You may be able to install the Climate Data Operators (CDO) in Windows following these instructions:

https://code.mpimet.mpg.de/projects/cdo/wiki/Win32

If you have a recent version of Windows 10, you might also be able to install an Ubuntu environment, and from the Ubuntu terminal simply install using:

apt install cdo

Once you have cdo installed, you can convert a grib file using the cdo copy command:

cdo -f nc copy your_file_name.grb output_file_name.nc

Dear Neda,

in R, use rgdal::readGDAL() or raster::raster() or rNOMADS::ReadGrib() for reading grib file, and use ncdf4 and raster::writeRaster() for writing it as .nc file.

HTH,

Ákos

Hi Neda Abbasi,

A method mentioned by Luis E. Ortiz is one of the simplest way to convert GRIB file format data into NetCDF. Similarly, there is another method where you can convert huge size GRIB data to NetCDF in single line command with fastest mode. For that you need NCAR Command Language (NCL), in your system.

For installation NCL, you may follow this link:

https://www.ncl.ucar.edu/Download/

After installation, you just simply run this following command in terminal of same directory of data:

ncl_convert2nc ERA_precipitation.grb

The above will create a NetCDF file called "ERA_precipitation.nc" in same working directory.

You can view the result by:

ncdump -h ERA_precipitation.nc

Hope so this information helps you.

Best wishes.

Cheers..!

Avinash

Avinash N Parde Thank you I did not know this other system to convert .grib to .nc. Would it be possible to use this system in Windows 10? Are there any kind of limitations?

Thank you.

Best,

Giorgio