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Question on running with Morrison (microphysics) Scheme

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wjxaly

New member
I am running a cloud-permitting configuration with 3 km resolution. I have tried to used Morrison 2 moment MP scheme, but the model dumped after a few hours simulation. I tried to decrease time step to 10s but it still doesn't work. Could you help me to check why it failed?

The namelist I used is as follows:

&domains
time_step = 10,
time_step_fract_num = 0,
time_step_fract_den = 1,
max_dom = 1,
e_we = 2200,
e_sn = 1100,
e_vert = 41,
p_top_requested = 3500,
num_metgrid_levels = 38,
num_metgrid_soil_levels = 4,
dx = 3000.000,
dy = 3000.000,
grid_id = 1,
parent_id = 0,
i_parent_start = 0,
j_parent_start = 0,
parent_grid_ratio = 1,
parent_time_step_ratio = 1,
feedback = 1,
smooth_option = 0,

&physics
mp_physics = 10,
mp_zero_out = 2,
mp_zero_out_thresh = 1.e-8,
do_radar_ref = 1,
ra_lw_physics = 4,
ra_sw_physics = 5,
radt = 3,
sf_sfclay_physics = 1,
sf_surface_physics = 2,
bl_pbl_physics = 1,
bldt = 0,
cu_physics = 0,
cudt = 0,
isfflx = 1,
ifsnow = 1,
icloud = 1,
surface_input_source = 1,
num_soil_layers = 4,
sf_urban_physics = 0,
sst_update = 1,

&dynamics
w_damping = 0,
diff_opt = 2,
km_opt = 4,
diff_6th_opt = 0,
diff_6th_factor = 0.12,
base_temp = 290.
damp_opt = 3,
zdamp = 3000.,
dampcoef = 0.1,
khdif = 0,
kvdif = 0,
non_hydrostatic = .true.,
moist_adv_opt = 1,
scalar_adv_opt = 1,
 
Hi,
1) Can you let me know which version of WRF you are using?
2) Did you try other identical cases, but with a different microphysics scheme that worked without problems?
3) Can you attach your full namelist.input file - to attach files, while the text box is open, click on the tab with 3 horizontal lines and follow directions for attaching files.
4) Can you also attach your output file(s). For example, if you are running with distributed memory, you should have several rsl.error.* files. Please package all of those together as a *.TAR file and attach that.
Thanks!
 
Thank you for that information. Take a look at this page that describes the problem with the Morrison scheme in that version of the code:
https://www2.mmm.ucar.edu/wrf/users/wrfv3.7/known-prob-3.7.1.html
 
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