CODEWITHSUNDEEP
cdo-climate
climsaver
climsaver

Reputation: 617

Warning (cdfInqContents): Coordinates variable XTIME can't be assigned

I have a high number of daily WRF outputs, each one consisting of 24 time steps for every single hour of the day. Now I would like to combine these single output files to one resulting file that comprises the entire time period by using cdo mergetime. I have done this before with some other output files in another context and it worked well.

When I apply this command for example: cdo mergetime wrf_file1.nc wrf_file2.nc output_file.nc

I get the following message many times: Warning (cdfInqContents): Coordinates variable XTIME can't be assigned!

Since it is only a warning and not an error, the process continues. But it takes way too much time and the resulting output file is way too big. For example, when the two input files are about 6 GB, the resulting output file is above 40 GB, which does not make sense at all.

Anybody with an idea how to solve this?

Upvotes: 0

Views: 856

Answers (1)

Robert Wilson
Robert Wilson

Reputation: 3407

The merged files are probably large because CDO does not, by default, compress the output file. And the WRF files are probably compressed.

You can modify your call to compress the output as follows:

cdo -z zip -mergetime wrf_file1.nc wrf_file2.nc output_file.nc

Upvotes: 3

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