1 |
C $Header: /u/gcmpack/MITgcm/model/src/calc_surf_dr.F,v 1.19 2012/06/01 18:42:24 jmc Exp $ |
2 |
C $Name: $ |
3 |
|
4 |
#include "PACKAGES_CONFIG.h" |
5 |
#include "CPP_OPTIONS.h" |
6 |
|
7 |
CBOP |
8 |
C !ROUTINE: CALC_SURF_DR |
9 |
C !INTERFACE: |
10 |
SUBROUTINE CALC_SURF_DR( etaFld, |
11 |
I myTime, myIter, myThid ) |
12 |
C !DESCRIPTION: \bv |
13 |
C *==========================================================* |
14 |
C | SUBROUTINE CALC_SURF_DR |
15 |
C | o Calculate the new surface level thickness according to |
16 |
C | the surface r-position (Non-Linear Free-Surf) |
17 |
C | o take decision if grid box becomes too thin or too thick |
18 |
C *==========================================================* |
19 |
C \ev |
20 |
|
21 |
C !USES: |
22 |
IMPLICIT NONE |
23 |
C == Global variables |
24 |
#include "SIZE.h" |
25 |
#include "EEPARAMS.h" |
26 |
#include "PARAMS.h" |
27 |
#include "GRID.h" |
28 |
#include "SURFACE.h" |
29 |
|
30 |
C !INPUT/OUTPUT PARAMETERS: |
31 |
C == Routine arguments == |
32 |
C etaFld :: current eta field used to update the hFactor |
33 |
C myTime :: current time in simulation |
34 |
C myIter :: current iteration number in simulation |
35 |
C myThid :: thread number for this instance of the routine. |
36 |
_RL etaFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
37 |
_RL myTime |
38 |
INTEGER myIter |
39 |
INTEGER myThid |
40 |
|
41 |
#ifdef NONLIN_FRSURF |
42 |
|
43 |
C !LOCAL VARIABLES: |
44 |
C Local variables |
45 |
C i,j,k,bi,bj :: loop counter |
46 |
C rSurftmp :: free surface r-position that is used to compute hFac_surf |
47 |
C adjust_nb_pt :: Nb of grid points where rSurf is adjusted (hFactInf) |
48 |
C adjust_volum :: adjustment effect on the volume (domain size) |
49 |
C numbWrite :: count the Number of warning written on STD-ERR file |
50 |
C numbWrMax :: maximum Number of warning written on STD-ERR file |
51 |
INTEGER i,j,bi,bj |
52 |
INTEGER ks, numbWrite, numbWrMax |
53 |
_RL hFactmp, adjust_nb_pt, adjust_volum |
54 |
_RL rSurftmp(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
55 |
_RS hhm, hhp |
56 |
c CHARACTER*(MAX_LEN_MBUF) suff |
57 |
CEOP |
58 |
DATA numbWrite / 0 / |
59 |
numbWrMax = Nx*Ny |
60 |
|
61 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
62 |
|
63 |
adjust_nb_pt = 0. |
64 |
adjust_volum = 0. |
65 |
|
66 |
DO bj=myByLo(myThid), myByHi(myThid) |
67 |
DO bi=myBxLo(myThid), myBxHi(myThid) |
68 |
|
69 |
C-- before updating hFac_surfC/S/W save current fields |
70 |
DO j=1-OLy,sNy+OLy |
71 |
DO i=1-OLx,sNx+OLx |
72 |
hFac_surfNm1C(i,j,bi,bj) = hFac_surfC(i,j,bi,bj) |
73 |
hFac_surfNm1S(i,j,bi,bj) = hFac_surfS(i,j,bi,bj) |
74 |
hFac_surfNm1W(i,j,bi,bj) = hFac_surfW(i,j,bi,bj) |
75 |
ENDDO |
76 |
ENDDO |
77 |
|
78 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
79 |
C-- Compute the new fractional thickness of surface level (kSurfC): |
80 |
|
81 |
DO j=0,sNy+1 |
82 |
DO i=0,sNx+1 |
83 |
rSurftmp(i,j) = Ro_surf(i,j,bi,bj)+etaFld(i,j,bi,bj) |
84 |
ks = kSurfC(i,j,bi,bj) |
85 |
IF (ks.LE.Nr) THEN |
86 |
IF ( rSurftmp(i,j).LT.Rmin_surf(i,j,bi,bj) ) THEN |
87 |
C-- Needs to do something : |
88 |
IF (numbWrite.LE.numbWrMax) THEN |
89 |
numbWrite = numbWrite + 1 |
90 |
hFactmp = h0FacC(i,j,ks,bi,bj) |
91 |
& + ( rSurftmp(i,j) - Ro_surf(i,j,bi,bj) )*recip_drF(ks) |
92 |
IF (hFactmp.LT.hFacInf) THEN |
93 |
WRITE(errorMessageUnit,'(2A,6I4,I10)') |
94 |
& 'WARNING: hFacC < hFacInf at:', |
95 |
& ' i,j,k,bi,bj,Thid,Iter=',i,j,ks,bi,bj,myThid,myIter |
96 |
ELSE |
97 |
WRITE(errorMessageUnit,'(2A,6I4,I10)') |
98 |
& 'WARNING: hFac < hFacInf near:', |
99 |
& ' i,j,k,bi,bj,Thid,Iter=',i,j,ks,bi,bj,myThid,myIter |
100 |
ENDIF |
101 |
WRITE(errorMessageUnit,'(A,2F10.6,1PE14.6)') |
102 |
& 'hFac_n-1,hFac_n,eta =', |
103 |
& hfacC(i,j,ks,bi,bj), hFactmp, etaFld(i,j,bi,bj) |
104 |
ENDIF |
105 |
C-- Decide to STOP : |
106 |
c WRITE(errorMessageUnit,'(A)') |
107 |
c & 'STOP in CALC_SURF_DR : too SMALL hFac !' |
108 |
c STOP 'ABNORMAL END: S/R CALC_SURF_DR' |
109 |
C-- Or continue with Rmin_surf: |
110 |
IF ( i.GE.1.AND.i.LE.sNx .AND. |
111 |
& j.GE.1.AND.j.LE.sNy ) THEN |
112 |
adjust_nb_pt = adjust_nb_pt + 1. |
113 |
adjust_volum = adjust_volum |
114 |
& + rA(i,j,bi,bj)*(Rmin_surf(i,j,bi,bj)-rSurftmp(i,j)) |
115 |
ENDIF |
116 |
rSurftmp(i,j) = Rmin_surf(i,j,bi,bj) |
117 |
C---------- |
118 |
ENDIF |
119 |
|
120 |
C-- Set hFac_surfC : |
121 |
hFac_surfC(i,j,bi,bj) = h0FacC(i,j,ks,bi,bj) |
122 |
& + ( rSurftmp(i,j) - Ro_surf(i,j,bi,bj) |
123 |
& )*recip_drF(ks)*maskC(i,j,ks,bi,bj) |
124 |
|
125 |
C-- Usefull warning when hFac becomes very large: |
126 |
IF ( numbWrite.LE.numbWrMax .AND. |
127 |
& hFac_surfC(i,j,bi,bj).GT.hFacSup ) THEN |
128 |
numbWrite = numbWrite + 1 |
129 |
WRITE(errorMessageUnit,'(2A,6I4,I10)') |
130 |
& 'WARNING: hFacC > hFacSup at:', |
131 |
& ' i,j,k,bi,bj,Thid,Iter=',i,j,ks,bi,bj,myThid,myIter |
132 |
WRITE(errorMessageUnit,'(A,2F10.6,1PE14.6)') |
133 |
& 'hFac_n-1,hFac_n,eta =', hfacC(i,j,ks,bi,bj), |
134 |
& hFac_surfC(i,j,bi,bj), etaFld(i,j,bi,bj) |
135 |
ENDIF |
136 |
C---------- |
137 |
ENDIF |
138 |
|
139 |
ENDDO |
140 |
ENDDO |
141 |
|
142 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
143 |
C-- Compute fractional thickness of surface level, for U & V point: |
144 |
|
145 |
DO j=1,sNy |
146 |
DO i=1,sNx+1 |
147 |
ks = kSurfW(i,j,bi,bj) |
148 |
IF (ks.LE.Nr) THEN |
149 |
C- allows hFacW to be larger than surrounding hFacC=1 @ edge of a step with |
150 |
C different kSurfC on either side (topo in p-coords, ice-shelf in z-coords) |
151 |
hhm = rSurftmp(i-1,j) |
152 |
hhp = rSurftmp(i,j) |
153 |
C- make sure hFacW is not larger than the 2 surrounding hFacC |
154 |
c hhm = rF(ks) |
155 |
c IF(ks.EQ.kSurfC(i-1,j,bi,bj)) hhm = rSurftmp(i-1,j) |
156 |
c hhp = rF(ks) |
157 |
c IF(ks.EQ.kSurfC(i,j,bi,bj)) hhp = rSurftmp(i,j) |
158 |
hFac_surfW(i,j,bi,bj) = h0FacW(i,j,ks,bi,bj) |
159 |
& + ( MIN(hhm,hhp) |
160 |
& - MIN( Ro_surf(i-1,j,bi,bj), Ro_surf(i,j,bi,bj) ) |
161 |
& )*recip_drF(ks)*maskW(i,j,ks,bi,bj) |
162 |
ENDIF |
163 |
ENDDO |
164 |
ENDDO |
165 |
|
166 |
DO j=1,sNy+1 |
167 |
DO i=1,sNx |
168 |
ks = kSurfS(i,j,bi,bj) |
169 |
IF (ks.LE.Nr) THEN |
170 |
C- allows hFacS to be larger than surrounding hFacC=1 @ edge of a step with |
171 |
C different kSurfC on either side (topo in p-coords, ice-shelf in z-coords) |
172 |
hhm = rSurftmp(i,j-1) |
173 |
hhp = rSurftmp(i,j) |
174 |
C- make sure hFacS is not larger than the 2 surrounding hFacC |
175 |
c hhm = rF(ks) |
176 |
c IF(ks.EQ.kSurfC(i,j-1,bi,bj)) hhm = rSurftmp(i,j-1) |
177 |
c hhp = rF(ks) |
178 |
c IF(ks.EQ.kSurfC(i,j,bi,bj)) hhp = rSurftmp(i,j) |
179 |
hFac_surfS(i,j,bi,bj) = h0FacS(i,j,ks,bi,bj) |
180 |
& + ( MIN(hhm,hhp) |
181 |
& - MIN( Ro_surf(i,j-1,bi,bj), Ro_surf(i,j,bi,bj) ) |
182 |
& )*recip_drF(ks)*maskS(i,j,ks,bi,bj) |
183 |
ENDIF |
184 |
ENDDO |
185 |
ENDDO |
186 |
|
187 |
#ifdef ALLOW_OBCS |
188 |
C-- Apply OBC to hFac_surfW,S before the EXCH calls |
189 |
IF ( useOBCS ) THEN |
190 |
CALL OBCS_APPLY_SURF_DR( |
191 |
I bi, bj, etaFld, |
192 |
U hFac_surfC, hFac_surfW, hFac_surfS, |
193 |
I myTime, myIter, myThid ) |
194 |
ENDIF |
195 |
#endif /* ALLOW_OBCS */ |
196 |
|
197 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
198 |
|
199 |
C- end bi,bj loop. |
200 |
ENDDO |
201 |
ENDDO |
202 |
|
203 |
C-- Global diagnostic : |
204 |
_GLOBAL_SUM_RL( adjust_nb_pt , myThid ) |
205 |
IF ( adjust_nb_pt.GE.1. ) THEN |
206 |
_GLOBAL_SUM_RL( adjust_volum , myThid ) |
207 |
_BEGIN_MASTER( myThid ) |
208 |
WRITE(standardMessageUnit,'(2(A,I10),1PE16.8)') |
209 |
& ' SURF_ADJUSTMENT: Iter=', myIter, |
210 |
& ' Nb_pts,Vol=', nint(adjust_nb_pt), adjust_volum |
211 |
_END_MASTER( myThid ) |
212 |
ENDIF |
213 |
|
214 |
_EXCH_XY_RS(hFac_surfC, myThid ) |
215 |
CALL EXCH_UV_XY_RS(hFac_surfW,hFac_surfS,.FALSE.,myThid) |
216 |
|
217 |
C----- |
218 |
C Note: testing kSurfW,S is equivalent to a full height mask |
219 |
C ==> no need for applying the mask here. |
220 |
C and with "partial thin wall" ==> mask could be applied in S/R UPDATE_SURF_DR |
221 |
C----- |
222 |
|
223 |
c IF ( myIter.GE.0 ) THEN |
224 |
c WRITE(suff,'(I10.10)') myIter |
225 |
c CALL WRITE_FLD_XY_RS( 'hFac_surfC.', suff, hFac_surfC, |
226 |
c & myIter, myThid ) |
227 |
c ENDIF |
228 |
|
229 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
230 |
#endif /* NONLIN_FRSURF */ |
231 |
|
232 |
RETURN |
233 |
END |