Changeset 11681

Timestamp:

2019-10-11T00:15:54+02:00 (4 years ago)

Author:

agn

Message:

Wednsday's changes

File:

• NEMO/trunk/doc/latex/NEMO/subfiles/chap_ZDF.tex (modified) (2 diffs)

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

@@ -546 +546 @@
 \end{listing}
 
+%--------------------------------------------------------------------------------------------------------------
+\paragraph{Namelist choices}
+Most of the namelist options refer to how to specify the Stokes
+surface drift and penetration depth. There are three options:
+\begin{enumerate}
+  \item \texttt{nn_osm_wave=0}. 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
+      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)
+
+  \end{enumerate}
+\subsubsection{Summary}
 Much of the time the turbulent motions in the ocean surface boundary
 layer (OSBL) are not given by
@@ -603 +624 @@
   \nu_{\ast}= \left\{ u_*^3 \left[1-\exp(-1.5 \mathrm{La}_t^2})\right]+w_{*L}^3\right\}^{1/3}.
 \end{equation}
-For the unstable boundary layer this is merged with the standard convective velocity scale $w_{*C}=\left(\overline{w^\prime b^\prime}_0 \,h_\mathrm{ml}\right)^{1/3}$, where $\overline{w^\prime b^\prime}_0$ is the upwards surface buoyancy flux to give:
+For the unstable boundary layer this is merged with the standard convective velocity scale $w_{*C}=\left(\overline{w^\prime b^\prime}_0 \,h_\mathrm{ml}\right)^{1/3}$, where $\overline{w^\prime b^\prime}_0$ is the upwards surface buoyancy flux, to give:
 \begin{equation}\label{eq:vel-scale-unstable}
 \omega_* = \left(\nu_*^3 + 0.5 w_{*C}^3\right)^{1/3}.