How do I convert Grib to NetCDF?

Steps to convert GRIB to netCDF

1. Split z axis.
2. Convert the resulting output files to netcdf.
3. Convert vorticity and divergence to wind.
4. Interpolate to pressure from model levels.
5. Viewing contents of GRIB files.

What is CDO NetCDF?

CDO is a large tool set for working on climate and NWP model data. NetCDF 3/4, GRIB 1/2 including SZIP (or AEC) and JPEG compression, EXTRA, SERVICE and IEG are supported as IO-formats. Apart from that CDO can be used to analyse any kind of gridded data not related to climate science.

How do I open a Grib file in R?

Using R to open grib files

1. convert grib to netcdf using the command line function ncl_convert2nc from ncar command language.
2. use package ncdf in R to import the netcdf data.

How do I download a CDO?

Download CDO from https://code.zmaw.de/projects/cdo/files. On a unix box download using wget- “wget https://code.zmaw.de/attachments/download/11392/cdo-1.7.0.tar.gz.” Use the latest verion of cdo. Download NetCDF from http://www.unidata.ucar.edu/downloads/netcdf/index.jsp. Use the C version.

What is a CDO in a company?

Shutterstock. Chief digital officers (CDO) have a lot on their plates; not only are they responsible for the digital transformation of their organisation and future-proofing of its operations, but they also have to do so without getting in the way of the CIO and CTO.

How do you make a CDO?

To create a CDO, investment banks gather cash flow-generating assets—such as mortgages, bonds, and other types of debt—and repackage them into discrete classes, or tranches based on the level of credit risk assumed by the investor.

How do I convert Grib to CSV?

Run command grib_get_data -w time=1200 t2m_20000801. grib > temp. csv and you will get a file containing data like below. Option -w time=1200 filters data for time = 12:00 only, typing grib_get_data for help.

What is the difference between a CIO and a CDO?

Or simply, the CIO is responsible for the information systems through which data flows and is stored, and not concerned with the business responsibility of the data in them. Whereas the CDO is responsible for managing how the data in the systems is governed and used.

What is GRIB file?

GRIB is a file format for the storage and transport of gridded meteorological data, such as Numerical Weather Prediction model output. It is designed to be self-describing, compact and portable across computer architectures. The GRIB standard was designed and is maintained by the World Meteorological Organization.

How do I open a netCDF file in Python?

Reading netCDF data using Python

1. from netCDF4 import Dataset import numpy as np.
2. my_example_nc_file = ‘/Users/jhamman/Desktop/my_example_nc_data.nc’ fh = Dataset(my_example_nc_file, mode=’r’)
3. lons = fh.variables[‘lon’][:] lats = fh.variables[‘lat’][:] tmax = fh.variables[‘Tmax’][:] tmax_units = fh.variables[‘Tmax’].units.

How to convert GRIB files to netCDF files?

Please note that if using the MARS archive (apps.ecmwf.int) (e.g. for reanalysis products such as ERA-Interim/ERA-5), it is possible to download the files in netCDF format as well as GRIB. This command will convert one or more GRIB files to netCDF and is available with the ECMWF ecCodes software.

How to REGRID lon / lat field in netCDF?

As variable names are not stored in grib files, you may need to contact the institute that built the grib file to identify variables (e.g. check ungrib/Variable_Tables for WRF/WPS files). To regrid a lon/lat field to another lon/lat grid: It is also possible to define non-structured grids, e.g.:

How to disable cgribex decoder in GRIB Edition 1?

The -R option only works for GRIB edition 1 (GRIB 1) data as it uses the CGRIBEX decoder. For GRIB-2 messages it’s better to use the setgridtype operator: If you have files with a mix of GRIB-1 and GRIB-2, then either split the file first or compile cdo with “–disable-cgribex –with-eccodes=yes”

How to convert vorticity and divergence to netCDF?

Convert GRIB to netCDF storing values as floats rather than scaled integers… To convert from vorticity and divergence to wind u and v, please see CDO instructions below. Note that grib_to_netcdf does not do any regridding. If the fields use a reduced Gaussian latitude grid, they will not be converted to a regular grid.