--- manual/s_getstarted/text/getting_started.tex 2006/04/20 22:09:08 1.35 +++ manual/s_getstarted/text/getting_started.tex 2010/01/22 00:38:16 1.41 @@ -1,19 +1,17 @@ -% $Header: /home/ubuntu/mnt/e9_copy/manual/s_getstarted/text/getting_started.tex,v 1.35 2006/04/20 22:09:08 molod Exp $ +% $Header: /home/ubuntu/mnt/e9_copy/manual/s_getstarted/text/getting_started.tex,v 1.41 2010/01/22 00:38:16 jmc Exp $ % $Name: $ %\section{Getting started} -In this section, we describe how to use the model. In the first -section, we provide enough information to help you get started with -the model. We believe the best way to familiarize yourself with the +We believe the best way to familiarize yourself with the model is to run the case study examples provided with the base version. Information on how to obtain, compile, and run the code is -found there as well as a brief description of the model structure -directory and the case study examples. The latter and the code -structure are described more fully in chapters -\ref{chap:discretization} and \ref{chap:sarch}, respectively. Here, in -this section, we provide information on how to customize the code when -you are ready to try implementing the configuration you have in mind. +found here as well as a brief description of the model structure +directory and the case study examples. Information is also provided +here on how to customize the code when you are ready to try implementing +the configuration you have in mind. The code and algorithm +are described more fully in chapters \ref{chap:discretization} and +\ref{chap:sarch}. \section{Where to find information} \label{sect:whereToFindInfo} @@ -21,18 +19,7 @@ \end{rawhtml} -A web site is maintained for release 2 (``Pelican'') of MITgcm: -\begin{rawhtml} \end{rawhtml} -\begin{verbatim} -http://mitgcm.org/pelican -\end{verbatim} -\begin{rawhtml} \end{rawhtml} -Here you will find an on-line version of this document, a -``browsable'' copy of the code and a searchable database of the model -and site, as well as links for downloading the model and -documentation, to data-sources, and other related sites. - -There is also a web-archived support mailing list for the model that +There is a web-archived support mailing list for the model that you can email at \texttt{MITgcm-support@mitgcm.org} or browse at: \begin{rawhtml} \end{rawhtml} \begin{verbatim} @@ -40,16 +27,6 @@ http://mitgcm.org/pipermail/mitgcm-support/ \end{verbatim} \begin{rawhtml} \end{rawhtml} -Essentially all of the MITgcm web pages can be searched using a -popular web crawler such as Google or through our own search facility: -\begin{rawhtml} \end{rawhtml} -\begin{verbatim} -http://mitgcm.org/htdig/ -\end{verbatim} -\begin{rawhtml} \end{rawhtml} -%%% http://www.google.com/search?q=hydrostatic+site%3Amitgcm.org - - \section{Obtaining the code} \label{sect:obtainingCode} @@ -125,7 +102,8 @@ code and CVS. It also contains a web interface to our CVS archive so that one may easily view the state of files, revisions, and other development milestones: -\begin{rawhtml} \end{rawhtml} +%\begin{rawhtml} \end{rawhtml} +\begin{rawhtml} \end{rawhtml} \begin{verbatim} http://mitgcm.org/source_code.html \end{verbatim} @@ -162,7 +140,7 @@ the files in \texttt{CVS}! You can also use CVS to download code updates. More extensive information on using CVS for maintaining MITgcm code can be found -\begin{rawhtml} \end{rawhtml} +\begin{rawhtml} \end{rawhtml} here \begin{rawhtml} \end{rawhtml} . @@ -175,27 +153,6 @@ % mv MITgcm MITgcm_verif_basic \end{verbatim} - -\subsection{Method 2 - Tar file download} -\label{sect:conventionalDownload} - -If you do not have CVS on your system, you can download the model as a -tar file from the web site at: -\begin{rawhtml} \end{rawhtml} -\begin{verbatim} -http://mitgcm.org/download/ -\end{verbatim} -\begin{rawhtml} \end{rawhtml} -The tar file still contains CVS information which we urge you not to -delete; even if you do not use CVS yourself the information can help -us if you should need to send us your copy of the code. If a recent -tar file does not exist, then please contact the developers through -the -\begin{rawhtml} \end{rawhtml} -MITgcm-support@mitgcm.org -\begin{rawhtml} \end{rawhtml} -mailing list. - \subsubsection{Upgrading from an earlier version} If you already have an earlier version of the code you can ``upgrade'' @@ -262,6 +219,26 @@ also means we can't tell what version of the code you are working with. So please be sure you understand what you're doing. +\subsection{Method 2 - Tar file download} +\label{sect:conventionalDownload} + +If you do not have CVS on your system, you can download the model as a +tar file from the web site at: +\begin{rawhtml} \end{rawhtml} +\begin{verbatim} +http://mitgcm.org/download/ +\end{verbatim} +\begin{rawhtml} \end{rawhtml} +The tar file still contains CVS information which we urge you not to +delete; even if you do not use CVS yourself the information can help +us if you should need to send us your copy of the code. If a recent +tar file does not exist, then please contact the developers through +the +\begin{rawhtml} \end{rawhtml} +MITgcm-support@mitgcm.org +\begin{rawhtml} \end{rawhtml} +mailing list. + \section{Model and directory structure} \begin{rawhtml} @@ -286,23 +263,12 @@ \begin{itemize} -\item \texttt{bin}: this directory is initially empty. It is the - default directory in which to compile the code. - -\item \texttt{diags}: contains the code relative to time-averaged - diagnostics. It is subdivided into two subdirectories \texttt{inc} - and \texttt{src} that contain include files (\texttt{*.h} files) and - Fortran subroutines (\texttt{*.F} files), respectively. - \item \texttt{doc}: contains brief documentation notes. \item \texttt{eesupp}: contains the execution environment source code. Also subdivided into two subdirectories \texttt{inc} and \texttt{src}. -\item \texttt{exe}: this directory is initially empty. It is the - default directory in which to execute the code. - \item \texttt{model}: this directory contains the main source code. Also subdivided into two subdirectories \texttt{inc} and \texttt{src}. @@ -311,14 +277,17 @@ package corresponds to a subdirectory. For example, \texttt{gmredi} contains the code related to the Gent-McWilliams/Redi scheme, \texttt{aim} the code relative to the atmospheric intermediate - physics. The packages are described in detail in section 3. + physics. The packages are described in detail in chapter \ref{chap.packagesI}. \item \texttt{tools}: this directory contains various useful tools. For example, \texttt{genmake2} is a script written in csh (C-shell) that should be used to generate your makefile. The directory \texttt{adjoint} contains the makefile specific to the Tangent linear and Adjoint Compiler (TAMC) that generates the adjoint code. - The latter is described in details in part V. + The latter is described in detail in part \ref{chap.ecco}. + This directory also contains the subdirectory build\_options, which + contains the `optfiles' with the compiler options for the different + compilers and machines that can run MITgcm. \item \texttt{utils}: this directory contains various utilities. The subdirectory \texttt{knudsen2} contains code and a makefile that @@ -327,184 +296,21 @@ \texttt{matlab} subdirectory contains matlab scripts for reading model output directly into matlab. \texttt{scripts} contains C-shell post-processing scripts for joining processor-based and tiled-based - model output. + model output. The subdirectory exch2 contains the code needed for + the exch2 package to work with different combinations of domain + decompositions. \item \texttt{verification}: this directory contains the model examples. See section \ref{sect:modelExamples}. -\end{itemize} - -\section[MITgcm Example Experiments]{Example experiments} -\label{sect:modelExamples} -\begin{rawhtml} - -\end{rawhtml} - -%% a set of twenty-four pre-configured numerical experiments - -The full MITgcm distribution comes with more than a dozen -pre-configured numerical experiments. Some of these example -experiments are tests of individual parts of the model code, but many -are fully fledged numerical simulations. A few of the examples are -used for tutorial documentation in sections \ref{sect:eg-baro} - -\ref{sect:eg-global}. The other examples follow the same general -structure as the tutorial examples. However, they only include brief -instructions in a text file called {\it README}. The examples are -located in subdirectories under the directory \texttt{verification}. -Each example is briefly described below. - -\subsection{Full list of model examples} - -\begin{enumerate} - -\item \texttt{exp0} - single layer, ocean double gyre (barotropic with - free-surface). This experiment is described in detail in section - \ref{sect:eg-baro}. - -\item \texttt{exp1} - Four layer, ocean double gyre. This experiment - is described in detail in section \ref{sect:eg-baroc}. - -\item \texttt{exp2} - 4x4 degree global ocean simulation with steady - climatological forcing. This experiment is described in detail in - section \ref{sect:eg-global}. - -\item \texttt{exp4} - Flow over a Gaussian bump in open-water or - channel with open boundaries. - -\item \texttt{exp5} - Inhomogenously forced ocean convection in a - doubly periodic box. - -\item \texttt{front\_relax} - Relaxation of an ocean thermal front (test for -Gent/McWilliams scheme). 2D (Y-Z). - -\item \texttt{internal wave} - Ocean internal wave forced by open - boundary conditions. - -\item \texttt{natl\_box} - Eastern subtropical North Atlantic with KPP - scheme; 1 month integration - -\item \texttt{hs94.1x64x5} - Zonal averaged atmosphere using Held and - Suarez '94 forcing. - -\item \texttt{hs94.128x64x5} - 3D atmosphere dynamics using Held and - Suarez '94 forcing. - -\item \texttt{hs94.cs-32x32x5} - 3D atmosphere dynamics using Held and - Suarez '94 forcing on the cubed sphere. - -\item \texttt{aim.5l\_zon-ave} - Intermediate Atmospheric physics. - Global Zonal Mean configuration, 1x64x5 resolution. - -\item \texttt{aim.5l\_XZ\_Equatorial\_Slice} - Intermediate - Atmospheric physics, equatorial Slice configuration. 2D (X-Z). - -\item \texttt{aim.5l\_Equatorial\_Channel} - Intermediate Atmospheric - physics. 3D Equatorial Channel configuration. - -\item \texttt{aim.5l\_LatLon} - Intermediate Atmospheric physics. - Global configuration, on latitude longitude grid with 128x64x5 grid - points ($2.8^\circ$ resolution). - -\item \texttt{adjustment.128x64x1} Barotropic adjustment problem on - latitude longitude grid with 128x64 grid points ($2.8^\circ$ resolution). - -\item \texttt{adjustment.cs-32x32x1} Barotropic adjustment problem on - cube sphere grid with 32x32 points per face (roughly $2.8^\circ$ - resolution). - -\item \texttt{advect\_cs} Two-dimensional passive advection test on - cube sphere grid. - -\item \texttt{advect\_xy} Two-dimensional (horizontal plane) passive - advection test on Cartesian grid. - -\item \texttt{advect\_yz} Two-dimensional (vertical plane) passive - advection test on Cartesian grid. - -\item \texttt{carbon} Simple passive tracer experiment. Includes - derivative calculation. Described in detail in section - \ref{sect:eg-carbon-ad}. - -\item \texttt{flt\_example} Example of using float package. - -\item \texttt{global\_ocean.90x40x15} Global circulation with GM, flux - boundary conditions and poles. - -\item \texttt{global\_ocean\_pressure} Global circulation in pressure - coordinate (non-Boussinesq ocean model). Described in detail in - section \ref{sect:eg-globalpressure}. - -\item \texttt{solid-body.cs-32x32x1} Solid body rotation test for cube - sphere grid. - -\end{enumerate} - -\subsection{Directory structure of model examples} - -Each example directory has the following subdirectories: - -\begin{itemize} -\item \texttt{code}: contains the code particular to the example. At a - minimum, this directory includes the following files: - - \begin{itemize} - \item \texttt{code/packages.conf}: declares the list of packages or - package groups to be used. If not included, the default version - is located in \texttt{pkg/pkg\_default}. Package groups are - simply convenient collections of commonly used packages which are - defined in \texttt{pkg/pkg\_default}. Some packages may require - other packages or may require their absence (that is, they are - incompatible) and these package dependencies are listed in - \texttt{pkg/pkg\_depend}. - - \item \texttt{code/CPP\_EEOPTIONS.h}: declares CPP keys relative to - the ``execution environment'' part of the code. The default - version is located in \texttt{eesupp/inc}. - - \item \texttt{code/CPP\_OPTIONS.h}: declares CPP keys relative to - the ``numerical model'' part of the code. The default version is - located in \texttt{model/inc}. - - \item \texttt{code/SIZE.h}: declares size of underlying - computational grid. The default version is located in - \texttt{model/inc}. - \end{itemize} - - In addition, other include files and subroutines might be present in - \texttt{code} depending on the particular experiment. See Section 2 - for more details. - -\item \texttt{input}: contains the input data files required to run - the example. At a minimum, the \texttt{input} directory contains the - following files: - - \begin{itemize} - \item \texttt{input/data}: this file, written as a namelist, - specifies the main parameters for the experiment. +\item \texttt{jobs}: contains sample job scripts for running MITgcm. - \item \texttt{input/data.pkg}: contains parameters relative to the - packages used in the experiment. +\item \texttt{lsopt}: Line search code used for optimization. - \item \texttt{input/eedata}: this file contains ``execution - environment'' data. At present, this consists of a specification - of the number of threads to use in $X$ and $Y$ under multithreaded - execution. - \end{itemize} +\item \texttt{optim}: Interface between MITgcm and line search code. - In addition, you will also find in this directory the forcing and - topography files as well as the files describing the initial state - of the experiment. This varies from experiment to experiment. See - section 2 for more details. - -\item \texttt{results}: this directory contains the output file - \texttt{output.txt} produced by the simulation example. This file is - useful for comparison with your own output when you run the - experiment. \end{itemize} -Once you have chosen the example you want to run, you are ready to -compile the code. - \section[Building MITgcm]{Building the code} \label{sect:buildingCode} \begin{rawhtml} @@ -910,7 +716,7 @@ libraries and put them into an options file as described in Section \ref{sect:genmake}. One can start with one of the examples in: \begin{rawhtml} + href="http://mitgcm.org/viewvc/MITgcm/MITgcm/tools/build_options/"> \end{rawhtml} \begin{center} \texttt{MITgcm/tools/build\_options/} @@ -961,14 +767,21 @@ library and a job scheduling and queueing system such as PBS, LoadLeveller, Condor, or any of a number of similar tools. A few example scripts (those used for our \begin{rawhtml} \end{rawhtml}regular + href="http://mitgcm.org/public/testing.html"> \end{rawhtml}regular verification runs\begin{rawhtml} \end{rawhtml}) are available at: \begin{rawhtml} + href="http://mitgcm.org/viewvc/MITgcm/MITgcm/tools/example_scripts/"> \end{rawhtml} {\footnotesize \tt - http://mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm\_contrib/test\_scripts/ } + http://mitgcm.org/viewvc/MITgcm/MITgcm/tools/example\_scripts/ } + \begin{rawhtml} \end{rawhtml} + or at: + \begin{rawhtml} + \end{rawhtml} + {\footnotesize \tt + http://mitgcm.org/viewvc/MITgcm/MITgcm\_contrib/test\_scripts/ } \begin{rawhtml} \end{rawhtml} \end{enumerate} @@ -1087,47 +900,11 @@ used to restart the model but are overwritten every other time they are output to save disk space during long integrations. - - \subsubsection{MNC output files} Unlike the \texttt{mdsio} output, the \texttt{mnc}--generated output is usually (though not necessarily) placed within a subdirectory with -a name such as \texttt{mnc\_test\_\${DATE}\_\${SEQ}}. The files -within this subdirectory are all in the ``self-describing'' netCDF -format and can thus be browsed and/or plotted using tools such as: -\begin{itemize} -\item \texttt{ncdump} is a utility which is typically included - with every netCDF install: - \begin{rawhtml} \end{rawhtml} -\begin{verbatim} -http://www.unidata.ucar.edu/packages/netcdf/ -\end{verbatim} - \begin{rawhtml} \end{rawhtml} and it converts the netCDF - binaries into formatted ASCII text files. - -\item \texttt{ncview} utility is a very convenient and quick way - to plot netCDF data and it runs on most OSes: - \begin{rawhtml} \end{rawhtml} -\begin{verbatim} -http://meteora.ucsd.edu/~pierce/ncview_home_page.html -\end{verbatim} - \begin{rawhtml} \end{rawhtml} - -\item MatLAB(c) and other common post-processing environments provide - various netCDF interfaces including: - \begin{rawhtml} \end{rawhtml} -\begin{verbatim} -http://mexcdf.sourceforge.net/ -\end{verbatim} - \begin{rawhtml} \end{rawhtml} - \begin{rawhtml} \end{rawhtml} -\begin{verbatim} -http://woodshole.er.usgs.gov/staffpages/cdenham/public_html/MexCDF/nc4ml5.html -\end{verbatim} - \begin{rawhtml} \end{rawhtml} -\end{itemize} - +a name such as \texttt{mnc\_test\_\${DATE}\_\${SEQ}}. \subsection{Looking at the output} @@ -1163,3 +940,37 @@ Similar scripts for netCDF output (\texttt{rdmnc.m}) are available and they are described in Section \ref{sec:pkg:mnc}. +The MNC output files are all in the ``self-describing'' netCDF +format and can thus be browsed and/or plotted using tools such as: +\begin{itemize} +\item \texttt{ncdump} is a utility which is typically included + with every netCDF install: + \begin{rawhtml} \end{rawhtml} +\begin{verbatim} +http://www.unidata.ucar.edu/packages/netcdf/ +\end{verbatim} + \begin{rawhtml} \end{rawhtml} and it converts the netCDF + binaries into formatted ASCII text files. + +\item \texttt{ncview} utility is a very convenient and quick way + to plot netCDF data and it runs on most OSes: + \begin{rawhtml} \end{rawhtml} +\begin{verbatim} +http://meteora.ucsd.edu/~pierce/ncview_home_page.html +\end{verbatim} + \begin{rawhtml} \end{rawhtml} + +\item MatLAB(c) and other common post-processing environments provide + various netCDF interfaces including: + \begin{rawhtml} \end{rawhtml} +\begin{verbatim} +http://mexcdf.sourceforge.net/ +\end{verbatim} + \begin{rawhtml} \end{rawhtml} + \begin{rawhtml} \end{rawhtml} +\begin{verbatim} +http://woodshole.er.usgs.gov/staffpages/cdenham/public_html/MexCDF/nc4ml5.html +\end{verbatim} + \begin{rawhtml} \end{rawhtml} +\end{itemize} +