How to restart the IS4DVAR date assimilation system?

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wavewatch
Posts: 7
Joined: Thu Nov 14, 2013 1:51 am
Location: institute of oceanology

How to restart the IS4DVAR date assimilation system?

#1 Post by wavewatch » Tue Jul 10, 2018 5:31 am

I can successfully run the primal form of incremental, strong constraint, 4-Dimensional Variational (4D-Var) data assimilation algorithm in the California Current System, 1/3 degree resolution, application (WC13).
Now I have a question for you:

If I complete the assimilation for 7 days, the model stops. And I want to continue assimilation on the next 7 days.
What should I do? I've tried to do this: NRREC == -1,ININAME == ***_rst.nc,just set up like non-assimilation.

However, errors are made in assimilation :( , as follows:

Code: Select all

<<<< Descent Algorithm >>>>

  CG_DELTA not positive.
  CG_DELTA not positive.
  CG_DELTA not positive.
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
           1
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
           1
  CG_DELTA not positive.
  CG_DELTA not positive.
  CG_DELTA not positive.
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
           1
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
           1
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
           1
  CG_DELTA not positive.
  CG_DELTA not positive.
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
           1
  CG_DELTA not positive.
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
           1
  CG_DELTA =   -227074.319591249      , outer =            1 , inner = 
Here is my output.file

Does anyone know the answer to the question?
Attachments
output.log
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