netcdf time (cf-standard) and cdo – in #9: CCLM

in #9: CCLM

<p> “seconds since 2015-12-31 18:00:00Z” follows the <span class="caps"> ISO </span> 8601 standard for time formatting. <br/> https://de.wikipedia.org/wiki/ISO_8601 </p> <p> The CF-Conventions does not provide a mandatory format. Actually, in https://cfconventions.org/Data/cf-conventions/cf-conventions-1.8/cf-conventions.html you can find also an example that follows the <span class="caps"> ISO </span> 8601 standard: <br/> Example 5.7. Lambert conformal projection time:units = “hours since 2004-06-23T22:00:00Z”; </p> <p> Therefore it is a problem in <span class="caps"> CDO </span> . <br/> Since we start climate simulations generally at 00UTC, this does not harm. <br/> If you really want to start at 18 <span class="caps"> UTC </span> , the only work around is to replace the T by a blank in netcdf_io.f90 at about line 1900 and create a new executable. </p>

  @burkhardtrockel in #5ddee74

<p> “seconds since 2015-12-31 18:00:00Z” follows the <span class="caps"> ISO </span> 8601 standard for time formatting. <br/> https://de.wikipedia.org/wiki/ISO_8601 </p> <p> The CF-Conventions does not provide a mandatory format. Actually, in https://cfconventions.org/Data/cf-conventions/cf-conventions-1.8/cf-conventions.html you can find also an example that follows the <span class="caps"> ISO </span> 8601 standard: <br/> Example 5.7. Lambert conformal projection time:units = “hours since 2004-06-23T22:00:00Z”; </p> <p> Therefore it is a problem in <span class="caps"> CDO </span> . <br/> Since we start climate simulations generally at 00UTC, this does not harm. <br/> If you really want to start at 18 <span class="caps"> UTC </span> , the only work around is to replace the T by a blank in netcdf_io.f90 at about line 1900 and create a new executable. </p>
BR replied

“seconds since 2015-12-31 18:00:00Z” follows the ISO 8601 standard for time formatting.
https://de.wikipedia.org/wiki/ISO_8601

The CF-Conventions does not provide a mandatory format. Actually, in https://cfconventions.org/Data/cf-conventions/cf-conventions-1.8/cf-conventions.html you can find also an example that follows the ISO 8601 standard:
Example 5.7. Lambert conformal projection time:units = “hours since 2004-06-23T22:00:00Z”;

Therefore it is a problem in CDO .
Since we start climate simulations generally at 00UTC, this does not harm.
If you really want to start at 18 UTC , the only work around is to replace the T by a blank in netcdf_io.f90 at about line 1900 and create a new executable.

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