Ocean Modeling Discussion

Hi all, In the ROMS-SWAN coupling system, the radiation stress is added in the momentum equation in ROMS. In return it should also contribute to the wave. But there is no radiation stress terms in the governing equation used in SWAN.(Is it implicit in the equation?) It's not consistent if only one-w...

I referred to equation 6 ---The Doppler (or advective) velocity. I used this velocity to advect the action density(N)in SWAN. I still use the same one when calculating the relative wind speed(uwind-ucurrent) for use in source term, which I think surface current velocity should be a better choice. Al...

I used the wave related depth weighted velocity as the doppler velocity from George L. Mellor 《A Surface Wave Model for Coupling with Numerical Ocean Circulation Models》. I can send you if you want it. yes. For 2D it sends ubar. For 3D it sends the surface currents. However, for 3D this perhaps shou...

I commented below options in swan_inlet.in as suggested by jacopo and ROMS coupling code gave the same wave height pattern as SWAN. && KEYWORD TO CREATE BOTTOM FRICTION GRID && INPGRID FRIC CURVILINEAR 0 0 76 71 EXC 9.999000e+003 & NONSTAT 20000101.000000 25 DAY 20000126.000000 B...

I think I find the problem.I plotted the wave height and it seems there is no friction to the wave. That's why the wave keep increase when shoaling. So in this case with extremely small current(1e-15),the friction to wave is gone, this is not reasonable. Is that good to have z0 fed back to wave? Fro...

By running the two way coupling code with 1)ubar,vbar,zeta set to zero 2)no morphology, is that the same as we run the SWAN code(except the computing efficency)?

Hi jacopo, I didn't comment this && KEYWORD TO CREATE BOTTOM FRICTION GRID && INPGRID FRIC CURVILINEAR 0 0 76 71 EXC 9.999000e+003 & NONSTAT 20000101.000000 25 DAY 20000126.000000 from ocean_his.nc Zo varies spatially but time invariant. When I try to plot the fric.mat , matlab s...

Hi warner, For small values I mean velocity and water level(~1E-15) because I set tide amplitude at boundary to zero and undef MEARSHORE_MELLOR(no wave radiation stress forcing). weight height ranges from 0 to 1 but has very strong interaction at the mouth of the inlet. My question is, with this sma...

‘apparent wind’ means relative wind(Uwind-Ucurrent),am I right?actually current influences wave more than that way(like influence on wave propagation,doppler shift,etc) But in this case wave is forced by open boundary and no wind is input. Besides the Ucurrent is very small(~1e-15,probably numeric),...

Hi All, I used the inlet test case to test the wave code in the coupling code. I made two change of the inlet two-way couple case, 1)set tide amplitude at boundary equal to zero(0.0_r8). 2)undefine NEARSHORE_MELLOR and SED_MORPH All other options are kept.It is supposed to get a result as if I ran w...

Thanks jcwarner.

Hi all, I am confused about two varibles in sediment model:tau_ce and tau_cd,i.e.,critical erosion stress and critical deposition stress. In the code the sediment start erosion when the bottom stress is above tau_ce, but I find that tau_cd is never used in the model although read from sediment.in. M...