[Report bugs] The bug in read/convert data from grb2 to nc through Xarray-python

[ruhuihuang]

Hi there:

This bug occurs when there is no variable name and multiple variables are mixed together in file of grb format.

Then if you use
data = xr.open_dataset( 'filename.grb2',engine='cfgrib', backend_kwargs={'filter_by_keys': {'typeOfLevel': '.......'}}) or other kind of codes of Xarray to read grb2 data or to convert grb2 data to nc data, although Xarray can read/convert it, you will get incorrect data.

You can have a try using the data from to have a try, also for convenience you can use the data in the attachment to have a try.

On the other hand, even you use data=pygrib.open('filename.grb2'), then you will find it hard to get anything you want since it has no name.

Best regards

Ruhui Huang
Xiamen University
ruhui@stu.xmu.edu.cn

Attachment:
temp.1955.grb2.zip

[raybellwaves]

You may be seeing ecmwf/cfgrib#245