too large surface velocity

[cheng_dada]

Hello everyone,
I am running a test, and the surface velocity in the ROMS result file is obviously too large compared with hycom.
roms result:

hycom data:

Then I output uwind and vwind in his file, and compared with the input wind field of 10m, the output uwind of roms is also too large.
roms:

GFS:

Is that normal? Is my excessive surface flow a problem with the wind field?
I defined bulk_fluxes to calculate wind stress. I saw on the forum that the wind stress calculated by bulk_fluxes would be too large. Is this the reason?
this is my define file:

log file:

2024051300.dat

(1.25 MiB) Downloaded 76 times

[wilkin]

Judging from your plots the geometry of your grids is simple east-west rectangular coordinates. But the log reports a range of values for angler from -90 degrees to 270 degrees:

Grid 01:

Code: Select all

  GET_GRID_NF90    - angle between XI-axis and EAST: angler
                      (Grid = 01, File: /home/roms/input/NH_grid.nc)
                      (Min = -1.57079633E+00 Max =  4.71238359E+00)

(Values are in radians)

You might be unwittingly rotating your winds.

Moreover, for Grid 02 you have

Code: Select all

  GET_GRID_NF90    - angle between XI-axis and EAST: angler
                      (Grid = 02, File: /home/roms/input/ZH_roms_grid_ref5.nc)
                      (Min = -1.57084583E+00 Max = -1.57071597E+00)

which suggests everything gets rotated by -90 degrees.