Re: grib variables for NCL

From: David Ian Brown (dbrown AT ucar.edu)
Date: Mon Jul 11 2005 - 18:38:44 MDT


Hi Chad,

After the 'addfile' call, do

print(in)

to see the contents of the file, or

print(getfilevarnames(in))

to get a simple list of the variable names.

You will find a variable with 'WIND' contained in the name.
However, NCL also encodes information about the grid and the level type
into the variable name. For a detailed explanation of how NCL
names variables in GRIB data files (and why), see

   
http://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/
NclFormatSupport.shtml#GRIB

  -dave

On Jul 11, 2005, at 5:48 PM, Chad Wiersema wrote:

> How would i go about finding variables for NCL in a
> NOAA grib file?
>
> i have wgrib to view information, but cant seem to
> find the variable. Here are the results from wgrib.
>
>
> C:\grib>wgrib wna.wind.grb -s
> 1:0:d=05050606:WIND:sfc:anl:NAve=0
> 2:57092:d=05050606:WIND:sfc:3hr fcst:NAve=0
> 3:114184:d=05050606:WIND:sfc:6hr fcst:NAve=0
> 4:175822:d=05050606:WIND:sfc:9hr fcst:NAve=0
> 5:237460:d=05050606:WIND:sfc:12hr fcst:NAve=0
> 6:299098:d=05050606:WIND:sfc:15hr fcst:NAve=0
> 7:360736:d=05050606:WIND:sfc:18hr fcst:NAve=0
> 8:422374:d=05050606:WIND:sfc:21hr fcst:NAve=0
> 9:484012:d=05050606:WIND:sfc:24hr fcst:NAve=0
> 10:545650:d=05050606:WIND:sfc:27hr fcst:NAve=0
> 11:607288:d=05050606:WIND:sfc:30hr fcst:NAve=0
> 12:668926:d=05050606:WIND:sfc:33hr fcst:NAve=0
> 13:730564:d=05050606:WIND:sfc:36hr fcst:NAve=0
> 14:792202:d=05050606:WIND:sfc:39hr fcst:NAve=0
> 15:853840:d=05050606:WIND:sfc:42hr fcst:NAve=0
> 16:910932:d=05050606:WIND:sfc:45hr fcst:NAve=0
> 17:968024:d=05050606:WIND:sfc:48hr fcst:NAve=0
> 18:1029662:d=05050606:WIND:sfc:51hr fcst:NAve=0
> 19:1091300:d=05050606:WIND:sfc:54hr fcst:NAve=0
> 20:1152938:d=05050606:WIND:sfc:57hr fcst:NAve=0
> 21:1214576:d=05050606:WIND:sfc:60hr fcst:NAve=0
> 22:1276214:d=05050606:WIND:sfc:63hr fcst:NAve=0
> 23:1337852:d=05050606:WIND:sfc:66hr fcst:NAve=0
> 24:1399490:d=05050606:WIND:sfc:69hr fcst:NAve=0
> 25:1456582:d=05050606:WIND:sfc:72hr fcst:NAve=0
> 26:1513674:d=05050606:WIND:sfc:75hr fcst:NAve=0
> 27:1570766:d=05050606:WIND:sfc:78hr fcst:NAve=0
> 28:1627858:d=05050606:WIND:sfc:81hr fcst:NAve=0
> 29:1684950:d=05050606:WIND:sfc:84hr fcst:NAve=0
> 30:1742042:d=05050606:WIND:sfc:87hr fcst:NAve=0
> 31:1799134:d=05050606:WIND:sfc:90hr fcst:NAve=0
> 32:1856226:d=05050606:WIND:sfc:93hr fcst:NAve=0
> 33:1913318:d=05050606:WIND:sfc:96hr fcst:NAve=0
> 34:1970410:d=05050606:WIND:sfc:99hr fcst:NAve=0
> 35:2027502:d=05050606:WIND:sfc:102hr fcst:NAve=0
> 36:2084594:d=05050606:WIND:sfc:105hr fcst:NAve=0
> 37:2141686:d=05050606:WIND:sfc:108hr fcst:NAve=0
> 38:2198778:d=05050606:WIND:sfc:111hr fcst:NAve=0
> 39:2255870:d=05050606:WIND:sfc:114hr fcst:NAve=0
> 40:2312962:d=05050606:WIND:sfc:117hr fcst:NAve=0
> 41:2370054:d=05050606:WIND:sfc:120hr fcst:NAve=0
> 42:2427146:d=05050606:WIND:sfc:123hr fcst:NAve=0
> 43:2484238:d=05050606:WIND:sfc:126hr fcst:NAve=0
> 44:2541330:d=05050606:WIND:sfc:129hr fcst:NAve=0
> 45:2598422:d=05050606:WIND:sfc:132hr fcst:NAve=0
> 46:2655514:d=05050606:WIND:sfc:135hr fcst:NAve=0
> 47:2712606:d=05050606:WIND:sfc:138hr fcst:NAve=0
> 48:2769698:d=05050606:WIND:sfc:141hr fcst:NAve=0
> 49:2826790:d=05050606:WIND:sfc:144hr fcst:NAve=0
> 50:2883882:d=05050606:WIND:sfc:147hr fcst:NAve=0
> 51:2940974:d=05050606:WIND:sfc:150hr fcst:NAve=0
> 52:2998066:d=05050606:WIND:sfc:153hr fcst:NAve=0
> 53:3055158:d=05050606:WIND:sfc:156hr fcst:NAve=0
> 54:3112250:d=05050606:WIND:sfc:159hr fcst:NAve=0
> 55:3169342:d=05050606:WIND:sfc:162hr fcst:NAve=0
> 56:3226434:d=05050606:WIND:sfc:165hr fcst:NAve=0
> 57:3283526:d=05050606:WIND:sfc:168hr fcst:NAve=0
> 58:3340618:d=05050606:WIND:sfc:171hr fcst:NAve=0
> 59:3397710:d=05050606:WIND:sfc:174hr fcst:NAve=0
> 60:3454802:d=05050606:WIND:sfc:177hr fcst:NAve=0
> 61:3511894:d=05050606:WIND:sfc:180hr fcst:NAve=0
>
>
>
> I have tried
>
> in = addfile("wna.WIND.grb","r") : this loads fine
>
> t=in->WIND : this says fatal not a variable in file
>
>
> any suggestions?
>
> thanks,
> chad
>
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