[Wrf-users] WRF run cursing with RUC LSM after 2/3 days

[mmkamal at uwaterloo.ca]

Hi,

I'm having a problem with the RUC LSM in WRF v3.3. Model is cursing  
with RUC LSM after 2/3 days. I am running WRF at 8 km and 2.67 km  
horizontal resolution over the Great Lakes Basin. I have played with  
different dumping options and damping coefficient. I have reduced  
integration time steps up to 4 second. Model stopped after two days  
with 48 second (6*8km) integration time and stopped after 4 days with  
8 second. I have looked at output variables and looks fine. I set  
debug level up to 150 and find no error message in the log file. There  
is no CFL error as well.

Surprisingly, model shows no problem while simulating July month. The  
problem is happening in December. I have compiled WRF using IBM's AIX  
compiler. Here you go parts of my namelist.input


==========================
&domains
  time_step                           = 4,
  time_step_fract_num                 = 0,
  time_step_fract_den                 = 1,
  max_dom                             = 2,
  e_we                                = 225,   214,   244,
  e_sn                                = 175,   211,   271,
  e_vert                              = 28,    28,    28,
  p_top_requested                     = 10000,
  num_metgrid_levels                  = 30,
  num_metgrid_soil_levels             = 4,
  dx                                  = 8000, 2666.666,  888.888,
  dy                                  = 8000, 2666.666,  888.888,
  grid_id                             = 1,     2,     3,
  parent_id                           = 1,     1,     2,
  i_parent_start                      = 1,     68,    70,
  j_parent_start                      = 1,     65,    50,
  parent_grid_ratio                   = 1,     3,     3,
  parent_time_step_ratio              = 1,     3,     3,
  feedback                            = 1,
  smooth_option                       = 1
  /

  &physics
  mp_physics                          = 6,     6,     6,
  ra_lw_physics                       = 1,     1,     1,
  ra_sw_physics                       = 1,     1,     1,
  radt                                = 8,     8,     8,
  sf_sfclay_physics                   = 1,     1,     1,
  sf_surface_physics                  = 3,     3,     2,
  bl_pbl_physics                      = 1,     1,     1,
  bldt                                = 0,     0,     0,
  cu_physics                          = 1,     0,     0,
  cudt                                = 5,     5,     5,
  isfflx                              = 1,
  ifsnow                              = 0,
  icloud                              = 1,
  surface_input_source                = 1,
  num_soil_layers                     = 6,
  sf_urban_physics                    = 0,     0,     0,
  sst_update                          = 1,
  tmn_update                          = 1,
  lagday                              = 150,
  sst_skin                            = 1,
  num_land_cat                        = 28
/

  &dynamics
  rk_ord                              = 3,
  diff_opt                            = 1,
  km_opt                              = 4,
  diff_6th_opt                        = 2,      2,      2,
  diff_6th_factor                     = 0.06,   0.06,   0.06,
  damp_opt                            = 3,
  zdamp                               = 5000.,   5000.,  8000.,
  dampcoef                            = 0.3,    0.3,  0.03,
  w_damping                           = 1,
  base_pres                           = 100000.,
  base_temp                           = 290.
  base_lapse                          = 50.,
  iso_temp                            = 0.,
  smdiv                               = 0.1,    0.1,    0.1,
  emdiv                               = 0.01,   0.01,   0.01
  epssm                               = 1.0,    1.0,    0.1
  non_hydrostatic                     = .true., .true., .true.,
  h_mom_adv_order                     = 5,      5,      5,
  v_mom_adv_order                     = 3,      3,      3,
  h_sca_adv_order                     = 5,      5,      5,
  v_sca_adv_order                     = 3,      3,      3,
  time_step_sound                     = 4,      4,      4,
  moist_adv_opt                       = 1,      1,      1,
  scalar_adv_opt                      = 1,      1,      1,
  tke_adv_opt                         = 1,      1,      1,
  khdif                               = 0,      0,      0,
  kvdif                               = 0,      0,      0,

  /

  &bdy_control
  spec_bdy_width                      = 10,
  spec_zone                           = 1,
  relax_zone                          = 9,
  specified                           = .true., .false.,.false.,
  spec_exp                            = 0.33,
  nested                              = .false., .true., .true.,
  /

==================

Has anyone else encountered similar problems with RUC LSM in WRF  
v3.3?any help would be greatly appreciated.


Thanks
Kamal