of MET, version 2.0 in February, we're working on
>> making it easier to use NetCDF files in MET.
>>
>> Thanks and good luck,
>> John
>>
>> >
>> > Hi, John,
>> >
>> > I saw your comments on the netcdf data for with MET verification
>> software
>> > at:
>> >
>> > http://www.ncl.ucar.edu/Support/talk_archives/2008/1066.html
>> >
>> > I am wondering whether you could do me a favor by explaning to me the
>> > physical meaning of following variables:
>> >
>> > - p1_deg = "25.000000 degrees_north" ;
>> > - p2_deg = "25.000000 degrees_north" ;
>> > - p0_deg = "12.190000 degrees_north" ;
>> > - l0_deg = "-133.459000 degrees_east" ;
>> > - lcen_deg = "-95.000000 degrees_east" ;
>> > - d_km = "40.635000 km" ;
>> >
>> > Thanks a lot for your help!
>> >
>> > Best regards,
>> >
>> > Linlin
>> >
>>
>>
>>
>