Nudging in [ ccpp_suite = 'FV3_GFS_v16' ]

[bnepal22]

I am currently using ccpp_suite = 'FV3_GFS_v16'. While trying to use nudging from reanalysis data with the below namelist options but I am getting an error : FATAL from PE 0: check_nml_error in fms_mod: Unknown namelist, or mistyped namelist variable in namelist fv_nwp_nudge_nml, (IOSTAT = 19 )

This is my namelist options for nudging. It was working well in FV3_GFS_v15p2.

&fv_nwp_nudge_nml
add_bg_wind = .false.
breed_srf_w = .false.
conserve_hgt = .false.
conserve_mom = .false.
do_ps_bias = .false.
ibtrack = .false.
nudge_debug = .false.
nudge_winds = .true.
nudge_virt = .true.
nudge_hght = .true.
time_varying = .true.
tau_winds = 21600. !< 6-hr
tau_virt = 21600. !< 6-hr
tau_hght = 21600. !< 6-hr
input_fname_list = "INPUT/nudg_data_list" ! inputs' list, full path needed
radius_nudging = 2000.e3
lat_cnt_nudging = 28.
lon_cnt_nudging = 85.
/

So my question is , has there been any change in the nudging name list from v15p2 to v16? If so, how to do nudging in v16?

[jdkublnick]

Hello bnepal22,

I have forwarded your question to the appropriate SME's. You will have a response shortly.

Thanks,

Joshua Kublnick

[mkavulich]

@bnepal22 can you please provide which version/hash of the weather model you are using? And have you made any changes to the code or any submodules?

[bnepal22]

@mkavulich , the version I am currently using is FV3_GFS_v15p2, which was compiled by my previous colleague, and just recently, I got to know that he has modified the source code (mainly fv_update_phys.F90, fv_io.F90, and fv_nudge.F90) so that nudging was working. However, such an edit was missing in my recent compilation of FV3_GFS_v16, which is why I was getting the error.