Changeset 4230 for branches/2013/dev_LOCEAN_CMCC_INGV_2013/DOC/TexFiles/Chapters/Chap_SBC.tex

Timestamp:

2013-11-18T12:57:11+01:00 (10 years ago)

Author:

cetlod

Message:

dev_LOCEAN_CMCC_INGV_2013 : merge LOCEAN & CMCC_INGV branches, see ticket #1182

File:

• branches/2013/dev_LOCEAN_CMCC_INGV_2013/DOC/TexFiles/Chapters/Chap_SBC.tex (modified) (5 diffs)

branches/2013/dev_LOCEAN_CMCC_INGV_2013/DOC/TexFiles/Chapters/Chap_SBC.tex

@@ -39 +39 @@
 be supplied which maps the data from the supplied grid to the model points 
 (so called "Interpolation on the Fly", see \S\ref{SBC_iof}).
+If the Interpolation on the Fly option is used, input data belonging to land points (in the native grid),
+can be masked to avoid spurious results in proximity of the coasts  as large sea-land gradients characterize
+most of the atmospheric variables.
 In addition, the resulting fields can be further modified using several namelist options. 
 These options control  the rotation of vector components supplied relative to an east-north 
@@ -197 +200 @@
 to defined the input data file and variable names, the frequency of the data (in hours or months), 
 whether its is climatological data or not, the period covered by the input file (one year, month, week or day), 
-and two additional parameters for on-the-fly interpolation. When adding a new input variable, 
+and three additional parameters for on-the-fly interpolation. When adding a new input variable, 
 the developer has to add the associated structure in the namelist, read this information 
 by mirroring the namelist read in \rou{sbc\_blk\_init} for example, and simply call \rou{fld\_read} 
@@ -220 +223 @@
 \begin{alltt}  {{\tiny    
 \begin{verbatim}
-!  file name  ! frequency (hours) ! variable  ! time interp. !  clim  ! 'yearly'/ ! weights  ! rotation ! 
-!             !  (if <0  months)  !   name    !   (logical)  !  (T/F) ! 'monthly' ! filename ! pairing  !
+!  file name  ! frequency (hours) ! variable  ! time interp. !  clim  ! 'yearly'/ ! weights  ! rotation ! land/sea mask ! 
+!             !  (if <0  months)  !   name    !   (logical)  !  (T/F) ! 'monthly' ! filename ! pairing  ! filename      !
 \end{verbatim}
 }}\end{alltt} 
@@ -282 +285 @@
 is not starting at the beginning of the year. 
 
-\item[Others]: 'weights filename' and 'pairing rotation' are associted with on-the-fly interpolation 
+\item[Others]: 'weights filename', 'pairing rotation' and 'land/sea mask' are associted with on-the-fly interpolation 
 which is described in \S\ref{SBC_iof}.
 
@@ -337 +340 @@
 assumed by the model.
 Two methods are currently available: bilinear and bicubic interpolation.
+Prior to the interpolation, providing a land/sea mask file, the user can decide to
+ remove land points from the input file and substitute the corresponding values 
+with the average of the 8 neighbouring points in the native external grid.
+ Only "sea points" are considered for the averaging. The land/sea mask file must 
+be provided in the structure associated with the input variable.
+ The netcdf land/sea mask variable name must be 'LSM' it must have the same 
+horizontal and vertical dimensions of the associated variable and should 
+be equal to 1 over land and 0 elsewhere.
+The procedure can be recursively applied setting nn_lsm > 1 in namsbc namelist. 
+Note that nn_lsm=0 forces the code to not apply the procedure even if a file for land/sea mask is supplied.
 
 \subsubsection{Bilinear Interpolation}