[gradsusr] grads 2.0.a8 refuses to open netcdf file that 2.0.a7 had no problems with...

[James T. Potemra]

Hi Geert:

I think the vertical dimension has to be "z", rather than "unspecified". 

Jim

Geert Jan van Oldenborgh wrote:
> I am upgrading the Climate Explorer (http://climexp.knmi.nl) to a new box, and got the latest version of grads for it.  Curiously, the first netcdf file that I tried did not open in the new version, although it worked fine with 2.0.a7.  The error message is an unhelpful "gadsdf: SDF file does not have any non-coordinate variables" and the file is http://hadobs.metoffice.com/crutem3/data/CRUTEM3.nc.  The headers are
>
> [bima] [13:54] ~/NINO/CRUData% ncdump -h CRUTEM3.nc
> netcdf CRUTEM3 {
> dimensions:
> 	longitude = 72 ;
> 	latitude = 36 ;
> 	unspecified = 1 ;
> 	t = UNLIMITED ; // (1924 currently)
> variables:
> 	float longitude(longitude) ;
> 		longitude:units = "degrees_east" ;
> 		longitude:point_spacing = "even" ;
> 		longitude:modulo = " " ;
> 	float latitude(latitude) ;
> 		latitude:units = "degrees_north" ;
> 		latitude:point_spacing = "even" ;
> 	float unspecified(unspecified) ;
> 		unspecified:units = "unspecified" ;
> 		unspecified:positive = "up" ;
> 	float t(t) ;
> 		t:units = "days since 1850-01-01 00:00:00" ;
> 		t:time_origin = "01-JAN-1850:00:00:00" ;
> 	float temp(t, unspecified, latitude, longitude) ;
> 		temp:source = "No field processing" ;
> 		temp:name = "temp" ;
> 		temp:title = "Temperature T" ;
> 		temp:date = "01/01/50" ;
> 		temp:time = "00:00" ;
> 		temp:long_name = "Temperature T" ;
> 		temp:units = "K" ;
> 		temp:missing_value = 2.e+20f ;
> 		temp:_FillValue = 2.e+20f ;
> 		temp:valid_min = -20.9f ;
> 		temp:valid_max = 19.5f ;
>
> // global attributes:
> 		:history = "Mon May 24 11:34:35 BST 2010 - XCONV V1.90 11-May-2004" ;
> }
>
> In what respect is this netcdf file non-CF conforming and how can I fix it?
>
> Greetings from sunny Holland,
>
> 	Geert Jan van Oldenborgh
>
> --
> Geert Jan van Oldenborgh
> Global Climate Research
> KNMI
> oldenborgh at knmi.nl
> www.knmi.nl/~oldenbor
>
>
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