/[MITgcm]/MITgcm/pkg/mom_vecinv/mom_u_bottomdrag.F
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Annotation of /MITgcm/pkg/mom_vecinv/mom_u_bottomdrag.F

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Revision 1.3 - (hide annotations) (download)
Fri Jul 13 13:49:05 2001 UTC (22 years, 10 months ago) by heimbach
Branch: MAIN
CVS Tags: checkpoint46n_post, checkpoint51k_post, checkpoint53f_post, checkpoint47j_post, ecco_c44_e16, checkpoint53b_pre, checkpoint48d_pre, checkpoint44b_post, checkpoint51j_post, branch-exfmods-tag, checkpoint47e_post, checkpoint43a-release1mods, checkpoint44h_pre, release1_p12, checkpoint52l_pre, ecco_c44_e19, checkpoint52e_pre, hrcube4, hrcube5, release1_p10, release1_p11, release1_p16, release1_p17, checkpoint52j_post, release1_p15, ecco_c44_e17, checkpoint47f_post, checkpoint40pre9, checkpoint47c_post, checkpoint50e_post, checkpoint52e_post, checkpoint50c_post, checkpoint46i_post, checkpoint51n_pre, checkpoint47d_post, ecco_c44_e21, ecco_c44_e26, ecco_c44_e27, ecco_c44_e24, ecco_c44_e25, icebear5, icebear4, checkpoint44f_pre, checkpoint47a_post, icebear3, icebear2, checkpoint46f_post, checkpoint52d_pre, ecco_c50_e33a, checkpoint53c_post, checkpoint53d_post, checkpoint41, checkpoint47h_post, checkpoint46d_pre, release1_p13_pre, checkpoint48e_post, checkpoint46e_post, checkpoint48h_post, checkpoint48d_post, checkpoint50c_pre, release1-branch_tutorials, checkpoint46c_post, checkpoint44g_post, branchpoint-genmake2, checkpoint46h_pre, checkpoint44h_post, release1_p12_pre, checkpoint44e_post, checkpoint46k_post, checkpoint52j_pre, ecco-branch-mod1, checkpoint46e_pre, ecco-branch-mod4, ecco-branch-mod5, branch-netcdf, checkpoint50d_pre, checkpoint48f_post, checkpoint45d_post, checkpoint51r_post, checkpoint47i_post, checkpoint52b_pre, checkpoint52n_post, checkpoint51o_pre, checkpoint46j_pre, checkpoint45b_post, checkpoint46b_pre, checkpoint51i_post, checkpoint46j_post, checkpoint48c_post, checkpoint46l_post, chkpt44a_pre, release1-branch-end, release1_final_v1, checkpoint51e_post, checkpoint51b_post, checkpoint46, ecco_c50_e28, ecco_c44_e20, checkpoint51l_pre, checkpoint52m_post, checkpoint51c_post, ecco_c50_e32, ecco_c50_e33, checkpoint53a_post, ecco_c50_e31, checkpoint47d_pre, checkpoint47, checkpoint44, release1_p13, ecco_c44_e18, checkpoint48, checkpoint49, checkpoint44f_post, checkpoint47b_post, checkpoint40pre2, checkpoint40pre5, checkpoint51l_post, checkpoint40pre6, checkpoint48i_post, checkpoint51o_post, checkpoint40pre8, checkpoint46l_pre, checkpoint51f_pre, release1_b1, release1_p14, checkpoint51q_post, checkpoint52l_post, checkpoint52k_post, ecco_c51_e34, chkpt44d_post, ecco_c50_e29, checkpoint42, release1_p9, checkpoint53b_post, checkpoint51, checkpoint50, checkpoint53, checkpoint52, release1_p8, checkpoint50d_post, checkpoint52d_post, checkpoint46g_pre, release1_p2, release1_p3, release1_p4, checkpoint51b_pre, release1_p6, checkpoint52a_post, checkpoint46a_post, checkpoint47g_post, checkpoint52b_post, chkpt44a_post, checkpoint52f_post, checkpoint44b_pre, checkpoint52c_post, release1_p1, checkpoint46m_post, checkpoint48a_post, checkpoint40pre4, checkpoint51h_pre, checkpoint46a_pre, checkpoint40pre3, checkpoint50g_post, checkpoint45c_post, checkpoint50b_pre, release1_p5, checkpoint44e_pre, checkpoint51g_post, ecco_c52_e35, release1_p7, ecco_ice2, ecco_ice1, checkpoint46b_post, checkpoint51f_post, checkpoint46d_post, ecco-branch-mod2, checkpoint48b_post, checkpoint50b_post, checkpoint46g_post, checkpoint45a_post, ecco_c51_e34d, ecco_c51_e34e, ecco_c51_e34f, ecco_c51_e34g, ecco_c51_e34a, ecco_c51_e34b, ecco_c51_e34c, checkpoint50f_post, checkpoint50a_post, checkpoint46c_pre, checkpoint50f_pre, checkpoint52a_pre, ecco-branch-mod3, checkpoint43, checkpoint51d_post, ecco_c50_e30, checkpoint48c_pre, release1-branch_branchpoint, ecco_c44_e22, release1_beta1, ecco_c44_e23, checkpoint51m_post, checkpoint51t_post, checkpoint53d_pre, checkpoint40pre7, checkpoint50h_post, checkpoint52i_post, checkpoint51a_post, checkpoint40, checkpoint45, checkpoint46h_post, checkpoint50e_pre, checkpoint50i_post, checkpoint51p_post, checkpoint51n_post, release1_chkpt44d_post, checkpoint48g_post, checkpoint51i_pre, chkpt44c_pre, checkpoint52i_pre, checkpoint51u_post, checkpoint52h_pre, checkpoint52f_pre, hrcube_1, hrcube_2, hrcube_3, checkpoint51s_post, chkpt44c_post
Branch point for: c24_e25_ice, netcdf-sm0, ecco-branch, branch-genmake2, release1, branch-exfmods-curt, release1_coupled, branch-nonh, icebear, tg2-branch, release1_final, checkpoint51n_branch, release1-branch, release1_50yr
Changes since 1.2: +8 -3 lines 
Adding IF-statement to quadratic bottom drag to prevent
1/sqrt(0) in derivative code.
1 heimbach 1.3 C $Header: /u/gcmpack/models/MITgcmUV/pkg/mom_vecinv/mom_u_bottomdrag.F,v 1.2 2001/05/29 14:01:39 adcroft Exp $
2     C $Name: checkpoint40pre1 $
3 adcroft 1.2
4     #include "CPP_OPTIONS.h"
5    
6     SUBROUTINE MOM_U_BOTTOMDRAG(
7     I bi,bj,k,
8     I uFld, KE, KappaRU,
9     O uDragTerms,
10     I myThid)
11     IMPLICIT NONE
12     C
13     C Calculate bottom drag terms for U eqn
14     C - is not vector invariant ...
15     C
16    
17     C == Global variables ==
18     #include "SIZE.h"
19     #include "EEPARAMS.h"
20     #include "PARAMS.h"
21     #include "GRID.h"
22    
23     C == Routine arguments ==
24     INTEGER bi,bj,k
25     _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
26     _RL KE(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
27     _RL KappaRU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
28     _RL uDragTerms(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
29     _RL viscFac
30     INTEGER myThid
31    
32     C == Local variables ==
33     INTEGER I,J,Kp1
34     _RL rdrckp1,maskDown
35    
36     C- No-slip BCs impose a drag at bottom
37     Kp1=min(k+1,Nr)
38     rdrckp1=recip_drC(kp1)
39     IF (k.EQ.Nr) rdrckp1=recip_drF(k)
40     viscFac=1.
41     IF (.NOT. no_slip_bottom) viscFac=0.
42     DO j=1-Oly,sNy+Oly-1
43     DO i=1-Olx+1,sNx+Olx-1
44     maskDown=_maskW(i,j,kp1,bi,bj)
45     IF (k.EQ.Nr) maskDown=0.
46     uDragTerms(i,j)=
47     & -_recip_hFacW(i,j,k,bi,bj)*recip_drF(k)
48     & *(
49     & 2.*KappaRU(i,j,kp1)*rkFac*rdrckp1*viscFac
50     & + bottomDragLinear
51     & )*(1.-maskDown)*uFld(i,j)
52 heimbach 1.3 IF ( (KE(i,j)+KE(i-1,j)) .NE. 0. ) THEN
53     uDragTerms(i,j)=uDragTerms(i,j)
54     & -_recip_hFacW(i,j,k,bi,bj)*recip_drF(k)
55     & *bottomDragQuadratic*sqrt(KE(i,j)+KE(i-1,j))
56     & *(1.-maskDown)*uFld(i,j)
57     ENDIF
58 adcroft 1.2 ENDDO
59     ENDDO
60    
61     RETURN
62     END
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