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WRF4 standard configuration at 2 km

gsrepsoper

New member
Good morning,
Is there any standard configuration for dynamics+physics namelist to run WRF4 (4.6.1) operationally at 2km ?
Meanwhile we take 4km one (attached) as a test but we want to run WRF operationally in our LAM-EPS AEMET-gSREPS at 2.5km.
Alfons and Juanjo
AEMET Predictability Team
 

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  • namelist.input
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I don't know of any "standard configuration" but in general, any physics/dynamics settings that work for 4km should also work at 2.5 km.
 
Depends. For 1km it should still be fine, but if you go well below 1km you'll be in the grey area where one of those scalable PBL schemes might be a better choice (e.g. pbl_physics= 11).

I think the following might be useful for you (taken from the UEMS version of WRF, but you should get a hint of the recommended parameters):


# PHYSICS_SUITE = HI-RES
#
# Note: The following namelist parameters were taken from the namelist.input.4km
# file included with the official NCAR WRF source code release. It was
# designed for a 4km primary domain with 1.33km and 444.4m child domains.
# you do not have to match the DX values in your configuration but it
# should be in the ballpark. Having a DX much less than 444m will likely
# require turning OFF the PBL scheme. See the LES physics suite below.
#
# Finally, you may also use this same suite for running a single nest. The
# UEMS will eliminate the 3rd row for you.
#
# &physics parameters:
#
# CU_PHYSICS = 0, 0, 0 None
# MP_PHYSICS = 8, 8, 8 New Thompson graupel scheme
# RA_LW_PHYSICS = 4, 4, 4 RRTMG scheme
# RA_SW_PHYSICS = 4, 4, 4 RRTMG scheme
# RADT = 10,10,10
# SF_SURFACE_PHYSICS = 2, 2, 2 Unified Noah LSM
# SF_SFCLAY_PHYSICS = 1, 1, 1
# BL_PBL_PHYSICS = 1, 1, 1
# BLDT = 0, 0, 0 Call PBL every timestep
# YSU_TOPDOWN_PBLMIX = 1 Turn ON
# SHCU_PHYSICS = 0 Avoid GRIMS shallow CU scheme
#
# &dynamics parameters:
#
# W_DAMPING = 0
# DIFF_OPT = 1, 1, 1
# KM_OPT = 4, 4, 4
# DIFF_6TH_OPT = 0, 0, 0
# DAMP_OPT = 3
# MOIST_ADV_OPT = 2, 2, 2
# SCALAR_ADV_OPT = 2, 2, 2
#
# &domains parameters:
#
# FEEDBACK = 1
# SMOOTH_OPTION = 0
#
#
# PHYSICS_SUITE = MESO-LES
#
# Note: The following namelist parameters were designed for running a nested mesoscale
# to LES simulation where the DX for each domain is 3000m -> 1000m -> 333.3m -> 111.1m.
#
# Finally, this suite was tested over the Midwest US, which is relatively flat.
# you may need to modify the configuration for complex terrain.
#
# &physics parameters:
#
# CU_PHYSICS = 0, 0, 0, 0 None
# MP_PHYSICS = 28, 28, 28, 28 Thompson Scheme
# RA_LW_PHYSICS = 4, 4, 4, 4 RRTMG scheme
# RA_SW_PHYSICS = 4, 4, 4, 4 RRTMG scheme
# RADT = 10,10,10,10
# SF_SURFACE_PHYSICS = 2, 2, 2, 2 Unified Noah LSM
# SF_SFCLAY_PHYSICS = 1, 1, 1, 1
# BL_PBL_PHYSICS = 1, 0, 0, 0 Yonsei University scheme
# BLDT = 0 Call PBL every timestep (For domain 1)
# YSU_TOPDOWN_PBLMIX = 1 Turn ON
# ICLOUD = 1
# SHCU_PHYSICS = 0 Avoid GRIMS shallow CU scheme
#
# &dynamics parameters:
#
# W_DAMPING = 0
# DIFF_OPT = 1, 2, 2, 2
# KM_OPT = 4, 5, 5, 5
# DIFF_6TH_OPT = 0, 0, 0
# DAMP_OPT = 3
# MOIST_ADV_OPT = 2, 2, 2
# SCALAR_ADV_OPT = 2, 2, 2
#
# &domains parameters:
#
# FEEDBACK = 1
# SMOOTH_OPTION = 0
#
#
# PHYSICS_SUITE = LES
#
# Note: The following namelist parameters were designed for running a nested LES
# simulation where the DX for each domain is 1000m -> 333.3m -> 111.1m. You
# may also use this same suite for running a single nest. The UEMS will
# eliminate the 3rd row.
#
# This configuration was taken from the test/em_real/namelist.input.pbl-les
# file included with the official NCAR WRF source code release.
#
# Finally, this suite was tested over the Midwest US, which is relatively flat.
# you may need to modify the configuration for complex terrain.
#
#
# &physics parameters:
#
# CU_PHYSICS = 0, 0, 0 None
# MP_PHYSICS = 8, 8, 8 New Thompson graupel scheme
# RA_LW_PHYSICS = 4, 4, 4 RRTMG scheme
# RA_SW_PHYSICS = 4, 4, 4 RRTMG scheme
# RADT = 10,10,10
# SF_SURFACE_PHYSICS = 2, 2, 2 Unified Noah LSM
# SF_SFCLAY_PHYSICS = 1, 1, 1
# BL_PBL_PHYSICS = 1, 0, 0 Yonsei University scheme
# BLDT = 0, 0, 0 Call PBL every timestep
# YSU_TOPDOWN_PBLMIX = 1 Turn ON
# ICLOUD = 1
# SHCU_PHYSICS = 0 Avoid GRIMS shallow CU scheme
#
# &dynamics parameters:
#
# W_DAMPING = 0
# DIFF_OPT = 1, 2, 2
# KM_OPT = 4, 3, 3
# DIFF_6TH_OPT = 0, 0, 0
# DAMP_OPT = 3
# MOIST_ADV_OPT = 2, 2, 2
# SCALAR_ADV_OPT = 2, 2, 2
#
# &domains parameters:
#
# FEEDBACK = 1
# SMOOTH_OPTION = 0
 
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