error in model run

[samad r]

hi hycom expert
I configure the model for 0.05 in persian gulf but when i run the model, I have the error( see attachement )
can i resolve this error?

thanks in advance
samad

[alan.wa...@hycom.org]

When the model crashes within the 1st couple of time steps it is almost always "batrop" too large.  In this case you have batrop=20.0, which is large for a 5km grid.  The best way to estimate batrop is to run topo_batrop, see https://groups.google.com/a/hycom.org/d/msg/forum/gB2yoqbRkrE/9T9FeUUnBQAJ

Alan.

[samad r]

thanks alan
I use topo_batrop the output is:
bathymetery from 30-second GEBCO_08 20091120 global dataset, new 11x11 average
i/jdm =  225  160                                                             
plon,plat range =    47.50000    58.70000    23.49952    30.57386             
                                                                              
Filled N and S edges for CICE                                                 
gsp:  min,max =      0.654   178.075
cfl:  min,max =     20.139  5357.629

I use batrop time =15 sec (75% min  cfl ) and 60 sec baclin time but model crashes within the 1st couple of time steps!
what other factors/input should I check?
any help would do


thanks in advance
samad

[alan.wa...@hycom.org]

I would not make baclin that small.  It is typically 8 (or many more) batrop time steps.

Your problem may be the bathymetry:

 reading bathymetry file from regional.depth.[ab]

 bathymetery from 30-second GEBCO_08 20091120 global dataset, new 11x11 average
 i/jdm =  225  160                                                             
 plon,plat range =    47.50000    58.70000    23.49952    30.57386             
                                                                               
 Filled N and S edges for CICE                                                 

 min,max depth =     0.04364  3233.82178    

The minimum should be something like 5m  (we have used 2 m in the Gulf of Mexico).  There is no need to change the coastline, just clip all depths less than 5 m to 5 m.  I would clip and then smooth 1x.  See the attached scripts.  Note that if you leave the coastline the same, the only new files you should need are relax (and depth obviously).

Alan.