/[MITgcm]/MITgcm/model/src/adams_bashforth2.F
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Contents of /MITgcm/model/src/adams_bashforth2.F

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Revision 1.2 - (show annotations) (download)
Wed Sep 26 18:09:13 2001 UTC (22 years, 7 months ago) by cnh
Branch: MAIN
CVS Tags: checkpoint46n_post, checkpoint51k_post, checkpoint47e_post, checkpoint44e_post, checkpoint46l_post, checkpoint46g_pre, checkpoint47c_post, release1_p13_pre, checkpoint50c_post, checkpoint46f_post, checkpoint48e_post, checkpoint50c_pre, checkpoint44f_post, checkpoint46b_post, checkpoint43a-release1mods, checkpoint51o_pre, ecco_c50_e32, ecco_c50_e33, ecco_c50_e30, ecco_c50_e31, release1_p13, checkpoint51l_post, checkpoint48i_post, checkpoint46l_pre, chkpt44d_post, checkpoint51, checkpoint50, release1_p8, release1_p9, checkpoint50d_post, release1_p1, release1_p2, release1_p3, release1_p4, release1_p5, release1_p6, release1_p7, checkpoint50b_pre, checkpoint44e_pre, 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, checkpoint51n_post, release1_chkpt44d_post, checkpoint47a_post, checkpoint48d_pre, checkpoint51j_post, checkpoint47i_post, release1_p11, checkpoint51n_pre, checkpoint47d_post, icebear5, icebear4, icebear3, icebear2, checkpoint46d_pre, checkpoint48d_post, release1-branch_tutorials, checkpoint48f_post, checkpoint45d_post, checkpoint46j_pre, checkpoint51l_pre, chkpt44a_post, checkpoint44h_pre, checkpoint48h_post, checkpoint51q_post, ecco_c50_e29, checkpoint51b_pre, checkpoint46a_post, checkpoint47g_post, checkpoint46j_post, checkpoint51h_pre, checkpoint46k_post, ecco_c50_e28, chkpt44c_pre, checkpoint48a_post, checkpoint45a_post, checkpoint50f_post, checkpoint50a_post, checkpoint50f_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, ecco_c50_e33a, branch-exfmods-tag, checkpoint44g_post, branchpoint-genmake2, checkpoint46e_pre, checkpoint48c_post, checkpoint45b_post, checkpoint46b_pre, checkpoint51i_post, release1-branch-end, release1_final_v1, checkpoint51b_post, checkpoint51c_post, checkpoint46c_pre, checkpoint46, checkpoint47b_post, checkpoint44b_post, ecco_c51_e34, checkpoint46h_pre, checkpoint46m_post, checkpoint46a_pre, checkpoint50g_post, checkpoint45c_post, ecco_ice2, ecco_ice1, checkpoint44h_post, checkpoint46g_post, release1_p12_pre, ecco_c44_e22, checkpoint50h_post, checkpoint50e_pre, checkpoint50i_post, ecco_c44_e25, checkpoint51i_pre, 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, checkpoint50d_pre, checkpoint46e_post, release1_beta1, checkpoint51e_post, checkpoint44b_pre, checkpoint42, checkpoint41, checkpoint47, checkpoint44, checkpoint45, checkpoint48, checkpoint49, checkpoint46h_post, checkpoint51o_post, checkpoint51f_pre, chkpt44c_post, checkpoint48g_post, checkpoint47h_post, checkpoint44f_pre, checkpoint51g_post, checkpoint46d_post, checkpoint50b_post, release1-branch_branchpoint, checkpoint51m_post, checkpoint51a_post, checkpoint51p_post
Branch point for: c24_e25_ice, branch-exfmods-curt, release1_final, release1-branch, branch-genmake2, release1, tg2-branch, ecco-branch, release1_50yr, icebear, checkpoint51n_branch, release1_coupled
Changes since 1.1: +26 -9 lines 
Bringing comments up to data and formatting for document extraction.
1 C $Header: /u/gcmpack/models/MITgcmUV/model/src/adams_bashforth2.F,v 1.1 2001/09/19 02:43:27 adcroft Exp $
2 C $Name: $
3
4 #include "CPP_OPTIONS.h"
5
6 CBOP
7 C !ROUTINE: ADAMS_BASHFORTH2
8 C !INTERFACE:
9 SUBROUTINE ADAMS_BASHFORTH2(
10 I bi, bj, K,
11 U gTracer, gTrNm1,
12 I myIter, myThid )
13 C !DESCRIPTION: \bv
14 C *==========================================================*
15 C | S/R ADAMS_BASHFORTH2
16 C | o Extrapolate tendancies forward in time using
17 C | quasi-second order Adams-Bashforth method.
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 "GAD.h"
28 #include "GRID.h"
29 #include "SURFACE.h"
30
31 C !INPUT/OUTPUT PARAMETERS:
32 C == Routine Arguments ==
33 C bi,bj,K :: Tile and level indices
34 C gTracer :: Tendency at current time ( generally units of quantity/sec )
35 C gTrNm1 :: Tendency at previous time ( generally units of quantity/sec )
36 C myIter :: Current time step number
37 C myThid :: Thread number of this thread
38 INTEGER bi,bj,K
39 _RL gTracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
40 _RL gTrNm1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
41 INTEGER myIter, myThid
42
43 C !LOCAL VARIABLES:
44 C == Local variables ==
45 C i,j :: Loop counters
46 C ab15, ab05 :: Adams bashforth extrapolation weights.
47 INTEGER i,j
48 _RL ab15,ab05
49 _RL gTrtmp
50 CEOP
51
52 C Adams-Bashforth timestepping weights
53 IF (myIter .EQ. 0) THEN
54 ab15=1.0
55 ab05=0.0
56 ELSE
57 ab15=1.5+abEps
58 ab05=-(0.5+abEps)
59 ENDIF
60
61 C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----
62
63 C- Compute effective G-term with Adams-Bashforth weights:
64 DO j=1-Oly,sNy+Oly
65 DO i=1-Olx,sNx+Olx
66 gTrtmp = ab15*gTracer(i,j,k,bi,bj)
67 & + ab05*gTrNm1(i,j,k,bi,bj)
68 gTrNm1(i,j,k,bi,bj) = gTracer(i,j,k,bi,bj)
69 gTracer(i,j,k,bi,bj) = gTrtmp
70 ENDDO
71 ENDDO
72
73 RETURN
74 END
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