ROMS Blows up on after first time step

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iriskeizer

ROMS Blows up on after first time step

#1 Unread post by iriskeizer »

Dear ROMS users,

I'm running ROMS for a setup of the North/Western European shelf including the North Sea similar as was used in this paper (https://doi.org/10.1029/2020JC016325)

I ran this set-up successfully using glorys12v1 and ora-20c ocean reanalysis data as lateral forcing input. Now, I changed the lateral forcing input to SODA3.4.2 data and get a model blow-up.
I've tried to figure out what might cause this blow-up but haven't figured it out yet.




Therefore, my question is: does anyone have a clue what might go wrong here?






From comparing the forcing input of ORA, GLORYS and SODA (figures attached) the biggest difference I see is some strong meridional currents in the northern part of the domain as well as a weird spot of high velocities in the English Channel: might these cause the blow-up?



Info from the log file:


Code: Select all

NL ROMS/TOMS: started time-stepping: (Grid: 01 TimeSteps: 000000000001 - 000008608320)

  GET_NGFLD_NF90   - river runoff mass transport,                         1980-01-15 00:00:00.00
                      (Grid= 01, Rec=385, Index=1, File: Rivers_NorthSea4_smooth013_Dai2014_AnnualCycle_1948-2020.nc)
                      (Tmin=         14.0000 Tmax=      26678.0000)   t =      11702.0000
                      (Min =  4.54874992E+00 Max =  2.74330469E+03)
  GET_NGFLD_NF90   - river runoff potential temperature,                  1980-01-15 00:00:00.00
                      (Grid= 01, Rec=385, Index=1, File: Rivers_NorthSea4_smooth013_Dai2014_AnnualCycle_1948-2020.nc)
                      (Tmin=         14.0000 Tmax=      26678.0000)   t =      11702.0000
                      (Min =  6.04702025E-01 Max =  1.33829707E+01)
  GET_NGFLD_NF90   - river runoff salinity,                               1980-01-15 00:00:00.00
                      (Grid= 01, Rec=385, Index=1, File: Rivers_NorthSea4_smooth013_Dai2014_AnnualCycle_1948-2020.nc)
                      (Tmin=         14.0000 Tmax=      26678.0000)   t =      11702.0000
                      (Min =  0.00000000E+00 Max =  0.00000000E+00)
  GET_2DFLD_NF90   - surface u-wind component,                            1980-01-15 00:00:00.00
                      (Grid=01, Rec=43885, Index=2, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.0000
                      (Min = -1.71584738E+01 Max =  1.03370120E+01)   regrid = T
  GET_2DFLD_NF90   - surface v-wind component,                            1980-01-15 00:00:00.00
                      (Grid=01, Rec=43885, Index=2, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.0000
                      (Min = -1.66739568E+01 Max =  1.34767387E+01)   regrid = T
  GET_2DFLD_NF90   - surface air pressure,                                1980-01-15 00:00:00.00
                      (Grid=01, Rec=43885, Index=2, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.0000
                      (Min =  9.97054800E+02 Max =  1.03560353E+03)   regrid = T
  GET_2DFLD_NF90   - cloud fraction,                                      1980-01-15 00:00:00.00
                      (Grid=01, Rec=43885, Index=2, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.0000
                      (Min =  0.00000000E+00 Max =  1.00000000E+00)   regrid = T
  GET_2DFLD_NF90   - solar shortwave radiation flux,                      1980-01-15 00:00:00.00
                      (Grid=01, Rec=10972, Index=2, File: ERA5_NorthAtlantic_fc_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      26663.0000)   t =      11702.0000
                      (Min =  3.87900013E-07 Max =  3.05591635E-05)   regrid = T
  GET_2DFLD_NF90   - surface air temperature,                             1980-01-15 00:00:00.00
                      (Grid=01, Rec=43885, Index=2, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.0000
                      (Min = -1.77347425E+01 Max =  1.47850672E+01)   regrid = T
  GET_2DFLD_NF90   - surface air relative humidity,                       1980-01-15 00:00:00.00
                      (Grid=01, Rec=43885, Index=2, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.0000
                      (Min =  5.01757085E-01 Max =  1.00002594E+00)   regrid = T
  GET_2DFLD_NF90   - rain fall rate,                                      1980-01-15 00:00:00.00
                      (Grid=01, Rec=21943, Index=2, File: ERA5_NorthAtlantic_fc_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      26663.0000)   t =      11702.0000
                      (Min =  2.58700700E-10 Max =  1.27037606E-03)   regrid = T
  GET_NGFLD_NF90   - free-surface western boundary condition,             1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -9.32745883E-01 Max = -2.84624735E-01)
  GET_NGFLD_NF90   - free-surface eastern boundary condition,             1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -3.90600213E-01 Max =  0.00000000E+00)
  GET_NGFLD_NF90   - free-surface southern boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -4.36709145E-01 Max =  0.00000000E+00)
  GET_NGFLD_NF90   - free-surface northern boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -9.65425560E-01 Max =  0.00000000E+00)
  GET_NGFLD_NF90   - 2D u-momentum western boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -1.43084735E-01 Max =  6.70579746E-02)
  GET_NGFLD_NF90   - 2D v-momentum western boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -5.73032014E-02 Max =  4.45518009E-02)
  GET_NGFLD_NF90   - 2D u-momentum eastern boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -1.68912131E-02 Max =  1.44725731E-02)
  GET_NGFLD_NF90   - 2D v-momentum eastern boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  0.00000000E+00 Max =  2.43137833E-02)
  GET_NGFLD_NF90   - 2D u-momentum southern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -6.79744855E-02 Max =  2.83870120E-02)
  GET_NGFLD_NF90   - 2D v-momentum southern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.60574259E-02 Max =  4.08546589E-02)
  GET_NGFLD_NF90   - 2D u-momentum northern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -1.43084735E-01 Max =  1.52815998E-01)
  GET_NGFLD_NF90   - 2D v-momentum northern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -5.90505265E-02 Max =  1.30097330E-01)
  GET_NGFLD_NF90   - 3D u-momentum western boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.17800543E-01 Max =  1.88053504E-01)
  GET_NGFLD_NF90   - 3D v-momentum western boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -9.80424359E-02 Max =  1.03780635E-01)
  GET_NGFLD_NF90   - 3D u-momentum eastern boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.11881563E-01 Max =  6.41641393E-02)
  GET_NGFLD_NF90   - 3D v-momentum eastern boundary condition,            1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.42793653E-03 Max =  1.80536196E-01)
  GET_NGFLD_NF90   - 3D u-momentum southern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.18422651E-01 Max =  5.16503528E-02)
  GET_NGFLD_NF90   - 3D v-momentum southern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -7.56336078E-02 Max =  1.04001015E-01)
  GET_NGFLD_NF90   - 3D u-momentum northern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.17800543E-01 Max =  2.32712507E-01)
  GET_NGFLD_NF90   - 3D v-momentum northern boundary condition,           1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -1.02697045E-01 Max =  4.29768354E-01)
  GET_NGFLD_NF90   - temperature western boundary condition,              1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  1.56534815E+00 Max =  1.73289280E+01)
  GET_NGFLD_NF90   - salinity western boundary condition,                 1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  3.47999077E+01 Max =  3.61314888E+01)
  GET_NGFLD_NF90   - temperature eastern boundary condition,              1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  0.00000000E+00 Max =  6.41952801E+00)
  GET_NGFLD_NF90   - salinity eastern boundary condition,                 1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  0.00000000E+00 Max =  3.47344360E+01)
  GET_NGFLD_NF90   - temperature southern boundary condition,             1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  0.00000000E+00 Max =  1.73289280E+01)
  GET_NGFLD_NF90   - salinity southern boundary condition,                1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  0.00000000E+00 Max =  3.67239647E+01)
  GET_NGFLD_NF90   - temperature northern boundary condition,             1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.27357104E-01 Max =  8.21534252E+00)
  GET_NGFLD_NF90   - salinity northern boundary condition,                1980-02-15 00:00:00.00
                      (Grid= 01, Rec=2, Index=1, File: NorthSea4_bry_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  0.00000000E+00 Max =  3.52933426E+01)
  GET_2DFLD_NF90   - vertically integrated u-momentum climatology,        1980-02-15 00:00:00.00
                      (Grid=01, Rec=2, Index=2, File: NorthSea4_clim_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -1.52488455E-01 Max =  1.80523559E-01)   regrid = F
  GET_2DFLD_NF90   - vertically integrated v-momentum climatology,        1980-02-15 00:00:00.00
                      (Grid=01, Rec=2, Index=2, File: NorthSea4_clim_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -1.22916825E-01 Max =  5.94854176E-01)   regrid = F
  GET_3DFLD_NF90   - u-momentum component climatology,                    1980-02-15 00:00:00.00
                      (Grid=01, Rec=2, Index=2, File: NorthSea4_clim_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -3.57788324E-01 Max =  2.52148896E-01)
  GET_3DFLD_NF90   - v-momentum component climatology,                    1980-02-15 00:00:00.00
                      (Grid=01, Rec=2, Index=2, File: NorthSea4_clim_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.04003111E-01 Max =  5.95298827E-01)
  GET_3DFLD_NF90   - potential temperature climatology,                   1980-02-15 00:00:00.00
                      (Grid=01, Rec=2, Index=2, File: NorthSea4_clim_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min = -2.27357104E-01 Max =  1.73289280E+01)
  GET_3DFLD_NF90   - salinity climatology,                                1980-02-15 00:00:00.00
                      (Grid=01, Rec=2, Index=2, File: NorthSea4_clim_SODA_1980116_to_20201216.nc)
                      (Tmin=      11702.0000 Tmax=      26647.0000)   t =      11733.0000
                      (Min =  2.35256100E+01 Max =  3.67239647E+01)

 TIME-STEP YYYY-MM-DD hh:mm:ss.ss  KINETIC_ENRG   POTEN_ENRG    TOTAL_ENRG    NET_VOLUME
                     C => (i,j,k)       Cu            Cv            Cw         Max Speed

         0 1980-01-15 00:00:00.00  4.391850E-04  1.967342E+04  1.967342E+04  8.728795E+15
                     (105,089,30)  1.330296E-03  1.187236E-03  0.000000E+00  5.112583E-01
  DEF_HIS_NF90     - creating history file,            Grid 01: /projects/0/einf2878/output/run5/NorthSea4_his.nc
  WRT_HIS_NF90     - wrote history     fields (Index=1,1) in record = 1
  DEF_AVG_NF90     - creating average file,            Grid 01: /projects/0/einf2878/output/run5/NorthSea4_avg.nc
  DEF_RST_NF90     - creating restart file,            Grid 01: /projects/0/einf2878/output/run5/NorthSea4_rst.nc
  GET_NGFLD_NF90   - river runoff mass transport,                         1980-02-15 00:00:00.00
                      (Grid= 01, Rec=386, Index=2, File: Rivers_NorthSea4_smooth013_Dai2014_AnnualCycle_1948-2020.nc)
                      (Tmin=         14.0000 Tmax=      26678.0000)   t =      11733.0000
                      (Min =  3.06450009E+00 Max =  2.76373682E+03)
  GET_NGFLD_NF90   - river runoff potential temperature,                  1980-02-15 00:00:00.00
                      (Grid= 01, Rec=386, Index=2, File: Rivers_NorthSea4_smooth013_Dai2014_AnnualCycle_1948-2020.nc)
                      (Tmin=         14.0000 Tmax=      26678.0000)   t =      11733.0000
                      (Min =  5.21611187E-01 Max =  1.39371909E+01)
  GET_NGFLD_NF90   - river runoff salinity,                               1980-02-15 00:00:00.00
                      (Grid= 01, Rec=386, Index=2, File: Rivers_NorthSea4_smooth013_Dai2014_AnnualCycle_1948-2020.nc)
                      (Tmin=         14.0000 Tmax=      26678.0000)   t =      11733.0000
                      (Min =  0.00000000E+00 Max =  0.00000000E+00)
  GET_2DFLD_NF90   - surface u-wind component,                            1980-01-15 06:00:00.00
                      (Grid=01, Rec=43886, Index=1, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.2500
                      (Min = -1.87113965E+01 Max =  1.34406884E+01)   regrid = T
  GET_2DFLD_NF90   - surface v-wind component,                            1980-01-15 06:00:00.00
                      (Grid=01, Rec=43886, Index=1, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.2500
                      (Min = -1.77398206E+01 Max =  1.04592634E+01)   regrid = T
  GET_2DFLD_NF90   - surface air pressure,                                1980-01-15 06:00:00.00
                      (Grid=01, Rec=43886, Index=1, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.2500
                      (Min =  9.92491680E+02 Max =  1.03335276E+03)   regrid = T
  GET_2DFLD_NF90   - cloud fraction,                                      1980-01-15 06:00:00.00
                      (Grid=01, Rec=43886, Index=1, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.2500
                      (Min =  0.00000000E+00 Max =  1.00000000E+00)   regrid = T
  GET_2DFLD_NF90   - solar shortwave radiation flux,                      1980-01-16 00:00:00.00
                      (Grid=01, Rec=10973, Index=1, File: ERA5_NorthAtlantic_fc_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      26663.0000)   t =      11703.0000
                      (Min =  2.85609992E-07 Max =  3.07226137E-05)   regrid = T
  GET_2DFLD_NF90   - surface air temperature,                             1980-01-15 06:00:00.00
                      (Grid=01, Rec=43886, Index=1, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.2500
                      (Min = -1.76117774E+01 Max =  1.39217919E+01)   regrid = T
  GET_2DFLD_NF90   - surface air relative humidity,                       1980-01-15 06:00:00.00
                      (Grid=01, Rec=43886, Index=1, File: ERA5_NorthAtlantic_an_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      27028.7500)   t =      11702.2500
                      (Min =  5.10728765E-01 Max =  1.00009508E+00)   regrid = T
  GET_2DFLD_NF90   - rain fall rate,                                      1980-01-15 12:00:00.00
                      (Grid=01, Rec=21944, Index=1, File: ERA5_NorthAtlantic_fc_ForROMS.nc)
                      (Tmin=        731.0000 Tmax=      26663.0000)   t =      11702.5000
                      (Min =  2.58700700E-10 Max =  6.84934772E-04)   regrid = T
         1 1980-01-15 00:01:15.00           NaN           NaN           NaN           NaN
                     (000,000,00)  0.000000E+00  0.000000E+00  0.000000E+00 -1.000000E+20
 Found Error: 01   Line: 321      Source: ROMS/Nonlinear/main3d.F
 Found Error: 01   Line: 298      Source: ROMS/Drivers/nl_roms.h, ROMS_run

 Blowing-up: Saving latest model state into  RESTART file
     REASON: KEchar =      NaN, PEchar =      NaN
Attachments
comparison_clim_v_ora_soda_glorys.png
comparison_clim_UBAR_ora_soda_glorys.png
comparison_clim_u_ora_soda_glorys.png
comparison_clim_temp_ora_soda_glorys.png
comparison_clim_salt_ora_soda_glorys.png
ini_soda_v.png
ini_soda_u.png
log.txt
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iriskeizer

Re: ROMS Blows up on after first time step

#2 Unread post by iriskeizer »

For the figures:


These are the annual averages of the climatology lateral forcing file. Some figures compare annual values of temperature, salinity, sea level, momentum for the different forcing files. Some other figures show the initial values for momentum for the SODA forcing file, whereafter the model blows up.
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arango
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Re: ROMS Blows up on after first time step

#3 Unread post by arango »

Your model is blowing up right away. I think that it is blowing up in the barotropic kernel (step2d) because I suspect that your currents are becoming very high. That may be a CFL violation due to surface forcing or, more likely, to lateral boundary conditions data. You should compare that forcing or lateral boundary conditions data with your successful application.
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iriskeizer

Re: ROMS Blows up on after first time step

#4 Unread post by iriskeizer »

Thanks a lot for your reply


Yes, I compared the forcing files: those are the figures I sent before. I've now run ROMS changing the high current files, using for example a maximum of 0.4, 0.35, 0.3 or 0.1. However, I still get a blow up.

What else should I change you think?
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wilkin
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Re: ROMS Blows up on after first time step

#5 Unread post by wilkin »

From those plots it does appear that the English Channel is where blow-up is likely to occur, but the error flags grid point (i,j,k) = (0,0,0), not a local blow-up point.

Your initial and boundary values appear to be benign, so it is odd that the blow-up occurs on the very first step and is everywhere. I would look closely at whether the regridding of SODA has left NaN values in your initial conditions somewhere on land. You can't have that.

Since you have all these files, you could try starting with SODA boundary data but initial conditions from a different model that was stable.
John Wilkin: DMCS Rutgers University
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iriskeizer

Re: ROMS Blows up on after first time step

#6 Unread post by iriskeizer »

I got my model running. Indeed the problem was NaN values in one of the input files.
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