Nonbreaking wave-induced mixing in ROMS?

General scientific issues regarding ROMS

Moderators: arango, robertson

Post Reply
Message
Author
User avatar
jivica
Posts: 135
Joined: Mon May 05, 2003 2:41 pm
Location: The University of Western Australia, Perth, Australia

Nonbreaking wave-induced mixing in ROMS?

#1 Post by jivica » Thu May 31, 2018 5:27 am

Dear ROMS users,

before duplicating already done job I am wondering if someone already did it?

I am looking into the additional mixing (via k-e 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 wave-induced mixing in upper ocean during tropical cyclones using coupled hurricane-ocean-wave 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 non-breaking potential waves, J. Geophys. Res.,
117, C00J17, doi:10.1029/2012JC007929.


Thanks
Ivica

User avatar
kate
Posts: 3780
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: Nonbreaking wave-induced mixing in ROMS?

#2 Post by kate » Thu May 31, 2018 6:00 am

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!

User avatar
patrickm
Posts: 24
Joined: Fri Apr 30, 2004 6:41 pm
Location: IRD, FRANCE
Contact:

Re: Nonbreaking wave-induced mixing in ROMS?

#3 Post by patrickm » Fri Jun 01, 2018 5:54 am

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)

fdaryabor
Posts: 78
Joined: Wed Jan 02, 2008 3:15 pm
Location: University of Copenhagen

Re: Nonbreaking wave-induced mixing in ROMS?

#4 Post by fdaryabor » Fri Jun 01, 2018 3:07 pm

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 :arrow: (lmd_vmix) to the CPP options list (ROMS 3.7), and is running now for the Mid-Atlantic Bight application :idea: . 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
Attachments
bv.pdf
(19.05 MiB) Downloaded 114 times

User avatar
kate
Posts: 3780
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: Nonbreaking wave-induced mixing in ROMS?

#5 Post by kate » Fri Jun 01, 2018 4:34 pm

Some of us are too lazy to run a wave model. Check out:
! Li, Q. and B. Fox-Kemper, 2017: Assessing the effects of Langmuir !
! turbulence on the entrainment buoyancy flux in the ocean surface !
! boundary layer, JPO, DOI: 10.1175/JPO-D-17-0085.1 !
! !
! Li, Q., B. Fox-Kemper, Ø. Breivik, and Adrean Webb, 2017: !
! Statistical models of global Langmuir mixing, Ocean Modelling, !
! DOI: 10.1016/j.ocemod.2017.03.016

User avatar
patrickm
Posts: 24
Joined: Fri Apr 30, 2004 6:41 pm
Location: IRD, FRANCE
Contact:

Re: Nonbreaking wave-induced mixing in ROMS?

#6 Post by patrickm » Sat Jun 02, 2018 5:33 am

Hi Kate, note that nonbreaking-wave-induced mixing and Langmuir turbulence are generally considered two different processes of wave-induced mixing (related to Stokes drift)... Patrick

User avatar
jivica
Posts: 135
Joined: Mon May 05, 2003 2:41 pm
Location: The University of Western Australia, Perth, Australia

Re: Nonbreaking wave-induced mixing in ROMS?

#7 Post by jivica » Thu Jun 07, 2018 6:33 am

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

Code: Select all

 
!  Compute interior diffusivity due to wave breaking (Gargett and
!  Holloway.
Patrick,
you have put non-breaking 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

fdaryabor
Posts: 78
Joined: Wed Jan 02, 2008 3:15 pm
Location: University of Copenhagen

Re: Nonbreaking wave-induced mixing in ROMS?

#8 Post by fdaryabor » Fri Jun 08, 2018 11:26 am

Dear Ivica,

Please have a look to "lmd_vmix.F " and the section, regarding to "Sum contributions due to internal wave breaking...", in fact non-breaking 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. :arrow:

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 94 times
Qiao_et_al-2004-Geophysical_Research_Letters.pdf
(1.19 MiB) Downloaded 73 times

Post Reply