Changeset 11683
- Timestamp:
- 2019-10-11T00:16:09+02:00 (4 years ago)
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NEMO/trunk/doc/latex/NEMO/subfiles/chap_ZDF.tex
r11682 r11683 550 550 Most of the namelist options refer to how to specify the Stokes 551 551 surface drift and penetration depth. There are three options: 552 \begin{ enumerate}553 \item \np{nn\_osm\_wave=0} .Default value in \texttt{namelist\_ref}. In this case the Stokes drift is552 \begin{description} 553 \item \np{nn\_osm\_wave=0} Default value in \texttt{namelist\_ref}. In this case the Stokes drift is 554 554 assumed to be parallel to the surface wind stress, with 555 555 magnitude consistent with a constant turbulent Langmuir number … … 560 560 of \SI{5 m}. 561 561 562 \item \np{nn\_osm\_wave=1} .In this case the Stokes drift is562 \item \np{nn\_osm\_wave=1} In this case the Stokes drift is 563 563 assumed to be parallel to the surface wind stress, with 564 564 magnitude as in the classical Pierson-Moskowitz wind-sea … … 567 567 depth, following the approach set out in Breivik(XXxx) 568 568 569 \item \np{nn\_osm\_wave=2} .In this case the Stokes drift is569 \item \np{nn\_osm\_wave=2} In this case the Stokes drift is 570 570 taken from ECMWF wave model output, though only the component parallel 571 571 to the wind stress is retained. Significant wave height and … … 573 573 depth, following the approach set out in Breivik(XXxx). 574 574 575 \end{ enumerate}575 \end{description} 576 576 577 577 Others refer to the treatment of diffusion and viscosity beneath 578 578 the surface boundary layer: 579 \begin{ enumerate}580 \item \np{ln\_kpprimix} . Default is \np{.true.}. Switches on KPP-style Ri#-dependent579 \begin{description} 580 \item \np{ln\_kpprimix} Default is \np{.true.}. Switches on KPP-style Ri \#-dependent 581 581 mixing below the surface boundary layer. If this is set 582 582 \np{.true.} the following variable settings are honoured: 583 \item \np{rn\_riinfty} . Critical value of local Ri# below which583 \item \np{rn\_riinfty} Critical value of local Ri \# below which 584 584 shear instability increases vertical mixing from background value. 585 \item \np{rn\_difri}. Critical value of local Ri # below which 586 shear instability increases vertical mixing from background value. 587 \end{enumerate} 588 and the last to diagnostic outputs: 589 \begin{list} 590 \item \np{ln\_dia\_osm}. Default is \np{.false.}; allows XIOS output of OSMOSIS internal fields. 591 \end{list} 592 593 594 Obsolete namelist parameters include: 595 \begin{enumerate} 596 \item \np{ln\_use\_osm\_la}. With \np{nn\_osm\_wave=0}, 585 \item \np{rn\_difri} Maximum value of Ri \#-dependent mixing at $\mathrm{Ri}=0$. 586 \item \np{ln\_convmix} If \texttt{.true.} then, where water column is unstable, specify 587 diffusivity equal to \np{rn\_dif\_conv} (default value is 1 ms$^{-2}$). 588 \end{description} 589 Diagnostic output is controlled by: 590 \begin{description} 591 \item \np{ln\_dia\_osm} Default is \np{.false.}; allows XIOS output of OSMOSIS internal fields. 592 \end{description} 593 Obsolete namelist parameters include: 594 \begin{description} 595 \item \np{ln\_use\_osm\_la} With \np{nn\_osm\_wave=0}, 597 596 \np{rn\_osm\_dstokes} is always used to specify the Stokes 598 597 penetration depth. 599 600 \item \np{nn\_ave}. Choice of averaging method for KPP-style Ri# 598 \item \np{nn\_ave} Choice of averaging method for KPP-style Ri# 601 599 mixing. Not taken account of. 602 603 \item \np{rn\_osm\_hbl0} 604 \item \np{ln\_dia\_osm} 605 \end{enumerate} 600 \item \np{rn\_osm\_hbl0} Depth of initial boundary layer is now set 601 by a desnity criterion similar to that used in 602 \end{description} 606 603 607 604 \subsubsection{Summary}
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