[NARCCAP-discuss] longitude in netcdf file

[Seth McGinnis]

Hi Jianhua,

In accordance with the IPCC standards for the CMIP3 and CMIP5 archive,
NARCCAP longitudes are stored 0:360, not -180:180.

If you prefer to use negative longitudes for the western hemisphere, you
can convert to the -180:180 convention by subtracting 360 from the
longitude values in the files.

(Note: the one exception is HRM3 files, which are currently stored as
negative longitudes.  We plan to fix this in the future.)

Cheers,

--Seth


On 12/5/13 11:01 PM, Jianhua Huang wrote:
> Hi All:
> 
>  
> 
> When I read the netcdf file, I found that the longitude are positive values
> ranging from about 200 to 326. I think the lon should be negative values in
> North America area. Is the real lon values should minus 360? In this case,
> the lon values range from -160 to -34, which makes sense. 
> 
>  
> 
> Thanks for any help.
> 
>  
> 
> Jianhua
> 
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