Issue with multi-domain spectral nudging associated with the namelist variable gph

[rborgers97]

Hi,

I have been doing simulations with spectral nudging and noticed that geopotential nudging is turned off when the coefficient gph is not defined separately for each domain. However, in the user guide (section namelist variables) it is stated that gph is single entry.

My nudging settings:

&fdda
grid_fdda = 2, 2, 2, 0,
gfdda_inname = "wrffdda_d<domain>",
gfdda_interval_m = 60,60,60,60,
gfdda_end_h = 48,48,48,48,
guv = 0.0003,0.0003,0.0003,0.0000,
gt = 0.0003,0.0003,0.0003,0.0000,
gq = 0.0003,0.0003,0.0003,0.0000,
gph = 0.0003,
if_no_pbl_nudging_ph = 0,0,0,0,
if_no_pbl_nudging_t = 0,0,0,0,
if_no_pbl_nudging_q = 0,0,0,0,
if_no_pbl_nudging_uv = 0,0,0,0,
xwavenum = 10,6,3,1,
ywavenum = 10,6,3,1,
/

When specifying gph for each domain individually, the spectral nudging is activated. Am I doing something wrong or should there be an update to the user guide?

Thanks,
Ruben

 

[Ming Chen]

Sorry for the error in WRF User's Guide. You are right that gph should be defined for each domain.
Please let me know which version of WRF User's Guide you are looking at. I will ask my colleague to update it accordingly.

 

[rborgers97]

I am looking here: Namelist Variables — WRF Users Guide documentation

 

[kwerner]

@rborgers97,
Thanks for bringing this to our attention. I've updated the Users Guide to reflect the correct information.