source: trunk/LMDZ.GENERIC/DOC/water.tex @ 2613

Last change on this file since 2613 was 987, checked in by jleconte, 12 years ago

11/06/2013 == JL+EM

  • User manual (+ sources) added in DOC.
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1\chapter{Water Cycle Simulation}
2
3\label{sc:water}
4
5To simulate the water cycle with the LMD Generic Model:
6
7\begin{itemize}
8\item In {\tt callphys.def}, set tracer to true: {\tt tracer=.true.}. In the radiative
9transfer sub-section, chose an appropriate correlated-k database that includes the effect
10of water vapour (e.g. {\tt corrkdir=CO2H2Ovar}), and set {\tt varactive=.true.}, {\tt varfixed=.false.}.
11In the water cycle sub-section you can chose various parameters - see below for a standard example.
12
13\input{input/h2o_list.tex}
14
15\item You need to compile with at least 2 tracers. If you don't have CO2 clouds,
16dust or other tracers, compilation is done with the command lines:
17\begin{verbatim}
18makegcm -d 64x48x20 -t 2 -p std -b 32x36 newstart
19\end{verbatim}
20\begin{verbatim}
21makegcm -d 64x48x20 -t 2 -p std -b 32x36 gcm
22\end{verbatim}
23
24Of course, you will also need an appropriate {\tt traceur.def} file
25indicating you will use tracers {\tt h2o\_vap} and {\tt h2o\_ice};
26if you only run with 2 tracers, then the contents of the {\tt traceur.def}
27file should be:
28\begin{verbatim}
292
30h2o_ice
31h2o_vap
32\end{verbatim}
33Note that the order in which tracers are set in the {\tt traceur.def} file
34is not important.
35
36\item {\bf Run} \\ \\
37Same as usual. Just make sure that your start files contains
38the initial states for water, with an initial state for water vapour / ice
39in the atmosphere and ice / liquid on the surface.
40
41\end {itemize}
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