/[MITgcm]/MITgcm/pkg/mom_fluxform/mom_u_del2u.F
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Annotation of /MITgcm/pkg/mom_fluxform/mom_u_del2u.F

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Revision 1.3 - (hide annotations) (download)
Wed Sep 26 19:05:21 2001 UTC (22 years, 8 months ago) by adcroft
Branch: MAIN
CVS Tags: checkpoint46n_post, checkpoint47e_post, checkpoint44e_post, checkpoint46l_post, checkpoint46g_pre, checkpoint47c_post, release1_p13_pre, checkpoint46f_post, checkpoint44f_post, checkpoint46b_post, checkpoint43a-release1mods, release1_p13, checkpoint46l_pre, chkpt44d_post, release1_p8, release1_p9, release1_p1, release1_p2, release1_p3, release1_p4, release1_p5, release1_p6, release1_p7, checkpoint44e_pre, release1_b1, checkpoint48b_post, checkpoint43, checkpoint48c_pre, checkpoint47d_pre, release1_chkpt44d_post, checkpoint47a_post, checkpoint48d_pre, checkpoint47i_post, release1_p11, checkpoint47d_post, icebear5, icebear4, icebear3, icebear2, checkpoint46d_pre, checkpoint48d_post, release1-branch_tutorials, checkpoint45d_post, checkpoint46j_pre, chkpt44a_post, checkpoint44h_pre, checkpoint46a_post, checkpoint47g_post, checkpoint46j_post, checkpoint46k_post, chkpt44c_pre, checkpoint48a_post, checkpoint45a_post, ecco_c44_e19, ecco_c44_e18, ecco_c44_e17, ecco_c44_e16, release1_p12, release1_p10, release1_p16, release1_p17, release1_p14, release1_p15, checkpoint47j_post, branch-exfmods-tag, checkpoint44g_post, checkpoint46e_pre, checkpoint48c_post, checkpoint45b_post, checkpoint46b_pre, release1-branch-end, release1_final_v1, checkpoint46c_pre, checkpoint46, checkpoint47b_post, checkpoint44b_post, checkpoint46h_pre, checkpoint46m_post, checkpoint46a_pre, checkpoint45c_post, ecco_ice2, ecco_ice1, checkpoint44h_post, checkpoint46g_post, release1_p12_pre, ecco_c44_e22, ecco_c44_e25, checkpoint47f_post, chkpt44a_pre, checkpoint46i_post, ecco_c44_e23, ecco_c44_e20, ecco_c44_e21, ecco_c44_e26, ecco_c44_e27, ecco_c44_e24, checkpoint46c_post, ecco-branch-mod1, ecco-branch-mod2, ecco-branch-mod3, ecco-branch-mod4, ecco-branch-mod5, checkpoint46e_post, release1_beta1, checkpoint44b_pre, checkpoint42, checkpoint41, checkpoint47, checkpoint44, checkpoint45, checkpoint48, checkpoint46h_post, chkpt44c_post, checkpoint47h_post, checkpoint44f_pre, checkpoint46d_post, release1-branch_branchpoint
Branch point for: c24_e25_ice, branch-exfmods-curt, release1_final, release1-branch, release1, ecco-branch, release1_50yr, icebear, release1_coupled
Changes since 1.2: +24 -11 lines 
Added comments in form compatible with "protex".
1 adcroft 1.3 C $Header: /u/gcmpack/models/MITgcmUV/pkg/mom_fluxform/mom_u_del2u.F,v 1.2 2001/05/29 14:01:38 adcroft Exp $
2     C $Name: $
3 adcroft 1.2
4     #include "CPP_OPTIONS.h"
5    
6 adcroft 1.3 CBOP
7     C !ROUTINE: MOM_U_DEL2U
8    
9     C !INTERFACE: ==========================================================
10 adcroft 1.2 SUBROUTINE MOM_U_DEL2U(
11     I bi,bj,k,
12     I uFld, hFacZ,
13     O del2u,
14     I myThid)
15 adcroft 1.3
16     C !DESCRIPTION:
17     C Calculates the Laplacian of zonal flow
18    
19     C !USES: ===============================================================
20 adcroft 1.2 IMPLICIT NONE
21     #include "SIZE.h"
22     #include "EEPARAMS.h"
23     #include "PARAMS.h"
24     #include "GRID.h"
25     #include "DYNVARS.h"
26    
27 adcroft 1.3 C !INPUT PARAMETERS: ===================================================
28     C bi,bj :: tile indices
29     C k :: vertical level
30     C uFld :: zonal flow
31     C hFacZ :: fractional thickness at vorticity points
32     C myThid :: thread number
33 adcroft 1.2 INTEGER bi,bj,k
34     _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
35     _RS hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
36 adcroft 1.3 INTEGER myThid
37    
38     C !OUTPUT PARAMETERS: ==================================================
39     C del2u :: Laplacian
40 adcroft 1.2 _RL del2u(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
41    
42 adcroft 1.3 C !LOCAL VARIABLES: ====================================================
43     C i,j :: loop indices
44 adcroft 1.2 INTEGER I,J
45     _RL fZon(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
46     _RL fMer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
47     _RS hFacZClosedS,hFacZClosedN
48 adcroft 1.3 CEOP
49 adcroft 1.2
50     C Zonal flux d/dx U
51     DO j=1-Oly,sNy+Oly
52     DO i=1-Olx,sNx+Olx-1
53     fZon(i,j) = drF(k)*_hFacC(i,j,k,bi,bj)
54     & *_dyF(i,j,bi,bj)
55     & *_recip_dxF(i,j,bi,bj)
56     & *(uFld(i+1,j)-uFld(i,j))
57     #ifdef COSINEMETH_III
58     & *sqcosFacU(J,bi,bj)
59     #endif
60     ENDDO
61     ENDDO
62    
63     C Meridional flux d/dy U
64     DO j=1-Oly+1,sNy+Oly
65     DO i=1-Olx,sNx+Olx
66     fMer(i,j) = drF(k)*hFacZ(i,j)
67     & *_dxV(i,j,bi,bj)
68     & *_recip_dyU(i,j,bi,bj)
69     & *(uFld(i,j)-uFld(i,j-1))
70     ENDDO
71     ENDDO
72    
73     C del^2 U
74     DO j=0,sNy+1
75     DO i=0,sNx+2
76     del2u(i,j) =
77     & recip_drF(k)*_recip_hFacW(i,j,k,bi,bj)
78     & *recip_rAw(i,j,bi,bj)
79     & *( fZon(i,j ) - fZon(i-1,j)
80     & +fMer(i,j+1) - fMer(i ,j)
81     & )*_maskW(i,j,k,bi,bj)
82     ENDDO
83     ENDDO
84    
85     IF (no_slip_sides) THEN
86     C-- No-slip BCs impose a drag at walls...
87     DO j=0,sNy+1
88     DO i=0,sNx+2
89     hFacZClosedS = _hFacW(i,j,k,bi,bj) - hFacZ(i,j)
90     hFacZClosedN = _hFacW(i,j,k,bi,bj) - hFacZ(i,j+1)
91     del2u(i,j) = del2u(i,j)
92     & - _recip_hFacW(i,j,k,bi,bj)*recip_drF(k)
93     & *recip_rAw(i,j,bi,bj)
94     & *( hFacZClosedS*dxV(i, j ,bi,bj)
95     & *_recip_dyU(i, j ,bi,bj)
96     & +hFacZClosedN*dxV(i,j+1,bi,bj)
97     & *_recip_dyU(i,j+1,bi,bj)
98     & )*drF(k)*2.*uFld(i,j)
99     & *_maskW(i,j,k,bi,bj)
100     ENDDO
101     ENDDO
102     ENDIF
103    
104     RETURN
105     END
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