[gradsusr] Multiple netcdf files in one control file

[mehwish ramzan]

Dear Malleswararao,

Thank you for your kind reply. Ok i will try your suggestions.

With Best Regards,

Mehwish


On Mon, May 12, 2014 at 4:02 PM, Malleswararao Maguluri <
mallesh4science at gmail.com> wrote:

> Hi,
>
>    Better to use cdo for calculating climatology. otherwise you can
> combine your decadal files as a single file using cat command in cdo and
> use it as input to grads.
>
> Thanks & regards,
>
>
> On Mon, May 12, 2014 at 12:18 PM, mehwish ramzan <mehwish.ramzan at gmail.com
> > wrote:
>
>> Dear GrADS community,
>>
>> I am trying to merge multiple netcdf files into one control file so that
>> i can calculate the climatology of 25 years. The data is available in
>> decadal format like this;
>>
>>  cru_ts3.21.1971.1980.tmp.dat.nc
>>  cru_ts3.21.1981.1990.tmp.dat.nc
>>  cru_ts3.21.1991.2000.tmp.dat.nc
>>  cru_ts3.21.1991.2000.tmp.dat.nc
>>
>> while the information of one .nc file is as;
>>
>>  File 1 : CRU TS3.21 Mean Temperature
>>
>>   Descriptor: cru_ts3.21.1971.1980.tmp.dat.nc
>>
>>   Binary: cru_ts3.21.1971.1980.tmp.dat.nc
>>
>>   Type = Gridded
>>
>>   Xsize = 720  Ysize = 360  Zsize = 1  Tsize = 120
>>
>>   Number of Variables = 1
>>
>>     tmp 0 -999 near-surface temperature
>>
>> By following some previous posts regarding same issue, according to my
>> understanding i prepared one ctl file which can be used as a combination of
>> above four separate files. The .ctl file is as follows;
>>
>> DSET  cru_ts3.21.%x31.%x30.tmp.dat.nc
>>
>> OPTIONS template
>>
>> DTYPE netcdf
>>
>> XDEF 720 linear -89.75 89.75
>>
>> YDEF 360 linear 0 360
>>
>> ZDEF   1 linear 1000
>>
>> TDEF 480 linear jan1971 1mo
>>
>> vars 1
>>
>> tmp 0  99 near-surface temperature
>>
>> endvars
>>
>>
>> But when i tried to open this control file. It give error message;
>>
>> Invalid variable record
>>
>>   --> The invalid description file record is:
>>
>>   --> tmp 0 -999 near-surface temperature
>>
>>   The data file was not opened.
>>
>> I know i am making mistake in preparing ctl file  but i don't know how to
>> put right information ?
>>
>> Please help me in solving this issue.
>>
>>
>> Thank You
>>
>>
>> With Best Regards,
>>
>>
>> Mehwish
>>
>>
>>
>>
>>
>>
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>>
>>
>
>
> --
> M. MALLESWARA RAO
> M.Tech (Atmospheric Science) & M.Sc (Physics)
>
>
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>
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