Search found 6 matches

by tongbo
Fri Apr 15, 2022 4:30 pm
Forum: ROMS Discussion
Topic: "gls" in the output file, and calculation of TKE dissipation
Replies: 7
Views: 10436

Re: "gls" in the output file, and calculation of TKE dissipation

It makes sense to me now. Thank you John for this very clear explanation.
by tongbo
Wed Apr 13, 2022 3:14 pm
Forum: ROMS Discussion
Topic: "gls" in the output file, and calculation of TKE dissipation
Replies: 7
Views: 10436

Re: "gls" in the output file, and calculation of TKE dissipation

Thank John and Greg for helping with this. Yes I think "gls" = "epsilon" for my case, so I can directly use the "gls" variable from the output file as dissipation. And I also compared the vertical distribution of gls (tke dissipation) and it is generally consistent with shear production. Below is ...
by tongbo
Tue Apr 12, 2022 9:14 pm
Forum: ROMS Discussion
Topic: "gls" in the output file, and calculation of TKE dissipation
Replies: 7
Views: 10436

Re: "gls" in the output file, and calculation of TKE dissipation

Hi John, Thanks a lot for this reply. I am well aware of this paper and the GLS method. I am just a bit confused by what ROMS writes in the output file. I think gls = epsilon for GLS k-epsilon closure, but according to the glossary in ocean.in, the output gls is always tke*l even if I am not using ...
by tongbo
Tue Apr 12, 2022 7:39 pm
Forum: ROMS Discussion
Topic: "gls" in the output file, and calculation of TKE dissipation
Replies: 7
Views: 10436

"gls" in the output file, and calculation of TKE dissipation

Hi all, I wondered what the "gls" is in the output file. It is "tke*l" ("l" is the generic length) according to the glossary I found in the .in file. So then I could calculate TKE dissipation using "epsilon = c_mu0^3*tke^1.5/l = c_mu0^3*tke^1.5/(gls/tke)" - I am using the GLS k-epsilon closure. But ...
by tongbo
Mon Dec 27, 2021 7:58 pm
Forum: ROMS Discussion
Topic: bottom boundary layer height calculation (Hbbl)
Replies: 2
Views: 3581

Re: bottom boundary layer height calculation (Hbbl)

Thank you so much! I'll take a look at that section.
by tongbo
Sun Dec 26, 2021 8:48 pm
Forum: ROMS Discussion
Topic: bottom boundary layer height calculation (Hbbl)
Replies: 2
Views: 3581

bottom boundary layer height calculation (Hbbl)

Hi all, I wondered how the bottom boundary layer height is calculated in ROMS. I noticed there is an Hbbl variable that can be directly written in the history files, but does anyone know how that was calculated in the code, and is there any way that I can calculate it using other model output ...