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"This shallow cumulus option requires ice microphysics option: f_qi = F"

mikemaddenwx

New member
Good afternoon,

I am using WRF version 3.9.1, and I'm attempting to use Park and Bretherton shallow cumulus scheme from CAM5 (shcu_physics = 2). When I run wrf.exe, the model will crash after about 30 seconds. The error message states:

-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: <stdin> LINE: 398
This shallow cumulus option requires ice microphysics option: f_qi = F

When I look at the code, I cannot immediately identify what f_qi is exactly, and I have attempted to run this model with many different microphysics schemes. I have tried mp_physics as 8 (Thompson), 11 (CAM 5.1 microphysics), 9 (Milbrandt-Yau), 19 (NSSL 1-moment 7-class), and 10 (Morrison), and no option has gotten me past this error.

I have attached the physics portion of my namelist.input. Note the model runs with a 3-km grid-spacing.

&physics
mp_physics = 10, 8, 3,
ra_lw_physics = 4, 4, 1,
ra_sw_physics = 4, 4, 1,
radt = 3, 4, 2,
sf_sfclay_physics = 2, 1, 1,
sf_surface_physics = 2, 2, 2,
bl_pbl_physics = 2, 1, 1,
bldt = 0, 0, 0,
cu_physics = 0, 0, 0,
cudt = 0, 5, 5,
isfflx = 1,
ifsnow = 1,
icloud = 1,
surface_input_source = 3,
num_soil_layers = 4,
num_land_cat = 21,
sf_urban_physics = 1, 1, 1,
shcu_physics = 2,
/

How can this be resolved?

Thank you very much,
Mike
 
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