/[MITgcm]/MITgcm/pkg/generic_advdiff/gad_grad_x.F
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Contents of /MITgcm/pkg/generic_advdiff/gad_grad_x.F

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Revision 1.3 - (show annotations) (download)
Fri Sep 21 13:11:43 2001 UTC (22 years, 7 months ago) by adcroft
Branch: MAIN
CVS Tags: checkpoint46n_post, checkpoint51k_post, checkpoint47e_post, checkpoint52l_pre, checkpoint44e_post, hrcube4, hrcube5, checkpoint46l_post, checkpoint46g_pre, checkpoint47c_post, release1_p13_pre, checkpoint50c_post, checkpoint46f_post, checkpoint52d_pre, checkpoint48e_post, checkpoint50c_pre, checkpoint44f_post, checkpoint46b_post, checkpoint52j_pre, checkpoint43a-release1mods, checkpoint51o_pre, checkpoint54d_post, checkpoint54e_post, ecco_c50_e32, ecco_c50_e33, ecco_c50_e30, ecco_c50_e31, release1_p13, checkpoint51l_post, checkpoint48i_post, checkpoint46l_pre, checkpoint52l_post, checkpoint52k_post, chkpt44d_post, checkpoint55, checkpoint54, checkpoint51, checkpoint50, checkpoint53, checkpoint52, release1_p8, release1_p9, checkpoint50d_post, release1_p1, release1_p2, release1_p3, release1_p4, release1_p5, release1_p6, release1_p7, checkpoint52f_post, checkpoint50b_pre, checkpoint44e_pre, checkpoint54f_post, checkpoint51f_post, release1_b1, ecco_c51_e34d, ecco_c51_e34e, ecco_c51_e34f, ecco_c51_e34g, ecco_c51_e34a, ecco_c51_e34b, ecco_c51_e34c, checkpoint48b_post, checkpoint43, checkpoint51d_post, checkpoint48c_pre, checkpoint47d_pre, checkpoint51t_post, checkpoint51n_post, release1_chkpt44d_post, checkpoint52i_pre, hrcube_1, hrcube_2, hrcube_3, checkpoint51s_post, checkpoint47a_post, checkpoint55c_post, checkpoint48d_pre, checkpoint51j_post, checkpoint47i_post, checkpoint52e_pre, release1_p11, checkpoint52e_post, checkpoint51n_pre, checkpoint47d_post, icebear5, icebear4, icebear3, icebear2, checkpoint53d_post, checkpoint46d_pre, checkpoint48d_post, release1-branch_tutorials, checkpoint48f_post, checkpoint45d_post, checkpoint52b_pre, checkpoint54b_post, checkpoint46j_pre, checkpoint51l_pre, checkpoint52m_post, chkpt44a_post, checkpoint44h_pre, checkpoint48h_post, checkpoint51q_post, ecco_c50_e29, checkpoint51b_pre, checkpoint46a_post, checkpoint47g_post, checkpoint52b_post, checkpoint52c_post, checkpoint46j_post, checkpoint51h_pre, checkpoint46k_post, ecco_c50_e28, chkpt44c_pre, checkpoint48a_post, checkpoint45a_post, checkpoint50f_post, checkpoint50a_post, checkpoint50f_pre, checkpoint52f_pre, 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, checkpoint54a_pre, ecco_c50_e33a, checkpoint53c_post, branch-exfmods-tag, checkpoint44g_post, branchpoint-genmake2, checkpoint54a_post, checkpoint46e_pre, checkpoint51r_post, checkpoint48c_post, checkpoint45b_post, checkpoint46b_pre, checkpoint51i_post, release1-branch-end, release1_final_v1, checkpoint55b_post, checkpoint51b_post, checkpoint51c_post, checkpoint46c_pre, checkpoint53a_post, checkpoint46, checkpoint47b_post, checkpoint44b_post, ecco_c51_e34, checkpoint46h_pre, checkpoint52d_post, checkpoint53g_post, checkpoint46m_post, checkpoint46a_pre, checkpoint50g_post, checkpoint45c_post, ecco_ice2, ecco_ice1, checkpoint44h_post, checkpoint46g_post, release1_p12_pre, checkpoint52a_pre, ecco_c44_e22, checkpoint50h_post, checkpoint52i_post, checkpoint50e_pre, checkpoint50i_post, ecco_c44_e25, checkpoint51i_pre, checkpoint52h_pre, checkpoint53f_post, checkpoint52j_post, checkpoint47f_post, checkpoint50e_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, branch-netcdf, checkpoint50d_pre, checkpoint52n_post, checkpoint53b_pre, checkpoint46e_post, release1_beta1, checkpoint51e_post, checkpoint44b_pre, checkpoint42, checkpoint41, checkpoint55a_post, checkpoint47, checkpoint44, checkpoint45, checkpoint48, checkpoint49, checkpoint46h_post, checkpoint51o_post, checkpoint51f_pre, chkpt44c_post, checkpoint48g_post, checkpoint53b_post, checkpoint47h_post, checkpoint52a_post, checkpoint44f_pre, checkpoint51g_post, ecco_c52_e35, checkpoint46d_post, checkpoint50b_post, release1-branch_branchpoint, checkpoint51m_post, checkpoint53d_pre, checkpoint54c_post, checkpoint51a_post, checkpoint51p_post, checkpoint51u_post
Branch point for: c24_e25_ice, branch-exfmods-curt, release1_final, release1-branch, branch-genmake2, release1, branch-nonh, tg2-branch, ecco-branch, release1_50yr, netcdf-sm0, icebear, checkpoint51n_branch, release1_coupled
Changes since 1.2: +4 -2 lines 
Added comments in form compatible with "protex".
1 C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_grad_x.F,v 1.2 2001/09/20 20:07:06 adcroft Exp $
2 C $Name: $
3
4 #include "GAD_OPTIONS.h"
5
6 CBOP
7 C !ROUTINE: GAD_GRAD_X
8
9 C !INTERFACE: ==========================================================
10 SUBROUTINE GAD_GRAD_X(
11 I bi,bj,k,
12 I xA,
13 I tracer,
14 O dTdx,
15 I myThid )
16
17 C !DESCRIPTION:
18 C Calculates the zonal gradient of a tracer: $\partial_x \theta
19 C = \frac{1}{\Delta x_c} \delta_i \theta$
20 C and multiplies by the area.
21
22 C !USES: ===============================================================
23 IMPLICIT NONE
24 #include "SIZE.h"
25 #include "GRID.h"
26
27 C !INPUT PARAMETERS: ===================================================
28 C bi,bj :: tile indices
29 C k :: vertical level
30 C tracer :: tracer field
31 C myThid :: thread number
32 INTEGER bi,bj,k
33 _RS xA (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
34 _RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
35 INTEGER myThid
36
37 C !OUTPUT PARAMETERS: ==================================================
38 C dTdx :: zonal gradient
39 _RL dTdx (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
40
41 C !LOCAL VARIABLES: ====================================================
42 C i,j :: loop indices
43 INTEGER i,j
44 CEOP
45
46 C o Zonal tracer gradient
47 DO j=1-Oly,sNy+Oly
48 dTdx(1-Olx,j)=0.
49 DO i=1-Olx+1,sNx+Olx
50 dTdx(i,j) = _recip_dxC(i,j,bi,bj)*xA(i,j)
51 & *(tracer(i,j)-tracer(i-1,j))
52 #ifdef COSINEMETH_III
53 & *sqCosFacU(j,bi,bj)
54 #endif
55 ENDDO
56 ENDDO
57
58 RETURN
59 END
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