Update chap_DYN.tex

latex/NEMO/subfiles/chap_DYN.tex

@@ -802,8 +802,8 @@ The pressure gradient due to ocean load is computed using the expression \autore
 
 Options are defined through the \nam{dyn_spg}{dyn\_spg} namelist variables.
 The surface pressure gradient term is related to the representation of the free surface (\autoref{sec:MB_hor_pg}).
-The main distinction is between the fixed volume case (linear free surface, \ie\ \np[=.true.]{ln_linssh}{ln\_linssh}) and
-the variable volume case (nonlinear free surface, \np[=.false.]{ln_linssh}{ln\_linssh}).
+The main distinction is between the fixed volume case (linear free surface, \ie\ with the inclusion of \key{linssh}) and
+the variable volume case (nonlinear free surface, \key{qco}).
 In the linear free surface case (\autoref{subsec:MB_free_surface})
 the vertical scale factors $e_{3}$ are fixed in time,
 while they are time-dependent in the nonlinear case (\autoref{subsec:MB_free_surface}).
@@ -832,6 +832,8 @@ is thus simply given by :
   \right.
 \end{equation}
 
+Note that this option is not yet compatible with RK3 time-stepping.
+
 %% =================================================================================================
 \subsection[Split-explicit free surface (\forcode{ln_dynspg_ts})]{Split-explicit free surface (\protect\np{ln_dynspg_ts}{ln\_dynspg\_ts})}
 \label{subsec:DYN_spg_ts}