Ocean Modeling Discussion

Hello Patrick! Thank you very mush for this information, it really helps because after reading your article (2001) the question about dealing with current-related inflow/outflow in ROMS is, in fact, the only one that remained in my understanding, all other aspects of the model setup and OBCs ...

Clamping and nudging won't help you if you have an advection dominated outflow because the exterior conditions know nothing of the interior solution that is propagating out along characteristics of the current. They will act as a wall. You might be better off simply using gradient conditions, which ...

It looks like it is getting clearer to me now about possible ROMS configuration in my case (I believe I forgot to mention - I'm building a high-res Kara Sea regional model). Based on what I've heard here, I'll start with Flather+Chapman for ubar, vbar and zeta, and with RadNud for 3D variables with ...

Thank you for the reply, John! Yes, the computed phase speed estimation and its resemblance to the white noise near the open boundaries was also reported by Treguier et al. (2001), so it is a really well-known issue, and still one of the causes of critique imposed on modelers from mathematicians ...

Thank you for your reply, Kate! I did not provide the corresponding formulas used to compute the phase velocity, but I know that phase velocities Cx and Cy are computed separately for each variable along all open lateral boundaries. And that RadNud condition is applied separately for each variable ...

Dear all! After reading the paper by Marchesiello et al., 2001 "Open boundary conditions for long-term integration of regional ocean models" and several other ROMS-related articles, as well as almost all related topics here on the Forum, I still don't have a complete understanding of the RadNud ...