using xdfopen on a .nc file

[Lisa Murphy]

It worked! Thank you very much, Mai!

**********************************************
Lisa Nicole Murphy
Graduate Research Assistant

Department of Atmospheric & Oceanic Science
University of Maryland
College Park, MD 20742
**********************************************

On Mon, 27 Mar 2006, Chi Mai Nguyen wrote:

> Hi Lisa,
>
> Setting ZDEF is just for grads to display the labels on z axis accordingly to what you have desribed in the LEVELS.
>
> I think you should put in 'zrev' in OPTIONS such as:
> OPTIONS zrev
>
> Hope that this will fix your problem.
>
> Good luck,
> Mai
>
>
> Lisa Murphy <lmurphy at ATMOS.UMD.EDU> wrote:
>> Dear All,
>>
>> My run of the Single column community climate model (SCAM) produced a
>> netcdf
>> output file. SDFOPEN and OPEN didn't work so I opened it in GrADS by
>> doing
>> an xdfopen on a data descriptor file (.ddf). Under the grads website it
>> said to enter in the least amount of information into the ddf so that
>> grads
>> pulls most of the information from the .nc file. So I tried it with just:
>>
>> DSET /run_ctl_10yr.nc
>> XDEF lon 1 levels 23
>> YDEF lat 1 levels 35
>>
>> The file opened and I was able to plot the data but when I tried to plot
>> the
>> multiple level variables the vertical axis was upside down (1000mb was at
>> the top and 1mb at the bottom).
>>
>> I tried creating another .ddf file by inputting zdef with the 26 levels
>> in
>> the order in which you would put them if you were creating a regular
>> control
>> file (not the order it appears when you do ncdump):
>>
>> DSET /run_ctl_10yr.nc
>> XDEF lon 1 levels 23
>> YDEF lat 1 levels 35
>> ZDEF lev 26 levels 999.120684958666, 976.965519334695, 935.765736387855,
>> 872.828394498624, 792.798658152295, 701.239586497683, 604.275579011531,
>> 513.559441962607, 436.449217157429, 370.90429427665, 315.190036222099,
>> 267.831911732807, 227.576829588822, 193.359407868247, 164.273984606776,
>> 139.550908021003, 118.535909681669, 100.672811033688, 85.4888992285199,
>>     70.0591400000001, 53.1146000000002, 37.2302900000001, 23.94463,
>>     13.9672100000001, 7.38881300000002, 3.54463800000002
>>
>> This gave the correct z-axis but the data wasn't right. I opened the same
>> file using the two .ddf files in the same grads session. I set z=16 for
>> both files and then displayed the temperature. The temperature was
>> exactly
>> the same for the two .ddf files even though lev=139.551 in the first file
>> and lev=315.19 in the second file. Could anybody tell me what I'm doing
>> wrong??
>>
>> Thank you!
>>
>> Lisa
> --
> *********************************
> Nguyen Chi Mai
> School of Mathematical Sciences
> R. 462, Bld. 28, Clayton Campus
> Monash University
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