<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Dear all,</div><div><br></div><div>I`m currently running WRF Version 3.9 with 35 specified eta_levels, for the default vertical levels are not dense enough to study the boundary layer phenomenon. However, the calcution always stopped at just few seconds. </div><div><br></div><div>I have checked rsl.out.* and rsl.error.* files, and there`s no obvious error message.</div><div><br></div><div>I wonder if it is related to the numerically unstable issues, so I have tried different timestep such as 81, 54, 27, 18 ad 6s, but still got CFL prints in the rsl.* files.</div><div><br></div><div>Can anyone figure out the reason? <span style="line-height: 1.7;">Or how can I get more detailed error message? Looking forward to your suggestion.</span></div><div><br></div><div>Here`s my namelist.input :</div><div><div> &time_control</div><div> run_days                            = 0,</div><div> run_hours                           = 42,</div><div> run_minutes                         = 0,</div><div> run_seconds                         = 0,</div><div> start_year                          = 2016, 2016, 2016, 2016,</div><div> start_month                         = 12,   12,   12,   12,</div><div> start_day                           = 06,   06,   06,   06,</div><div> start_hour                          = 00,   00,   00,   00,</div><div> start_minute                        = 00,   00,   00,   00,</div><div> start_second                        = 00,   00,   00,   00,</div><div> end_year                            = 2016, 2016, 2016, 2016,</div><div> end_month                           = 12,   12,   12,   12,</div><div> end_day                             = 07,   07,   07,   07,</div><div> end_hour                            = 18,   18,   18,   18,</div><div> end_minute                          = 00,   00,   00,   00,</div><div> end_second                          = 00,   00,   00,   00,</div><div> interval_seconds                    = 21600</div><div> input_from_file                     = .true., .true., .true., .true.,</div><div> history_interval                    = 1440,   720,    720,    60,  </div><div> frames_per_outfile                  = 1000,   1000,   1000,   1000,</div><div> restart                             = .false.,</div><div> restart_interval                    = 3000,</div><div> io_form_history                     = 2,</div><div> io_form_restart                     = 2,</div><div> io_form_input                       = 2,</div><div> io_form_boundary                    = 2,</div><div> debug_level                         = 0,</div><div> /</div><div><br></div><div> &domains</div><div><br></div><div> eta_levels                          = 1.00,    0.9975,  0.995,   0.9925,  0.99, </div><div>                                       0.985,   0.98,    0.975,   0.97,    0.965,</div><div>                                       0.96,    0.95,    0.94,    0.93,    0.92,</div><div>                                       0.91,    0.90,    0.89,    0.88,    0.87,</div><div>                                       0.86,    0.85,    0.84,    0.82,    0.80,</div><div>                                       0.75,    0.70,    0.65,    0.60,    0.50,</div><div>                                       0.40,    0.30,    0.20,    0.10,    0.00,</div><div> time_step                           = 6,</div><div> time_step_fract_num                 = 0,</div><div> time_step_fract_den                 = 1,</div><div> max_dom                             = 4,</div><div> e_we                                = 200,   178,   187,   205,</div><div> e_sn                                = 200,   190,   193,   205,</div><div> e_vert                              = 35,    35,    35,    35,</div><div> p_top_requested                     = 10000,</div><div> num_metgrid_levels                  = 32,</div><div> num_metgrid_soil_levels             = 4,</div><div> dx                                  = 27000, 9000,  3000,  1000,</div><div> dy                                  = 27000, 9000,  3000,  1000,</div><div> grid_id                             = 1,     2,     3,     4,</div><div> parent_id                           = 1,     1,     2,     3,</div><div> i_parent_start                      = 1,     73,    57,    46,</div><div> j_parent_start                      = 1,     69,    65,    63,</div><div> parent_grid_ratio                   = 1,     3,     3,     3,</div><div> parent_time_step_ratio              = 1,     3,     3,     3,</div><div> feedback                            = 1,</div><div> smooth_option                       = 0,</div><div> /</div><div><br></div><div> &physics</div><div> mp_physics                          = 2,     2,     2,     2,</div><div> ra_lw_physics                       = 4,     4,     4,     4,</div><div> ra_sw_physics                       = 4,     4,     4,     4,</div><div> aer_opt                             = 2,</div><div> aer_aod550_opt                      = 1,     1,     1,     1,</div><div> aer_aod550_val                      = 0.12,  0.12,  0.12,  1.0,</div><div> sf_sfclay_physics                   = 1,     1,     1,     1,</div><div> sf_surface_physics                  = 2,     2,     2,     2,</div><div> bl_pbl_physics                      = 1,     1,     1,     1,</div><div> cu_physics                          = 1,     0,     0,     0,</div><div> radt                                = 27,    9,     3,     1,</div><div> bldt                                = 0,     0,     0,     0,</div><div> cudt                                = 5,     5,     5,     5,</div><div> isfflx                              = 1,</div><div> ifsnow                              = 0,</div><div> icloud                              = 1,</div><div> num_soil_layers                     = 4,</div><div> num_land_cat                        = 21,</div><div> sf_urban_physics                    = 1,     1,     1,     1,</div><div> slope_rad                           = 0,     0,     0,     1,</div><div> topo_shading                        = 0,     0,     0,     1,</div><div> topo_wind                           = 0,     0,     0,     0,</div><div> /</div><div><br></div><div> &fdda</div><div> /</div><div><br></div><div> &dynamics</div><div> w_damping                           = 0,</div><div> diff_opt                            = 1,     1,     1,     1,</div><div> km_opt                              = 4,     4,     4,     4,</div><div> diff_6th_opt                        = 0,     0,     0,     0,</div><div> diff_6th_factor                     = 0.12,  0.12,  0.12,  0.12,</div><div> base_temp                           = 290.,</div><div> damp_opt                            = 0,</div><div> zdamp                               = 5000., 5000., 5000., 5000.,</div><div> dampcoef                            = 0.2,   0.2,   0.2,   0.2,</div><div> khdif                               = 0,     0,     0,     0,</div><div> kvdif                               = 0,     0,     0,     0,</div><div> non_hydrostatic                     = .true.,.true.,.true.,.true.,</div><div> moist_adv_opt                       = 1,     1,     1,     1,</div><div> scalar_adv_opt                      = 1,     1,     1,     1,</div><div> /</div><div><br></div><div> &bdy_control</div><div> spec_bdy_width                      = 5,</div><div> spec_zone                           = 1,</div><div> relax_zone                          = 4,</div><div> specified                           = .true., .false.,.false.,.false.,</div><div> nested                              = .false., .true., .true.,.true.,</div><div> /</div><div><br></div><div> &grib2</div><div> /</div><div><br></div><div> &namelist_quilt</div><div> nio_tasks_per_group = 0,</div><div> nio_groups = 1,</div><div> /</div></div><div><br></div><div><span style="line-height: 1.7;">Cheers,</span></div><div>Tian Yue</div></div><br><br><span title="neteasefooter"><p> </p></span>