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revision 1.8 by molod, Thu Jul 14 19:18:02 2005 UTC revision 1.9 by molod, Mon Jul 18 20:45:27 2005 UTC
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1  \section{Fizhi: High-end Atmospheric Physics}  \subsection{Fizhi: High-end Atmospheric Physics}
2  \label{sec:pkg:fizhi}  \label{sec:pkg:fizhi}
3  \begin{rawhtml}  \begin{rawhtml}
4  <!-- CMIREDIR:package_fizhi: -->  <!-- CMIREDIR:package_fizhi: -->
5  \end{rawhtml}  \end{rawhtml}
6  \input{texinputs/epsf.tex}  \input{texinputs/epsf.tex}
7    
8  \subsection{Introduction}  \subsubsection{Introduction}
9  The fizhi (high-end atmospheric physics) package includes a collection of state-of-the-art  The fizhi (high-end atmospheric physics) package includes a collection of state-of-the-art
10  physical parameterizations for atmospheric radiation, cumulus convection, atmospheric  physical parameterizations for atmospheric radiation, cumulus convection, atmospheric
11  boundary layer turbulence, and land surface processes.  boundary layer turbulence, and land surface processes.
# Line 13  boundary layer turbulence, and land surf Line 13  boundary layer turbulence, and land surf
13  % *************************************************************************  % *************************************************************************
14  % *************************************************************************  % *************************************************************************
15    
16  \subsection{Equations}  \subsubsection{Equations}
17    
18  \subsubsection{Moist Convective Processes}  Moist Convective Processes:
19    
20  \paragraph{Sub-grid and Large-scale Convection}  \paragraph{Sub-grid and Large-scale Convection}
21  \label{sec:fizhi:mc}  \label{sec:fizhi:mc}
# Line 186  F_{CLD} = \max \left[ F_{RAS},F_{LS} \ri Line 186  F_{CLD} = \max \left[ F_{RAS},F_{LS} \ri
186  Finally, cloud fractions are time-averaged between calls to the radiation packages.  Finally, cloud fractions are time-averaged between calls to the radiation packages.
187    
188    
189  \subsubsection{Radiation}  Radiation:
190    
191  The parameterization of radiative heating in the fizhi package includes effects  The parameterization of radiative heating in the fizhi package includes effects
192  from both shortwave and longwave processes.  from both shortwave and longwave processes.
# Line 428  The cloud fraction values are time-avera Line 428  The cloud fraction values are time-avera
428  hours).  Therefore, in a time-averaged sense, both convective and large-scale  hours).  Therefore, in a time-averaged sense, both convective and large-scale
429  cloudiness can exist in a given grid-box.    cloudiness can exist in a given grid-box.  
430    
431  \subsubsection{Turbulence}  Turbulence:
432    
433  Turbulence is parameterized in the fizhi package to account for its contribution to the  Turbulence is parameterized in the fizhi package to account for its contribution to the
434  vertical exchange of heat, moisture, and momentum.    vertical exchange of heat, moisture, and momentum.  
435  The turbulence scheme is invoked every 30 minutes, and employs a backward-implicit iterative  The turbulence scheme is invoked every 30 minutes, and employs a backward-implicit iterative
# Line 672  by $2 \pi$ $radians/ Line 673  by $2 \pi$ $radians/
673  day$, and the expression for $C_s$, the heat capacity per unit volume at the surface,  day$, and the expression for $C_s$, the heat capacity per unit volume at the surface,
674  is a function of the ground wetness, $W$.  is a function of the ground wetness, $W$.
675    
676  \subsubsection{Land Surface Processes}  Land Surface Processes:
677    
678  \paragraph{Surface Type}  \paragraph{Surface Type}
679  The fizhi package surface Types are designated using the Koster-Suarez (1992) mosaic  The fizhi package surface Types are designated using the Koster-Suarez (1992) mosaic
# Line 750  sun), the greenness fraction, the vegeta Line 751  sun), the greenness fraction, the vegeta
751  Modifications are made to account for the presence of snow, and its depth relative  Modifications are made to account for the presence of snow, and its depth relative
752  to the height of the vegetation elements.  to the height of the vegetation elements.
753    
754  \subsubsection{Gravity Wave Drag}  Gravity Wave Drag:
755    
756  The fizhi package employs the gravity wave drag scheme of Zhou et al. (1996).  The fizhi package employs the gravity wave drag scheme of Zhou et al. (1996).
757  This scheme is a modified version of Vernekar et al. (1992),  This scheme is a modified version of Vernekar et al. (1992),
758  which was based on Alpert et al. (1988) and Helfand et al. (1987).    which was based on Alpert et al. (1988) and Helfand et al. (1987).  
# Line 784  of mountain torque (through a redistribu Line 786  of mountain torque (through a redistribu
786  convergence (through a reduction in the flux of westerly momentum by transient flow eddies).    convergence (through a reduction in the flux of westerly momentum by transient flow eddies).  
787    
788    
789  \subsubsection{Boundary Conditions and other Input Data}  Boundary Conditions and other Input Data:
790    
791  Required fields which are not explicitly predicted or diagnosed during model execution must  Required fields which are not explicitly predicted or diagnosed during model execution must
792  either be prescribed internally or obtained from external data sets.  In the fizhi package these  either be prescribed internally or obtained from external data sets.  In the fizhi package these
# Line 893  the model's moisture data is used.  Abov Line 895  the model's moisture data is used.  Abov
895  a linear interpolation (in pressure) is performed using the data from SAGE and the GCM.  a linear interpolation (in pressure) is performed using the data from SAGE and the GCM.
896    
897    
898  \subsection{Fizhi Diagnostics}  \subsubsection{Fizhi Diagnostics}
899    
900  \subsubsection{Fizhi Diagnostic Menu}  Fizhi Diagnostic Menu:
901  \label{sec:fizhi-diagnostics:menu}  \label{sec:fizhi-diagnostics:menu}
902    
903  \begin{tabular}{llll}  \begin{tabular}{llll}
# Line 1424  a linear interpolation (in pressure) is Line 1426  a linear interpolation (in pressure) is
1426    
1427  \newpage  \newpage
1428    
1429  \subsubsection{Fizhi Diagnostic Description}  Fizhi Diagnostic Description:
1430    
1431  In this section we list and describe the diagnostic quantities available within the  In this section we list and describe the diagnostic quantities available within the
1432  GCM.  The diagnostics are listed in the order that they appear in the  GCM.  The diagnostics are listed in the order that they appear in the
# Line 3025  q^{n+1} = (\pi q)^{n+1} / \pi^{n+1} Line 3027  q^{n+1} = (\pi q)^{n+1} / \pi^{n+1}
3027  \]  \]
3028    
3029    
3030  \subsection{Key subroutines, parameters and files}  \subsubsection{Key subroutines, parameters and files}
3031    
3032  \subsection{Dos and donts}  \subsubsection{Dos and donts}
3033    
3034  \subsection{Fizhi Reference}  \subsubsection{Fizhi Reference}
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