Zero values for turbulent kinetic energy (tke_pbl) while using MYNN 2.5 pbl scheme

[Lakshman_179]

Hello everyone,

I run wrf model v 4.3 and using MYNN level 2.5 pbl scheme , i am interested in tke_pbl but it is showing zero values for every level and i tried with different cases, again it gives zero values. what is the reason for this?

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&physics

mp_physics = 6, 6, 6,
ra_lw_physics = 1, 1, 1,
ra_sw_physics = 2, 2, 2,
radt = 10, 10, 10,
sf_sfclay_physics = 2, 2, 2,
sf_surface_physics = 2, 2, 2,
bl_pbl_physics = 5, 5, 5,
bl_mynn_edmf_mom = 1, 1, 1,
bl_mynn_edmf_tke = 1, 1, 1,
bl_mynn_edmf = 1, 1, 1,
bldt = 0, 0, 0,
cu_physics = 1, 1, 1,

Many thanks in advance for your help,

Best Regards,
Lakshman​

 

[Deevi Prathima]

Hi lakshman,
Can you pls try editing your namelist.input in &physics as follows..:

bl_mynn_tkebudget (max_dom) (new since V3.4.1)

0

(default) off

1

adds MYNN tke budget terms to output

I hope it may work .

 

[cfbalseiro]

I'm having the same problem but with WRF 4.5 version.

I'm using the same options as Lakshman, with tke_budget = 1 for the WRF 4.5 version, but TKE_PBL values are always 0.0.

Do you know if I need to activate any other parameter?

Regards!!

 

[Ming Chen]

TKE_PBL == 0 because MYNN PBL no longer output this variable. However the variable QKE is output and it is twice TKE.

 

[cfbalseiro]

Thank you very much for your response!

Carlos.