Index: /NEMO/branches/2019/dev_r10984_HPC-13_IRRMANN_BDY_optimization/doc/latex/NEMO/subfiles/chap_LBC.tex
===================================================================
--- /NEMO/branches/2019/dev_r10984_HPC-13_IRRMANN_BDY_optimization/doc/latex/NEMO/subfiles/chap_LBC.tex	(revision 11530)
+++ /NEMO/branches/2019/dev_r10984_HPC-13_IRRMANN_BDY_optimization/doc/latex/NEMO/subfiles/chap_LBC.tex	(revision 11531)
@@ -363,5 +363,5 @@
 Options are defined through the \nam{bdy} \nam{bdy\_dta} namelist variables.
 The BDY module is the core implementation of open boundary conditions for regional configurations on
-temperature, salinity, barotropic and baroclinic velocities, as well as ice concentration, ice and snow thicknesses.
+ocean temperature, salinity, barotropic-baroclinic velocities, ice-snow concentration, thicknesses, temperatures, salinity and melt ponds concentration and thickness.
 
 The BDY module was modelled on the OBC module (see \NEMO\ 3.4) and shares many features and
@@ -379,18 +379,15 @@
 It is possible to define more than one boundary ``set'' and apply different boundary conditions to each set.
 The number of boundary sets is defined by \np{nb\_bdy}.
-Each boundary set may be defined as a set of straight line segments in a namelist
-(\np{ln\_coords\_file}\forcode{ = .false.}) or read in from a file (\np{ln\_coords\_file}\forcode{ = .true.}).
-If the set is defined in a namelist, then the namelists \nam{bdy\_index} must be included separately, one for each set.
-If the set is defined by a file, then a ``\ifile{coordinates.bdy}'' file must be provided.
+Each boundary set can be either defined as a series of straight line segments directly in the namelist
+(\np{ln\_coords\_file}\forcode{ = .false.}, and a namelist block \nam{bdy\_index} must be included for each set) or read in from a file (\np{ln\_coords\_file}\forcode{ = .true.}, and a ``\ifile{coordinates.bdy}'' file must be provided).
 The coordinates.bdy file is analagous to the usual \NEMO\ ``\ifile{coordinates}'' file.
 In the example above, there are two boundary sets, the first of which is defined via a file and
-the second is defined in a namelist.
+the second is defined in the namelist.
 For more details of the definition of the boundary geometry see section \autoref{subsec:BDY_geometry}.
 
 For each boundary set a boundary condition has to be chosen for the barotropic solution
 (``u2d'':sea-surface height and barotropic velocities), for the baroclinic velocities (``u3d''),
-for the active tracers \footnote{The BDY module does not deal with passive tracers at this version} (``tra''), and sea-ice (``ice'').
-For each set of variables there is a choice of algorithm and a choice for the data,
-eg. for the active tracers the algorithm is set by \np{cn\_tra} and the choice of data is set by \np{nn\_tra\_dta}.\\
+for the active tracers \footnote{The BDY module does not deal with passive tracers at this version} (``tra''), and for sea-ice (``ice'').
+For each set of variables one has to choose an algorithm and the boundary data (set resp. by \np{cn\_tra} and \np{cn\_tra} for tracers).\\
 
 The choice of algorithm is currently as follows:
@@ -407,11 +404,11 @@
 \end{description}
 
-The main choice for the boundary data is to use initial conditions as boundary data
-(\np{nn\_tra\_dta}\forcode{ = 0}) or to use external data from a file (\np{nn\_tra\_dta}\forcode{ = 1}).
+The boundary data is either set to initial conditions
+(\np{nn\_tra\_dta}\forcode{ = 0}) or forced with external data from a file (\np{nn\_tra\_dta}\forcode{ = 1}).
 In case the 3d velocity data contain the total velocity (ie, baroclinic and barotropic velocity),
 the bdy code can derived baroclinic and barotropic velocities by setting \np{ln\_full\_vel}\forcode{ = .true. }
 For the barotropic solution there is also the option to use tidal harmonic forcing either by
 itself (\np{nn\_dyn2d\_dta}\forcode{ = 2}) or in addition to other external data (\np{nn\_dyn2d\_dta}\forcode{ = 3}).\\
-Sea-ice salinity, temperature and age data at the boundary are constant and defined repectively by \np{rn\_ice\_sal}, \np{rn\_ice\_tem} and \np{rn\_ice\_age}.
+If not set to initial conditions, sea-ice salinity, temperatures and melt ponds data at the boundary can either be read in a file or defined as constant (by \np{rn\_ice\_sal}, \np{rn\_ice\_tem}, \np{rn\_ice\_apnd}, \np{rn\_ice\_hpnd}). Ice age is constant and defined by \np{rn\_ice\_age}.
 
 If external boundary data is required then the \nam{bdy\_dta} namelist must be defined.
@@ -423,5 +420,6 @@
 For each required variable, the filename, the frequency of the files and
 the frequency of the data in the files are given.
-Also whether or not time-interpolation is required and whether the data is climatological (time-cyclic) data.\\
+Also whether or not time-interpolation is required and whether the data is climatological (time-cyclic) data.
+For sea-ice salinity, temperatures and melt ponds, reading the files are skipped and constant values are used if filenames are defined as {'NOT USED'}.\\
 
 There is currently an option to vertically interpolate the open boundary data onto the native grid at run-time.
