[Wrf-users] strange pattern in total precipitation plot (RAINC + RAINNC)
Jatin Kala
jatin.kala.jk at gmail.com
Tue Feb 26 14:45:27 MST 2013
hi,
You set feedback to one, hence the inner nests feed back to the outer nest, and results in strange precip patterns where the grids intersect.
See the doc on 2-way nesting. Unless you have a good reason, feedback should be set to zero. At least that's my opinion!
cheers,
Jatin.
On 26/02/2013, at 1:18 PM, mmkamal at uwaterloo.ca wrote:
> Hi,
>
> I run two simulation January 2002 and July 2002. I got strange pattern in the calculate total precipitation plot (RAINC + RAINNC). This pattern only appear in July simulation. I have checked the model run two times and could not find any problem. I look forward to hearing from you.
>
>
> Thanks
> Kamal
>
>
>
> ===================================
> Here is my namelist.input file
> ===================================
>
> &time_control
> run_days = 32,
> run_hours = 0,
> run_minutes = 0,
> run_seconds = 0,
> start_year = 2002, 2002, 2002,
> start_month = 07, 07, 07,
> start_day = 01, 01, 01,
> start_hour = 00, 00, 00,
> start_minute = 00, 00, 00,
> start_second = 00, 00, 00,
> end_year = 2002, 2002, 2002,
> end_month = 08, 08, 08,
> end_day = 01, 01, 01,
> end_hour = 00, 00, 00,
> end_minute = 00, 00, 00,
> end_second = 00, 00, 00,
> interval_seconds = 10800
> input_from_file = .true.,.true.,.true.,
> history_interval = 180, 180, 180,
> frames_per_outfile = 1000, 1000, 1000,
> restart = .false.,
> restart_interval = 28800,
> io_form_history = 2
> io_form_restart = 102
> io_form_input = 2
> io_form_boundary = 2
> auxinput4_inname = "wrflowinp_d<domain>"
> auxinput4_interval = 180, 180, 180,
> io_form_auxinput4 = 2,
> debug_level = 0
> /
>
> &domains
> time_step = 48,
> time_step_fract_num = 0,
> time_step_fract_den = 1,
> max_dom = 3,
> 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 = 0
> /
>
> &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 = 2, 2, 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 = 4,
> sf_urban_physics = 0, 0, 0,
> sst_update = 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 = 1,
> zdamp = 8000., 8000., 8000.,
> dampcoef = 0.03, 0.03, 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 = 0.1, 0.1, 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 = 5,
> spec_zone = 1,
> relax_zone = 4,
> specified = .true., .false.,.false.,
> spec_exp = 0.33,
> nested = .false., .true., .true.,
> /
>
> &grib2
> /
>
> &namelist_quilt
> nio_tasks_per_group = 0,
> nio_groups = 1,
> /
>
>
>
>
>
> <DAY_minus_WRF_Prcp.000003.png><DAY_minus_WRF_Prcp.000003.png>_______________________________________________
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> Wrf-users at ucar.edu
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