/[MITgcm]/manual/s_examples/held_suarez_cs/inp_data.shap.templ
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revision 1.3 by jmc, Mon Aug 22 20:46:12 2005 UTC revision 1.6 by jmc, Tue Aug 31 18:13:47 2010 UTC
# Line 4  Line 4 
4    
5  This file, reproduced completely below, specifies the parameters  This file, reproduced completely below, specifies the parameters
6  that the model uses for the Shapiro filter package (\cite{Shapiro_70},  that the model uses for the Shapiro filter package (\cite{Shapiro_70},
7  section \ref{sect:shapiro-filter}).  section \ref{sec:shapiro-filter}).
8  The parameters that are significant for this configuration are:  The parameters that are significant for this configuration are:
9    
10  \begin{itemize}  \begin{itemize}
# Line 15  The parameters that are significant for Line 15  The parameters that are significant for
15  \end{verbatim}  \end{verbatim}
16  This line selects the shapiro filter function  This line selects the shapiro filter function
17  to use, here S2 in this experiment  to use, here S2 in this experiment
18  (see section \ref{sect:shapiro-filter}).  (see section \ref{sec:shapiro-filter}).
19    
20  \item Lines PUT_LINE_NB:nShapT= and PUT_LINE_NB:nShapUV=,  \item Lines PUT_LINE_NB:nShapT= and PUT_LINE_NB:nShapUV=,
21  \begin{verbatim}  \begin{verbatim}
22   nShapT=4,   nShapT=0,
23   nShapUV=4,   nShapUV=4,
24  \end{verbatim}  \end{verbatim}
25  Those lines select the order of the shapiro filter  Those lines select the order of the shapiro filter
26  for active tracer ($\theta$ and $q$) and momentum ($u,v$) respectively.  for active tracer ($\theta$ and $q$) and momentum ($u,v$) respectively.
27  This sets the integer parameter $n$ to 4, in the equations of  In this case, no filter is applied to active tracers. Regarding
28  section \ref{sect:shapiro-filter}, which corresponds to a 8th order  the momentum, this sets the integer parameter $n$ to 4, in the equations of
29    section \ref{sec:shapiro-filter}, which corresponds to a 8th order
30  filter.  filter.
31    
32  \item Lines PUT_LINE_NB:nShapTrPhys= and PUT_LINE_NB:nShapUVPhys=,  \item Line PUT_LINE_NB:nShapUVPhys=,
33  \begin{verbatim}  \begin{verbatim}
34   nShapTrPhys=0,   nShapUVPhys=4,
  nShapUVPhys=0,  
35  \end{verbatim}  \end{verbatim}
36  Those lines select the order of the physical space filter  This line selects the order of the physical space filter
37  (filter function S2g, in section \ref{sect:shapiro-filter})  (filter function S2g, in section \ref{sec:shapiro-filter})
38  that applies to $\theta,q$ and to $u,v$ respectively.  that applies to $u,v$.
39  The differences {\it nShapT - nShapTrPhys} and {\it nShapUV - nShapUVPhys}  The difference {\it nShapUV - nShapUVPhys}
40  correspond to the order of the computational filter  corresponds to the order of the computational filter
41  (filter function S2c, in section \ref{sect:shapiro-filter}).  (filter function S2c, in section \ref{sec:shapiro-filter}).
42    
43  \item Lines PUT_LINE_NB:Shap_Trtau= and PUT_LINE_NB:Shap_uvtau=,  \item Lines PUT_LINE_NB:#Shap_Trtau= and PUT_LINE_NB:#Shap_uvtau=,
44  \begin{verbatim}  \begin{verbatim}
45   Shap_Trtau=5400.,  #Shap_Trtau=5400.,
46   Shap_uvtau=1800.,  #Shap_uvtau=1800.,
47  \end{verbatim}  \end{verbatim}
48  Thoses lines set the time scale of the filter (in seconds),  Those commented lines would have set the time scale of the filter (in seconds),
49  for $\theta$ and $q$ and for $u$ and $v$ respectively,  for $\theta$ and $q$ and for $u$ and $v$ respectively,
50  to 5400 s (90 min) and 1800 s (30 min) respectively.  to 5400 s (90 min) and 1800 s (30 min) respectively.
51  Note that a shorter time scale means a stronger filter, and  Without explicitly setting those timescales, the default is used
52  that the time scale cannot be smaller than the time-step $\Delta t$  which corresponds to the model time-step.
53  of the model.  %Note that a shorter time scale means a stronger filter, and
54    %that the time scale cannot be smaller than the time-step $\Delta t$
55    %of the model.
56    
57  \end{itemize}  \end{itemize}
58    
59  The entire file {\it input/data.shap} is reproduced here below:  The entire file {\it input/data.shap} is reproduced here below:
60    
61  \begin{small}  \begin{small}
62  \input{part3/case_studies/held_suarez_cs/input/data.shap}  \input{s_examples/held_suarez_cs/input/data.shap}
63  \end{small}  \end{small}
64    
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