Ignore:
Timestamp:
2018-05-28T17:47:05+02:00 (3 years ago)
Author:
smasson
Message:

trunk: cyclic north-south periodicity and nperio cleaning, see #2093

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1 edited

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  • NEMO/trunk/doc/tex_sub/chap_LBC.tex

    r9407 r9667  
    137137 
    138138At the model domain boundaries several choices are offered: closed, cyclic east-west,  
    139 south symmetric across the equator, a north-fold, and combination closed-north fold  
    140 or cyclic-north-fold. The north-fold boundary condition is associated with the 3-pole ORCA mesh.  
     139cyclic north-south, a north-fold, and combination closed-north fold  
     140or bi-cyclic east-west and north-fold. The north-fold boundary condition is associated with the 3-pole ORCA mesh.  
    141141 
    142142% ------------------------------------------------------------------------------------------------------------- 
    143 %        Closed, cyclic, south symmetric (\np{jperio}\forcode{ = 0..2})  
     143%        Closed, cyclic (\np{jperio}\forcode{ = 0..2})  
    144144% ------------------------------------------------------------------------------------------------------------- 
    145 \subsection{Closed, cyclic, south symmetric (\protect\np{jperio}\forcode{= 0..2})} 
     145\subsection{Closed, cyclic (\protect\np{jperio}\forcode{= [0127]})} 
    146146\label{subsec:LBC_jperio012} 
    147147 
    148 The choice of closed, cyclic or symmetric model domain boundary condition is made  
    149 by setting \np{jperio} to 0, 1 or 2 in namelist \ngn{namcfg}. Each time such a boundary  
     148The choice of closed or cyclic model domain boundary condition is made  
     149by setting \np{jperio} to 0, 1, 2 or 7 in namelist \ngn{namcfg}. Each time such a boundary  
    150150condition is needed, it is set by a call to routine \mdl{lbclnk}. The computation of  
    151151momentum and tracer trends proceeds from $i=2$ to $i=jpi-1$ and from $j=2$ to  
     
    162162and the last column to the value of the second one (\autoref{fig:LBC_jperio}-a).  
    163163Whatever flows out of the eastern (western) end of the basin enters the western  
    164 (eastern) end. Note that there is no option for north-south cyclic or for doubly  
    165 cyclic cases. 
    166  
    167 \item[For symmetric boundary condition across the equator (\np{jperio}\forcode{ = 2})],  
    168 last rows, and first and last columns are set to zero (closed). The row of symmetry  
    169 is chosen to be the $u$- and $T-$points equator line ($j=2$, i.e. at the southern  
    170 end of the domain). For arrays defined at $u-$ or $T-$points, the first row is set  
    171 to the value of the third row while for most of $v$- and $f$-point arrays ($v$, $\zeta$,  
    172 $j\psi$, but \gmcomment{not sure why this is "but"} scalar arrays such as eddy coefficients)  
    173 the first row is set to minus the value of the second row (\autoref{fig:LBC_jperio}-b).  
    174 Note that this boundary condition is not yet available for the case of a massively  
    175 parallel computer (\textbf{key{\_}mpp} defined). 
     164(eastern) end. 
     165 
     166\item[For cyclic north-south boundary (\np{jperio}\forcode{ = 2})], first and last columns are set  
     167to zero (closed) whilst the first row is set to the value of the last-but-one row  
     168and the last row to the value of the second one (\autoref{fig:LBC_jperio}-a).  
     169Whatever flows out of the northern (southern) end of the basin enters the southern   
     170(northern) end. 
     171 
     172\item[Bi-cyclic east-west and north-south boundary (\np{jperio}\forcode{ = 7})] combines cases 1 and 2. 
    176173 
    177174\end{description} 
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