Re: Velocity Potential.

Thanks Adam and Dennis
I get the Idea.

On Thu, Aug 27, 2009 at 11:38 AM, Dennis Shea <shea_at_ucar.edu> wrote:

> The error messages are telling you what is wrong.
>
> ====================
> ; open file to write interpolated variable to (file should not already
> exist)
> out = addfile("GHA.2005.nc","c")
> =====================
> fatal:Could not create (GHA.2005.nc <http://GHA.2005.nc>)
>
> This is *not* an NCL issue. Either you do not have permission
> to write to the current directory or you or a system administrator
> has set a netCDF related environment variable 'NC_CLOBBER'
> such that if GHA.2005.nc exists, it can not be overwritten.
> The user must reset NC_CLOBBER or do the following:
>
> system("/bin/rm -f GHA.2005.nc") ; remove any pre-existing file
> out = addfile("GHA.2005.nc","c")
>
> ==========================
> ; open data file to get sigma lev data from
> data = addfile("ATMdaily.2005.nc", "r")
>
> ;get the variables
> U = data->u
> V = data->v
> =======================
>
> fatal:Either file (data) isn't defined or variable (u) is not a variable in
> the file
> fatal:Execute: Error occurred at or near line 36
>
>
> This is self-explanatory. Either "ATMdaily.2005.nc" is not in the
> current directory [where the NCL script resides] or the variables
> "u" and "v" are not on the file. Maybe they are "U" and "V"
>
> Finally, if your data is 12S- 23N, 20E-80E the your data are
> not global. *You can not use any of the spherical harmonic functions*
> because they require *global* data. This is clearly stated in the
> documentation.
>
>
>
>
> Owanda Otieno wrote:
>
>> Hi all,
>> Can someone please help in identifying the problem with my attached
>> script. When I try to run it I get the following error massage;
>>
>> fatal:Could not create (GHA.2005.nc <http://GHA.2005.nc>)
>> fatal:Either file (data) isn't defined or variable (u) is not a variable
>> in the file
>> fatal:Execute: Error occurred at or near line 36
>>
>> I am working on bluefire and my data is from RegCM3 runs over the region;
>> 12S- 23N, 20E-80E, having the following specifications
>>
>> Descriptor: ATMdaily.2005.nc <http://ATMdaily.2005.nc>
>> Binary: ATMdaily.2005.nc <http://ATMdaily.2005.nc>
>>
>> Type = Gridded
>> Xsize = 214 Ysize = 134 Zsize = 11 Tsize = 334 Esize = 1
>> Number of Variables = 20
>> u 11 t,z,y,x Zonal Wind
>> v 11 t,z,y,x Meridional Wind
>> w 11 t,z,y,x Vertical Velocity
>> tk 11 t,z,y,x Temperature
>> qd 11 t,z,y,x Mixing Ratio
>> qc 11 t,z,y,x Cloud Mixing Ratio
>> rh 11 t,z,y,x Relative Humidity
>> hgt 11 t,z,y,x Geopotential Height
>> th 11 t,z,y,x Potential Temperature
>> td 11 t,z,y,x Dew Point Temperature
>> vor 11 t,z,y,x Horz Vorticity
>> div 11 t,z,y,x Horz Divergence
>> mse 11 t,z,y,x Moist Static Energy
>> ps 0 t,y,x Surface Pressure
>> rt 0 t,y,x Total Precip
>> tgrnd 0 t,y,x Ground Temperature
>> smt 0 t,y,x Total Soil Water
>> bs 0 t,y,x Base Flow
>> slp1 0 t,y,x Sea Level Pressure
>> slp2 0 t,y,x Sea Level Pressure
>>
>>
>> Thanks in Advance
>> Owanda.
>> ------------------------------------------------------------------------
>>
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>>
>
>
> --
> ======================================================
> Dennis J. Shea tel: 303-497-1361 |
> P.O. Box 3000 fax: 303-497-1333 |
> Climate Analysis Section |
> Climate & Global Dynamics Div. |
> National Center for Atmospheric Research |
> Boulder, CO 80307 |
> USA email: shea 'at' ucar.edu |
> ======================================================
>
>

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Received on Thu Aug 27 2009 - 11:48:52 MDT