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branches/nemo_v3_3_beta/DOC/TexFiles/Chapters/Chap_ZDF.tex
r2282 r2349 339 339 \label{ZDF_gls} 340 340 341 %--------------------------------------------nam gls---------------------------------------------------------342 \namdisplay{nam gls}341 %--------------------------------------------namzdf_gls--------------------------------------------------------- 342 \namdisplay{namzdf_gls} 343 343 %-------------------------------------------------------------------------------------------------------------- 344 344 … … 386 386 The constants $C_1$, $C_2$, $C_3$, ${\sigma_e}$, ${\sigma_{\psi}}$ and the wall function ($Fw$) 387 387 depends of the choice of the turbulence model. Four different turbulent models are pre-defined 388 (Tab.\ref{Tab_GLS}). They are made available through th \np{gls} namelist parameter.388 (Tab.\ref{Tab_GLS}). They are made available through the \np{nn\_clo} namelist parameter. 389 389 390 390 %--------------------------------------------------TABLE-------------------------------------------------- … … 408 408 \hline 409 409 \end{tabular} 410 \caption {Set of predefined GLS parameters, or equivalently predefined turbulence models available with \key{ gls} and controlled by the \np{nn\_clos} namelist parameter.}410 \caption {Set of predefined GLS parameters, or equivalently predefined turbulence models available with \key{zdfgls} and controlled by the \np{nn\_clos} namelist parameter.} 411 411 \end{center} 412 412 \end{table} … … 414 414 415 415 In the Mellor-Yamada model, the negativity of $n$ allows to use a wall function to force 416 the convergence of the mixing length towards $K \,z_b$ ($K$: Kappa and $z_b$: rugosity length)416 the convergence of the mixing length towards $K z_b$ ($K$: Kappa and $z_b$: rugosity length) 417 417 value near physical boundaries (logarithmic boundary layer law). $C_{\mu}$ and $C_{\mu'}$ 418 418 are calculated from stability function proposed by \citet{Galperin_al_JAS88}, or by \citet{Kantha_Clayson_1994} … … 431 431 stably stratified situations, and that its value has to be chosen in accordance 432 432 with the algebraic model for the turbulent ßuxes. The clipping is only activated 433 if \np{ln\_length\_lim}=true, and the $c_{lim}$ is set to the \np{ clim\_galp} value.433 if \np{ln\_length\_lim}=true, and the $c_{lim}$ is set to the \np{rn\_clim\_galp} value. 434 434 435 435 % ------------------------------------------------------------------------------------------------------------- … … 576 576 % Turbulent Closure Scheme 577 577 % ------------------------------------------------------------------------------------------------------------- 578 \subsection{Turbulent Closure Scheme (\key{zdftke} )}578 \subsection{Turbulent Closure Scheme (\key{zdftke} or \key{zdfgls})} 579 579 \label{ZDF_tcs} 580 580 581 The TKE turbulent closure scheme presented in \S\ref{ZDF_tke} and used582 when the \key{zdftke} is defined,in theory solves the problem of statically581 The turbulent closure scheme presented in \S\ref{ZDF_tke} and \S\ref{ZDF_gls} 582 (\key{zdftke} or \key{zdftke} is defined) in theory solves the problem of statically 583 583 unstable density profiles. In such a case, the term corresponding to the 584 584 destruction of turbulent kinetic energy through stratification in \eqref{Eq_zdftke_e} 585 becomes a source term, since $N^2$ is negative. It results in large values of586 $A_T^{vT}$ and $A_T^{vT}$, and also the four neighbouring585 or \eqref{Eq_zdfgls_e} becomes a source term, since $N^2$ is negative. 586 It results in large values of $A_T^{vT}$ and $A_T^{vT}$, and also the four neighbouring 587 587 $A_u^{vm} {and}\;A_v^{vm}$ (up to $1\;m^2s^{-1})$. These large values 588 588 restore the static stability of the water column in a way similar to that of the … … 590 590 in the vicinity of the sea surface (first ocean layer), the eddy coefficients 591 591 computed by the turbulent closure scheme do not usually exceed $10^{-2}m.s^{-1}$, 592 because the mixing length scale is bounded by the distance to the sea surface 593 (see \S\ref{ZDF_tke}).It can thus be useful to combine the enhanced vertical592 because the mixing length scale is bounded by the distance to the sea surface. 593 It can thus be useful to combine the enhanced vertical 594 594 diffusion with the turbulent closure scheme, $i.e.$ setting the \np{ln\_zdfnpc} 595 namelist parameter to true and defining the \key{zdftke}CPP key all together.595 namelist parameter to true and defining the turbulent closure CPP key all together. 596 596 597 597 The KPP turbulent closure scheme already includes enhanced vertical diffusion … … 603 603 % Double Diffusion Mixing 604 604 % ================================================================ 605 \section [Double Diffusion Mixing (\ textit{zdfddm} - \key{zdfddm})]606 {Double Diffusion Mixing (\ mdl{zdfddm} module - \key{zdfddm})}605 \section [Double Diffusion Mixing (\key{zdfddm})] 606 {Double Diffusion Mixing (\key{zdfddm})} 607 607 \label{ZDF_ddm} 608 608 … … 617 617 parameterisation of such phenomena in a global ocean model and show that 618 618 it leads to relatively minor changes in circulation but exerts significant regional 619 influences on temperature and salinity. 619 influences on temperature and salinity. This parameterisation has been 620 introduced in \mdl{zdfddm} module and is controlled by the \key{zdfddm} CPP key. 620 621 621 622 Diapycnal mixing of S and T are described by diapycnal diffusion coefficients … … 625 626 \end{align*} 626 627 where subscript $f$ represents mixing by salt fingering, $d$ by diffusive convection, 627 and $o$ by processes other than double diffusion. The rates of double-diffusive mixing depend on the buoyancy ratio $R_\rho = \alpha \partial_z T / \beta \partial_z S$, 628 and $o$ by processes other than double diffusion. The rates of double-diffusive 629 mixing depend on the buoyancy ratio $R_\rho = \alpha \partial_z T / \beta \partial_z S$, 628 630 where $\alpha$ and $\beta$ are coefficients of thermal expansion and saline 629 631 contraction (see \S\ref{TRA_eos}). To represent mixing of $S$ and $T$ by salt … … 921 923 % Tidal Mixing 922 924 % ================================================================ 923 \section{Tidal Mixing }925 \section{Tidal Mixing (\key{zdftmx})} 924 926 \label{ZDF_tmx} 925 927 … … 994 996 % Indonesian area specific treatment 995 997 % ------------------------------------------------------------------------------------------------------------- 996 \subsection{Indonesian area specific treatment }998 \subsection{Indonesian area specific treatment (\np{ln\_zdftmx\_itf})} 997 999 \label{ZDF_tmx_itf} 998 1000
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