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Changeset 6289 for trunk/DOC/TexFiles/Chapters/Chap_DIU.tex – NEMO

Ignore:
Timestamp:
2016-02-05T00:47:05+01:00 (8 years ago)
Author:
gm
Message:

#1673 DOC of the trunk - Update, see associated wiki page for description

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1 edited

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  • trunk/DOC/TexFiles/Chapters/Chap_DIU.tex

    r6140 r6289  
    1313 
    1414Code to produce an estimate of the diurnal warming and cooling of the sea surface skin 
    15 temperature (skin SST) is found in the DIU directory.  The skin 
    16 temperature can be split into three parts: 
     15temperature (skin SST) is found in the DIU directory.   
     16The skin temperature can be split into three parts: 
    1717\begin{itemize} 
    1818\item A foundation SST which is free from diurnal warming. 
     
    2525Models are provided for both the warm layer, diurnal\_bulk.F90, and the cool skin, 
    2626cool\_skin.F90.  Foundation SST is not considered as it can be obtained 
    27 either from the main NEMO model (i.e. from the temperature of the top few model levels) 
    28 or from 
    29 some other source.  It must be noted that both the cool skin and 
    30 warm layer models produce estimates of the change in temperature ($\Delta T_{\rm{cs}}$ 
    31 and $\Delta T_{\rm{wl}}$) and both must 
    32 be added to a foundation SST to obtain the true skin temperature. 
     27either from the main NEMO model ($i.e.$ from the temperature of the top few model levels) 
     28or from some other source.   
     29It must be noted that both the cool skin and warm layer models produce estimates of  
     30the change in temperature ($\Delta T_{\rm{cs}}$ and $\Delta T_{\rm{wl}}$)  
     31and both must be added to a foundation SST to obtain the true skin temperature. 
    3332 
    34 Both the cool skin and warm layer models are controlled through the namelist `namdiu': 
     33Both the cool skin and warm layer models are controlled through the namelist \ngn{namdiu}: 
    3534\namdisplay{namdiu} 
    3635This namelist contains only two variables: 
    3736\begin{description} 
    38 \item[ln\_diurnal] A logical switch for turning on/off both the cool skin and warm layer. 
    39 \item[ln\_diurnal\_only] A logical switch which if .TRUE. will run the diurnal model 
    40 without the other dynamical parts of NEMO.  ln\_diurnal\_only must be 
    41 .FALSE. if ln\_diurnal is .FALSE. 
     37\item[\np{ln\_diurnal}] A logical switch for turning on/off both the cool skin and warm layer. 
     38\item[\np{ln\_diurnal\_only}] A logical switch which if .TRUE. will run the diurnal model 
     39without the other dynamical parts of NEMO.   
     40\np{ln\_diurnal\_only} must be .FALSE. if \np{ln\_diurnal} is .FALSE. 
    4241\end{description} 
    4342 
     
    4645output if they are specified in the iodef.xml file. 
    4746 
    48 Initialisation is through the restart file.  Specifically the code will expect the presence of the 2-D variable ``Dsst'' to initialise the warm layer.  The cool skin model, which is determined purely by the instantaneous fluxes, has no initialisation variable.   
     47Initialisation is through the restart file.  Specifically the code will expect  
     48the presence of the 2-D variable ``Dsst'' to initialise the warm layer.   
     49The cool skin model, which is determined purely by the instantaneous fluxes,  
     50has no initialisation variable.   
    4951 
    5052%=============================================================== 
    51  
    5253\section{Warm Layer model} 
    5354\label{warm_layer_sec} 
    54  
    5555%=============================================================== 
    5656 
     
    8181(\ref{ecmwf1}) is the instantaneous total thermal energy 
    8282flux into 
    83 the diurnal layer, i.e. 
     83the diurnal layer, $i.e.$ 
    8484\begin{equation} 
    8585Q = Q_{\rm{sol}} + Q_{\rm{lw}} + Q_{\rm{h}}\mbox{,} \label{e_flux_eqn} 
     
    105105where $\zeta=\frac{D_T}{L}$.  It is clear that the first derivative of 
    106106(\ref{stab_func_eqn}), and thus of (\ref{ecmwf1}), 
    107 is discontinuous at $\zeta=0$ (i.e. $Q\rightarrow0$ in equation (\ref{ecmwf2})). 
     107is discontinuous at $\zeta=0$ ($i.e.$ $Q\rightarrow0$ in equation (\ref{ecmwf2})). 
    108108 
    109109The two terms on the right hand side of (\ref{ecmwf1}) represent different processes. 
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