Nonbreaking waveinduced mixing in ROMS?
 jivica
 Posts: 139
 Joined: Mon May 05, 2003 2:41 pm
 Location: The University of Western Australia, Perth, Australia
Nonbreaking waveinduced mixing in ROMS?
Dear ROMS users,
before duplicating already done job I am wondering if someone already did it?
I am looking into the additional mixing (via ke turbulence) with NONBREAKING(!) waves as additional term in the
shear production term (along with shear and bouy2) as a function of depth, Hs and frequency (Aijaz et. al., 2017; Babanin & Chalikov 2012)
Aijaz, S., M. Ghantous, A. V. Babanin, I. Ginis, B. Thomas, and G. Wake (2017),
Nonbreaking waveinduced mixing in upper ocean during tropical cyclones using coupled hurricaneoceanwave modeling, J. Geophys. Res. Oceans, 122, 3939–3963, doi:10.1002/ 2016JC012219.
Babanin, A. V., and D. Chalikov (2012), Numerical investigation of turbulence generation in nonbreaking potential waves, J. Geophys. Res.,
117, C00J17, doi:10.1029/2012JC007929.
Thanks
Ivica
before duplicating already done job I am wondering if someone already did it?
I am looking into the additional mixing (via ke turbulence) with NONBREAKING(!) waves as additional term in the
shear production term (along with shear and bouy2) as a function of depth, Hs and frequency (Aijaz et. al., 2017; Babanin & Chalikov 2012)
Aijaz, S., M. Ghantous, A. V. Babanin, I. Ginis, B. Thomas, and G. Wake (2017),
Nonbreaking waveinduced mixing in upper ocean during tropical cyclones using coupled hurricaneoceanwave modeling, J. Geophys. Res. Oceans, 122, 3939–3963, doi:10.1002/ 2016JC012219.
Babanin, A. V., and D. Chalikov (2012), Numerical investigation of turbulence generation in nonbreaking potential waves, J. Geophys. Res.,
117, C00J17, doi:10.1029/2012JC007929.
Thanks
Ivica
Re: Nonbreaking waveinduced mixing in ROMS?
Hi Ivica  Good luck! I stole some code from MOM6 for Langmuir mixing in KPP that I'm playing with. Seems to be an active area of research!
Re: Nonbreaking waveinduced mixing in ROMS?
For wave‐induced vertical mixing in KPP, see Wang et al., JGR 2010, based on Qiao et al, JPO 2004. It is now part of CROCO (ROMS_AGRIF)
Re: Nonbreaking waveinduced mixing in ROMS?
Yes, it's done by Wang et al., JGR 2010 based on Qiao et al, JPO 2004. I added it as a one of the switches (option) for vertical turbulent mixing (lmd_vmix) to the CPP options list (ROMS 3.7), and is running now for the MidAtlantic Bight application . To extract wave induced mixing parameter (Bv: m2/s) user need to run the MASNUM model.Please take a look to the attached file.
Cheers,
Farshid
Cheers,
Farshid
 Attachments

 bv.pdf
 (19.05 MiB) Downloaded 135 times
Re: Nonbreaking waveinduced mixing in ROMS?
Some of us are too lazy to run a wave model. Check out:
! Li, Q. and B. FoxKemper, 2017: Assessing the effects of Langmuir !
! turbulence on the entrainment buoyancy flux in the ocean surface !
! boundary layer, JPO, DOI: 10.1175/JPOD170085.1 !
! !
! Li, Q., B. FoxKemper, Ø. Breivik, and Adrean Webb, 2017: !
! Statistical models of global Langmuir mixing, Ocean Modelling, !
! DOI: 10.1016/j.ocemod.2017.03.016
Re: Nonbreaking waveinduced mixing in ROMS?
Hi Kate, note that nonbreakingwaveinduced mixing and Langmuir turbulence are generally considered two different processes of waveinduced mixing (related to Stokes drift)... Patrick
 jivica
 Posts: 139
 Joined: Mon May 05, 2003 2:41 pm
 Location: The University of Western Australia, Perth, Australia
Re: Nonbreaking waveinduced mixing in ROMS?
Thanks for all responses!
Farhid in which version of ROMS you've implemented it?
Looking in Rutger's version and lmd_vmix.F there is only diffusivity due to the internal waves and not because of surface wind induced waves?
lmd_vmix.F
Patrick,
you have put nonbreaking surface wind wave effect into kpp in CROCO? Please if you can point me into which subroutine I should look.
My intention is to put it into gls, it should go into shear production term as addition "W"
\begin{equation}
\ni (M^2 + \alpha N^2) + W
\end{equation}
If you have information about wind induced waves from spectral model (or via coupling) it should be straight forward.
W is simple function of H_S is significant wave height, \omega is peak angular frequency, k is wavenumber, z is depth:
\begin{equation}
W = 0.0014 * k (\frac{\omega H_s}{2) e^{kz})^3
\end{equation}
Thanks!
Ivica
Farhid in which version of ROMS you've implemented it?
Looking in Rutger's version and lmd_vmix.F there is only diffusivity due to the internal waves and not because of surface wind induced waves?
lmd_vmix.F
Code: Select all
! Compute interior diffusivity due to wave breaking (Gargett and
! Holloway.
you have put nonbreaking surface wind wave effect into kpp in CROCO? Please if you can point me into which subroutine I should look.
My intention is to put it into gls, it should go into shear production term as addition "W"
\begin{equation}
\ni (M^2 + \alpha N^2) + W
\end{equation}
If you have information about wind induced waves from spectral model (or via coupling) it should be straight forward.
W is simple function of H_S is significant wave height, \omega is peak angular frequency, k is wavenumber, z is depth:
\begin{equation}
W = 0.0014 * k (\frac{\omega H_s}{2) e^{kz})^3
\end{equation}
Thanks!
Ivica
Re: Nonbreaking waveinduced mixing in ROMS?
Dear Ivica,
Please have a look to "lmd_vmix.F " and the section, regarding to "Sum contributions due to internal wave breaking...", in fact nonbreaking wave induced coefficient (Bv(i,j,k); (m2/s)) here is used to enhance the vertical mixing for momentum (Akv(i,j,k); (m2/s)) and tracer (Akt(i,j,k); (m2/s)) respectively.
Akv* = Akv + Bv (1)
Akt* = Akt + cBv (2)
where "c" is weighting coefficient of wave‐induced mixing (Yonggang Wang et al. 2010).
Cheers,
Farshid
Please have a look to "lmd_vmix.F " and the section, regarding to "Sum contributions due to internal wave breaking...", in fact nonbreaking wave induced coefficient (Bv(i,j,k); (m2/s)) here is used to enhance the vertical mixing for momentum (Akv(i,j,k); (m2/s)) and tracer (Akt(i,j,k); (m2/s)) respectively.
Akv* = Akv + Bv (1)
Akt* = Akt + cBv (2)
where "c" is weighting coefficient of wave‐induced mixing (Yonggang Wang et al. 2010).
Cheers,
Farshid
 Attachments

 Yonggang Wang et al 2010.pdf
 (12.2 MiB) Downloaded 115 times

 Qiao_et_al2004Geophysical_Research_Letters.pdf
 (1.19 MiB) Downloaded 92 times