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2005-07-14 : Zero downdraft entrainment/detrainments

What was the problem ?

The daily od glb3x2 processing at ECMWF produced zero downdraft entrainments/detrainments during the period:

2004-05-09 to 2005-07-12
As a result, no tracer mass is transported downwards by the downdraft .

Who should be worried ?

Everybody who has used 'od-fc-ml60-glb3x2-sub' files for the period May 2004 to July 2005 during the same period.

Affected files have been storred in the following archives:

          ecmwf  :   ec:/nlh/TM/meteo/od/fc/
          sara   :   /shared/kelder/TM/meteo/od/fc/
          knmi   :   mos:/fa/ks/TM/meteo/od/fc/
The affected monthly tar files are smaller than the proper ones:
          177367040  2004/01/ml60/glb3x2/sub_200401_21p06.tar
          167362560  2004/02/ml60/glb3x2/sub_200402_21p06.tar
          178503680  2004/03/ml60/glb3x2/sub_200403_21p06.tar       :
          180592640  2004/04/ml60/glb3x2/sub_200404_21p06.tar   <-- ok

          150845440  2004/05/ml60/glb3x2/sub_200405_21p06.tar   <-- zeros!
          133058560  2004/06/ml60/glb3x2/sub_200406_21p06.tar         :
          137461760  2004/07/ml60/glb3x2/sub_200407_21p06.tar
          136611840  2004/08/ml60/glb3x2/sub_200408_21p06.tar
          129546240  2004/09/ml60/glb3x2/sub_200409_21p06.tar
          128829440  2004/10/ml60/glb3x2/sub_200410_21p06.tar
          120709120  2004/11/ml60/glb3x2/sub_200411_21p06.tar
          127232000  2004/12/ml60/glb3x2/sub_200412_21p06.tar

How solved

The affected files are reprocessed in July 2005 .

A check on zero downdraft entrainments/detrainments has been added to the meteo routine of TM5. Please update your base version to 2005-07-15 or later.


This was a pure processing error, not a programming error. Might be caused by linking a mixture of older and newer object files.

To avoid this kind of failures, the source of the daily processing will be recompiled every day from now on.

next up previous
Next: Bibliography Up: B. Bug reports Previous: B. Bug reports
Created at IMAU on Tue Mar 3 05:00:05 CET 2009 by a slave chained in the basement