Changeset 11682 for NEMO/trunk/doc/latex/NEMO/subfiles/chap_ZDF.tex

Timestamp:

2019-10-11T00:16:02+02:00 (4 years ago)

Author:

agn

Message:

Sunday

File:

• NEMO/trunk/doc/latex/NEMO/subfiles/chap_ZDF.tex (modified) (1 diff)

NEMO/trunk/doc/latex/NEMO/subfiles/chap_ZDF.tex

@@ -551 +551 @@
 surface drift and penetration depth. There are three options:
 \begin{enumerate}
-  \item \texttt{nn_osm_wave=0}. In this case the Stokes drift is
+  \item \np{nn\_osm\_wave=0}. Default value in \texttt{namelist\_ref}. In this case the Stokes drift is
       assumed to be parallel to the surface wind stress, with
       magnitude consistent with a constant turbulent Langmuir number
-    $\mathrm{La}_t= \texttt{rn_m_la}$ i.e.\
-    $u_[s0}=\tau/(\texttt{rn_m_la}^2\rho_0)$.
-  \item \texttt{nn_osm_wave=1}. In this case the Stokes drift is
+    $\mathrm{La}_t=$ \np{rn\_m\_la} i.e.\
+    $u_{s0}=\tau/(\np{rn\_m\_la}^2\rho_0)$.  Default value of
+    \np{rn\_m\_la} is 0.3. The Stokes penetration
+      depth $\delta = $ \np{rn\_osm\_dstokes}; this has default value
+      of \SI{5 m}.
+ 
+  \item \np{nn\_osm\_wave=1}. In this case the Stokes drift is
       assumed to be parallel to the surface wind stress, with
       magnitude as in the classical Pierson-Moskowitz wind-sea
-      spectrum.
-    \item \texttt{nn_osm_wave=2}. In this case the Stokes drift is
-      taken from  ECMWF wave model output. Significant wave height and
-      wave-mean period are used to calciulate the Stokes penetration
-      depth, followingh the approach set out in Breivik(XXxx)
-
+      spectrum.  Significant wave height and
+      wave-mean period taken from this spectrum are used to calculate the Stokes penetration
+      depth, following the approach set out in Breivik(XXxx)
+ 
+    \item \np{nn\_osm\_wave=2}. In this case the Stokes drift is
+      taken from  ECMWF wave model output, though only the component parallel
+      to the wind stress is retained. Significant wave height and
+      wave-mean period from ECMWF wave model output are used to calculate the Stokes penetration
+      depth, following the approach set out in Breivik(XXxx).
+
+    \end{enumerate}
+
+    Others refer to the treatment of diffusion and viscosity beneath
+    the surface boundary layer:
+\begin{enumerate}
+   \item \np{ln\_kpprimix}.  Default is \np{.true.}. Switches on KPP-style Ri #-dependent
+     mixing below the surface boundary layer. If this is set
+     \np{.true.}  the following variable settings are honoured:
+    \item \np{rn\_riinfty}. Critical value of local Ri # below which
+      shear instability increases vertical mixing from background value.
+    \item \np{rn\_difri}. Critical value of local Ri # below which
+      shear instability increases vertical mixing from background value.
   \end{enumerate}
+  and the last to diagnostic outputs:
+  \begin{list}
+    \item \np{ln\_dia\_osm}. Default is \np{.false.}; allows XIOS output of OSMOSIS internal fields.
+  \end{list}
+
+    
+    Obsolete namelist parameters include:
+  \begin{enumerate}
+   \item \np{ln\_use\_osm\_la}. With \np{nn\_osm\_wave=0},
+      \np{rn\_osm\_dstokes} is always used to specify the Stokes
+      penetration depth.
+
+    \item \np{nn\_ave}. Choice of averaging method for KPP-style Ri#
+      mixing. Not taken account of.
+ 
+     \item \np{rn\_osm\_hbl0}
+     \item \np{ln\_dia\_osm}
+      \end{enumerate}
+
 \subsubsection{Summary}
 Much of the time the turbulent motions in the ocean surface boundary