Changeset 3607 for branches/2012/dev_NOC_2012_rev3555/DOC/TexFiles/Chapters

Timestamp:

2012-11-19T16:24:13+01:00 (12 years ago)

Author:

acc

Message:

Branch dev_NOC_2012_rev3555. #1006. Step 2: Add changes from the 2012/dev_r3322_NOCS09_SAS (Stand Alone Surface module) branch

File:

• branches/2012/dev_NOC_2012_rev3555/DOC/TexFiles/Chapters/Chap_SBC.tex (modified) (1 diff)

branches/2012/dev_NOC_2012_rev3555/DOC/TexFiles/Chapters/Chap_SBC.tex

@@ -431 +431 @@
 (see the directory NEMOGCM/TOOLS/WEIGHTS).
 
+% -------------------------------------------------------------------------------------------------------------
+% Standalone Surface Boundary Condition Scheme
+% -------------------------------------------------------------------------------------------------------------
+\subsection [Standalone Surface Boundary Condition Scheme] {Standalone Surface Boundary Condition Scheme}
+\label{SAS_iof}
+
+In some circumstances it may be useful to avoid calculating the 3D temperature, salinity and velocity fields and
+simply read them in from  a previous run.  For example:
+
+\begin{enumerate}
+\item  Multiple runs of the model are required in code development to see the affect of different algorithms in
+       the bulk formulae.
+\item  The effect of different parameter sets in the ice model is to be examined.
+\end{enumerate}
+
+The StandAlone Surface scheme provides this utility.
+A new copy of the model has to be compiled with a configuration based on ORCA2_SAS_LIM.
+However no namelist parameters need be changed from the settings of the previous run (except perhaps nn{\_}date0)
+In this configuration, a few routines in the standard model are overriden by new versions.
+Routines replaced are:
+
+\begin{enumerate}
+\item  nemogcm.F90
+
+       This routine initialises the rest of the model and repeatedly calls the stp time stepping routine (step.F90)
+       Since the ocean state is not calculated all associated initialisations have been removed.
+\item  step.F90
+
+       The main time stepping routine now only needs to call the sbc routine (and a few utility functions).
+\item  sbcmod.F90
+
+       This has been cut down and now only calculates surface forcing and the ice model required.  New surface modules
+       that can function when only the surface level of the ocean state is defined can also be added (e.g. icebergs).
+\item  daymod.F90
+
+       No ocean restarts are read or written (though the ice model restarts are retained), so calls to restart functions
+       have been removed.  This also means that the calendar cannot be controlled by time in a restart file, so the user
+       must make sure that nn{\_}date0 in the model namelist is correct for his or her purposes.
+\item  stpctl.F90
+
+       Since there is no free surface solver, references to it have been removed from stp_ctl.
+\item  diawri.F90
+
+       All 3D data have been removed from the output.  The surface temperature, salinity and velocity components (which
+       have been read in) are written along with relevant forcing and ice data.
+\end{enumerate}
+
+One new routine has been added:
+
+\begin{enumerate}
+\item  sbcsas.F90
+       This routine initialises the input files needed for reading temperature, salinity and velocity arrays at the surface.
+       These filenames are supplied in namelist namsbc{\_}sas.  Unfortunately because of limitations with the \mdl{iom} module,
+       the full 3D fields from the mean files have to be read in and interpolated in time, before using just the top level.
+       Since fldread is used to read in the data, Interpolation on the Fly may be used to change input data resolution.
+\end{enumerate}
 
 % ================================================================