[RegCNET] RE : RE : problem running REGCM

[Bamba Sylla]

Hi carolina !
   
  have u tried to set dt=50 and abtm=150 or abtm=200 kepping dx=20 ?

Carolina Cavazos Guerra <c.cavazos at ucl.ac.uk> a écrit :
  Dear RegCM users

Thank you for all the recomendations I have received, I forgot to mention that I
have tried with diferent timesteps before, even increasing and decreasing by a 2
3 4 x, when I increase the timestep say dt=100 abtm=200, the program last longer
but it crashes anyway. At first I did think that the problem involved just
timestep but now that you mention the values in domain as a cause, I'm starting
to have my doubts. The domain was configurated in the next way:

parameter(iproj='NORMER') ! Map projection (LAMCON,NORMER,POLSTR,ROTMER)
parameter(iy=100) ! number of grid points in y direction (i)
parameter(jx=100) ! number of grid points in x direction (j)
parameter(kz=23) ! number of vertical levels (14, 18 or 23)
parameter(nsg=1) ! number of subgrids in 1 grid (one direction)

parameter(ds=20.0) ! grid point separation in km
parameter(ptop= 5.0) ! pressure of model top in cb.

parameter(clat= 16.0) ! Central latitude (North positive)
parameter(clon= 16.0) ! Central longitude (East positive)

the rest of the parameters are the defaults in the domain, and it covers just 7
days, I already tried with diferent dates, using 5 or 10 days, and the result
is the same, as I mentioned before I have no problems even with 25, 40, 60 km,
I think finally will use 25 km, but still find quite strange I'm unable to use
a lower value, so please if somebody knows the answer please let me know, at
least I will rest in peace.

Cheers

Carolina



Carolina Cavazos Guerra
University College London
Department of Geography
Pearson Building, Gower Street
London, WC1E 6BT, UK
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**************************************************************
M. Bamba SYLLA
Laboratoire de Physique de l'Atmosphère et de l'Océan (LPAO-SF)
Ecole Supérieure Polytechnique (ESP)
Université Cheikh Anta Diop (UCAD)
BP : 5085 Dakar-Fann Sénégal
Tel : (+221) 825 93 64
      (+221) 712 45 05
Fax : (+221) 825 93 64
Email : syllabamba at yahoo.fr
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