void write_grid_file(void) {
/* The following subroutine saves the depth, reduced gravity of */
/* each interface, the potential density of each layer, and the */
/* Coriolis parameter. A variety of metric terms are written to a */
/* separate file. */
char filename[40]; /* The file name of the save file. */
char filepath[120]; /* The path (dir/file) to the file. */
int i, j, cdfid, timeid;
size_t err = 1;
struct varcdfinfo varinfo[10];
/* vardesc is a structure defined in HIM_io.h. The elements of */
/* this structure, in order, are: (1) the variable name for the NetCDF*/
/* file; (2) the variable's long name; (3) a character indicating the */
/* horizontal grid, which may be '1' (column), 'h', 'q', 'u', or 'v', */
/* for the corresponding C-grid variable; (4) a character indicating */
/* the vertical grid, which may be 'L' (layer), 'i' (interface), */
/* '2' (mixed-layers), or '1' (no vertical location); (5) a character */
/* indicating the time levels of the field, which may be 's' (snap- */
/* shot), 'a' (average between snapshots), 'm' (monthly average), or */
/* '1' (no time variation); (6) the variable's units; and (7) a */
/* character indicating the size in memory to write, which may be */
/* 'd' (8-byte) or 'f' (4-byte). */
vardesc vars[4] = {
{"D","Basin Depth",'h','1','1',"meter", 'd'},
{"g","Reduced gravity",'1','L','1',"meter second-2", 'd'},
{"R","Target Potential Density",'1','L','1',"kilogram meter-3", 'd'},
{"f","Coriolis Parameter",'q','1','1',"second-1", 'd'}
};
sprintf(filename,"D.%d.%d.%d",NXTOT,NYTOT,NZ);
strcpy(filepath, directory);
strcat(filepath, filename);
create_file(filepath, vars, 4, &cdfid, &timeid, varinfo);
err *= write_field(cdfid, vars[0], varinfo[0], 0, D[0]);
err *= write_field(cdfid, vars[1], varinfo[1], 0, g);
err *= write_field(cdfid, vars[2], varinfo[2], 0, Rlay);
err *= write_field(cdfid, vars[3], varinfo[3], 0, f[0]);
close_file(&cdfid);
if (err == 0)
printf("Problems saving general parameters.\n");
{
/* ### REVISIT THIS PART OF THE ROUTINE AFTER METRICS... ### */
double out[NYMEM][NXMEM]; /* An array for output. */
extern double hmask[NYMEM][NXMEM];
vardesc vars2[10]={
{"geolatb","latitude at q points",'q','1','1',"degree",'d'},
{"geolonb","longitude at q points",'q','1','1',"degree",'d'},
{"wet", "land or ocean?", 'h','1','1',"none",'d'},
{"geolat", "latitude at h points", 'h','1','1',"degree",'d'},
{"geolon","longitude at h points",'h','1','1',"degree",'d'},
{"dxh","Zonal grid spacing at h points",'h','1','1',"m",'d'},
{"dxq","Zonal grid spacing at q points",'q','1','1',"m",'d'},
{"dyh","Meridional grid spacing at h points",'h','1','1',"m",'d'},
{"dyq","Meridional grid spacing at q points",'q','1','1',"m",'d'},
{"Ah","Area of h cells",'h','1','1',"m2",'d'},
};
sprintf(filename,"grid.%d.%d",NXTOT,NYTOT);
strcpy(filepath, directory);
strcat(filepath, filename);
create_file(filepath, vars2, 10, &cdfid, &timeid, varinfo);
err *= write_field(cdfid, vars2[0], varinfo[0], 0, geolatq[0]);
err *= write_field(cdfid, vars2[1], varinfo[1], 0, geolonq[0]);
err *= write_field(cdfid, vars2[2], varinfo[2], 0, hmask[0]);
err *= write_field(cdfid, vars2[3], varinfo[3], 0, geolath[0]);
err *= write_field(cdfid, vars2[4], varinfo[4], 0, geolonh[0]);
for (j=0;j<NYMEM;j++) for (i=0;i<NXMEM;i++) out[j][i]=DXh(j,i);
err *= write_field(cdfid, vars2[5], varinfo[5], 0, out[0]);
for (j=0;j<NYMEM;j++) for (i=0;i<NXMEM;i++) out[j][i]=DXq(j,i);
err *= write_field(cdfid, vars2[6], varinfo[6], 0, out[0]);
for (j=0;j<NYMEM;j++) for (i=0;i<NXMEM;i++) out[j][i]=DYh(j,i);
err *= write_field(cdfid, vars2[7], varinfo[7], 0, out[0]);
for (j=0;j<NYMEM;j++) for (i=0;i<NXMEM;i++) out[j][i]=DYq(j,i);
err *= write_field(cdfid, vars2[8], varinfo[8], 0, out[0]);
for (j=0;j<NYMEM;j++) for (i=0;i<NXMEM;i++) out[j][i]=DXDYh(j,i);
err *= write_field(cdfid, vars2[9], varinfo[9], 0, out[0]);
close_file(&cdfid);
if (err == 0)
printf("Problems saving latitude and longitude and wet.\n");
}
}
void set_metrics(void)
{
int i,j;
extern double areagr[NXMEM][NYMEM];
double Iareagr[NXMEM][NYMEM];
/* Calculate the values of the metric terms that might be used */
/* and save them in arrays. */
#ifdef CARTESIAN
/* On a cartesian grid, the various DX... and DY... macros all */
/* point to the same scalars. */
i = 0; j = 0;
DXh(i,j) = RE * LENLON * M_PI / (180.0 * NXTOT);
DYh(i,j) = RE * LENLAT * M_PI / (180.0 * NYTOT);
IDXh(i,j) = 1.0 / DXh(i,j);
IDYh(i,j) = 1.0 / DYh(i,j);
DXDYh(i,j) = DXh(i,j) * DYh(i,j);
IDXDYh(i,j) = IDXh(i,j) * IDYh(i,j);
for (j=Y0-1;j<=ny+2;j++)
latq[j] = LOWLAT + LENLAT*(double)(j-Y0+Y0abs)/(double)NYTOT;
for (j=Y0;j<=ny;j++)
lath[j] = LOWLAT + LENLAT*((double)(j-Y0+Y0abs)-0.5)/(double)NYTOT;
for (i=X0-1;i<=nx+2;i++)
lonq[i] = WESTLON + LENLON*(double)(i-X0+X0abs)/(double)NXTOT;
for (i=X0;i<=nx;i++)
lonh[i] = WESTLON + LENLON*((double)(i-X0+X0abs)-0.5)/(double)NXTOT;
# if defined(PARALLEL_Y) && !defined(PARALLEL_IO) && defined(NETCDF_OUTPUT)
for (j=Y0;j<=NYTOT+Y0;j++)
latq_tot[j] = LOWLAT + LENLAT*(double)(j-Y0)/(double)NYTOT;
for (j=Y0;j<=NYTOT+Y0;j++)
lath_tot[j] = LOWLAT + LENLAT*((double)(j-Y0)-0.5)/(double)NYTOT;
# endif
# if defined(PARALLEL_X) && !defined(PARALLEL_IO) && defined(NETCDF_OUTPUT)
for (i=X0;i<=NXTOT+X0;i++)
lonq_tot[i] = WESTLON + LENLON*(double)(i-X0)/(double)NXTOT;
for (i=X0;i<=NXTOT+X0;i++)
lonh_tot[i] = WESTLON + LENLON*((double)(i-X0)-0.5)/(double)NXTOT;
# endif
#else
/* All of the metric terms should be defined over the domain from */
/* X0-1 to nx+2. Outside of the physical domain, both the metrics */
/* and their inverses may be set to zero. */
/* Any points that are outside of the computational domain should */
/* have their values set to zero _BEFORE_ setting the other metric */
/* terms, because these macros may or may not expand to 2-dimensional */
/* arrays. */
/* The metric terms within the computational domain are set here. */
# ifdef ISOTROPIC
{
double C0, I_C0, yq, yh, jd;
double fnRef, yRef; /* fnRef is the value of the integral of */
/* 1/(dx*cos(lat)) from the equator to a */
/* reference latitude, while yRef is the */
/* j-index of that reference latitude. */
int itt1, itt2;
C0 = M_PI*((double) LENLON / (double) (180*NXTOT)); I_C0 = 1.0 / C0;
/* With an isotropic grid, the north-south extent of the domain, */
/* the east-west extent, and the number of grid points in each */
/* direction are _not_ independent. Here the north-south extent */
/* will be determined to fit the east-west extent and the number of */
/* grid points. The grid is perfectly isotropic. */
# ifdef NORTHREFERENCE
/* The following 2 lines fixes the refererence latitude at the */
/* northern edge of the domain, LOWLAT+LENLAT at j=NYTOT+Y0. */
yRef = Y0abs - Y0 - NYTOT;
fnRef = I_C0 * INTSECY(((LOWLAT+LENLAT)*M_PI/180.0));
# else
/* The following line sets the refererence latitude LOWLAT at j=Y0. */
yRef = Y0abs - Y0; fnRef = I_C0 * INTSECY((LOWLAT*M_PI/180.0));
# endif
/* Everything else should pretty much work. */
yq = LOWLAT*M_PI/180.0;
/* If the model is in parallel in the Y-direction, do the same set of */
/* calculations which would occur on a single processor. */
for (j=Y0-1-Y0abs;j<Y0-1;j++) {
jd = fnRef + (double) (j + yRef) - 0.5;
yh = find_root(jd,yq,&itt1);
jd = fnRef + (double) (j + yRef);
yq = find_root(jd,yh,&itt2);
# if defined(PARALLEL_Y) && !defined(PARALLEL_IO) && defined(NETCDF_OUTPUT)
latq_tot[j+Y0abs] = yq*180.0/M_PI;
lath_tot[j+Y0abs] = yh*180.0/M_PI;
# endif
}
for (j=Y0-1;j<=ny+2;j++) {
jd = fnRef + (double) (j + yRef) - 0.5;
yh = find_root(jd,yq,&itt1);
jd = fnRef + (double) (j + yRef);
yq = find_root(jd,yh,&itt2);
latq[j] = yq*180.0/M_PI;
lath[j] = yh*180.0/M_PI;
# if defined(PARALLEL_Y) && !defined(PARALLEL_IO) && defined(NETCDF_OUTPUT)
latq_tot[j+Y0abs] = yq*180.0/M_PI;
lath_tot[j+Y0abs] = yh*180.0/M_PI;
# endif
for (i=X0-1;i<=nx+2;i++) {
DXq(i,j) = cos(yq) * (RE * C0);
DYq(i,j) = DXq(i,j);
DXv(i,j) = DXq(i,j);
DYv(i,j) = DYq(i,j);
DXh(i,j) = cos(yh) * (RE * C0);
DYh(i,j) = DXh(i,j);
DXu(i,j) = DXh(i,j);
DYu(i,j) = DYh(i,j);
}
}
# if defined(PARALLEL_Y) && !defined(PARALLEL_IO) && defined(NETCDF_OUTPUT)
for (j=ny+3;j<=NYTOT+Y0-Y0abs;j++) {
jd = fnRef + (double) (j + yRef) - 0.5;
yh = find_root(jd,yq,&itt1);
jd = fnRef + (double) (j + yRef);
yq = find_root(jd,yh,&itt2);
latq_tot[j+Y0abs] = yq*180.0/M_PI;
lath_tot[j+Y0abs] = yh*180.0/M_PI;
}
# endif
}
for (i=X0-1;i<=nx+2;i++)
lonq[i] = WESTLON + LENLON*(double)(i-X0+X0abs)/(double)NXTOT;
for (i=X0;i<=nx;i++)
lonh[i] = WESTLON + LENLON*((double)(i-X0+X0abs)-0.5)/(double)NXTOT;
# if defined(PARALLEL_X) && !defined(PARALLEL_IO) && defined(NETCDF_OUTPUT)
for (i=X0;i<=NXTOT+X0;i++)
lonq_tot[i] = WESTLON + LENLON*(double)(i-X0)/(double)NXTOT;
for (i=X0;i<=NXTOT+X0;i++)
lonh_tot[i] = WESTLON + LENLON*((double)(i-X0)-0.5)/(double)NXTOT;
# endif
# else /* ISOTROPIC */
/* This code implements latitude/longitude coordinates on a sphere. */
//BX-a
// for (j=0;j<=NYTOT-1;j++) {
//HF for (j=Y0-1;j<=ny+2;j++) {
for (j=2;j<NYTOT+2;j++) {
latq[j] = qlat[j];
lath[j] = hlat[j];
}
//BX-e
/* HF for (i=0;i<=NXTOT-1;i++) {
for (j=0;j<=NYTOT-1;j++) {
DXq(i+2,j+2) = dxq[j][i];
DYq(i+2,j+2) = dyq[j][i];
DXv(i+2,j+2) = dxv[j][i];
DYv(i+2,j+2) = dyv[j][i];
DXh(i+2,j+2) = dxh[j][i];
DYh(i+2,j+2) = dyh[j][i];
DXu(i+2,j+2) = dxu[j][i];
DYu(i+2,j+2) = dyu[j][i];
}
} */
//BX-a
for (i=X0-1;i<=nx+2;i++)
lonq[i] = WESTLON + LENLON*(double)(i-X0+X0abs)/(double)NXTOT;
for (i=X0;i<=nx;i++)
lonh[i] = WESTLON + LENLON*((double)(i-X0+X0abs)-0.5)/(double)NXTOT;
//BX-e
#endif
/* The remaining code should not be changed. */
for (i=X0-1;i<=nx+2;i++) {
for (j=Y0-1;j<=ny+2;j++) {
IDXh(i,j) = (DXh(i,j) > 0.0) ? (1.0 / DXh(i,j)) : 0.0;
IDXu(i,j) = (DXu(i,j) > 0.0) ? (1.0 / DXu(i,j)) : 0.0;
IDXv(i,j) = (DXv(i,j) > 0.0) ? (1.0 / DXv(i,j)) : 0.0;
IDXq(i,j) = (DXq(i,j) > 0.0) ? (1.0 / DXq(i,j)) : 0.0;
IDYh(i,j) = (DYh(i,j) > 0.0) ? (1.0 / DYh(i,j)) : 0.0;
IDYu(i,j) = (DYu(i,j) > 0.0) ? (1.0 / DYu(i,j)) : 0.0;
IDYv(i,j) = (DYv(i,j) > 0.0) ? (1.0 / DYv(i,j)) : 0.0;
IDYq(i,j) = (DYq(i,j) > 0.0) ? (1.0 / DYq(i,j)) : 0.0;
//HF alternate def: DXDYh(i,j) = DXh(i,j) * DYh(i,j);
//HF alternate def: IDXDYh(i,j) = IDXh(i,j) * IDYh(i,j);
DXDYq(i,j) = DXq(i,j) * DYq(i,j);
IDXDYq(i,j) = IDXq(i,j) * IDYq(i,j);
Iareagr[i][j] = (areagr[i][j] > 0.0) ? (1.0 / areagr[i][j]) : 0.0;
DXDYh(i,j) = areagr[i][j];
IDXDYh(i,j) = Iareagr[i][j];
}
}
#endif /* CARTESIAN */
}