[ncl-talk] downloading partial netcdf file

[Cathy Smith]

You could use ncks for a single line extraction (see PSD page below that 
Dennis helpfully supplied). e.g.

  ncks -v lat 
https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/interp_OLR/olr.mon.mean.nc 
a.nc

or

ncks -v olr 
https://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/interp_OLR/olr.mon.mean.nc 
a.nc

(ncks keeps coordinate variables too)

NCL will read and write a netCDF file with a single variable usinfg the 
OPEnDAP URL though you have to write a few lines of code. You could even 
make that work as command line routine and read in variable/file to save.

I'm sure there are other ways, too.

Cathy


On 6/10/19 11:35 AM, Dennis Shea wrote:
>
> re: " ... *only downloading specific variables of a NetCDF file"*
>
> The question is unclear. In what context?
> Are you talking about accessing a variable from a remote site [ eg: a 
> NOAA server ] from within a NCL script?
>      See: *https://www.ncl.ucar.edu/Applications/opendap.shtml*
>
> ----
>
> The ESRL: PSD site provides
> *https://www.esrl.noaa.gov/psd/data/gridded/using_dods.html#software*
>
> links to a number of tools to do what you want
>
> Good luck
>
> On Mon, Jun 10, 2019 at 10:01 AM Micah Sklut <micahs2005 at gmail.com 
> <mailto:micahs2005 at gmail.com>> wrote:
>
>     I haven't found any info regarding only downloading specific
>     variables of a NetCDF file, but I just wanted to check with the
>     NCL community in case I am missing something.
>
>     Thank you.
>
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