/[MITgcm]/MITgcm/pkg/ebm/ebm_wind_perturb.F
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Contents of /MITgcm/pkg/ebm/ebm_wind_perturb.F

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Revision 1.2 - (show annotations) (download)
Fri May 21 21:45:35 2004 UTC (20 years ago) by heimbach
Branch: MAIN
CVS Tags: checkpoint58l_post, checkpoint57t_post, checkpoint57o_post, checkpoint58e_post, checkpoint57v_post, checkpoint53d_post, checkpoint58u_post, checkpoint58w_post, checkpoint54a_pre, checkpoint57m_post, checkpoint55c_post, checkpoint54e_post, checkpoint57s_post, checkpoint54a_post, checkpoint53c_post, checkpoint57k_post, checkpoint55d_pre, checkpoint57d_post, checkpoint57g_post, checkpoint60, checkpoint61, checkpoint57b_post, checkpoint57c_pre, checkpoint58r_post, checkpoint55j_post, checkpoint56b_post, checkpoint57i_post, checkpoint57y_post, checkpoint57e_post, checkpoint55h_post, checkpoint58n_post, checkpoint58x_post, checkpoint57g_pre, checkpoint54b_post, checkpoint55b_post, checkpoint58t_post, checkpoint58h_post, checkpoint54d_post, checkpoint56c_post, checkpoint57y_pre, checkpoint55, checkpoint57f_pre, checkpoint57a_post, checkpoint54, checkpoint58q_post, checkpoint54f_post, checkpoint59q, checkpoint59p, checkpoint55g_post, checkpoint59r, checkpoint58j_post, checkpoint59e, checkpoint59d, checkpoint59g, checkpoint59f, checkpoint59a, checkpoint55f_post, checkpoint59c, checkpoint59b, checkpoint59m, checkpoint59l, checkpoint59o, checkpoint59n, checkpoint59i, checkpoint59h, checkpoint59k, checkpoint59j, checkpoint57r_post, checkpoint59, checkpoint58, checkpoint57a_pre, checkpoint55i_post, checkpoint57, checkpoint56, eckpoint57e_pre, checkpoint57h_done, checkpoint58f_post, checkpoint53g_post, checkpoint57x_post, checkpoint57n_post, checkpoint58d_post, checkpoint58c_post, checkpoint57w_post, checkpoint57p_post, checkpint57u_post, checkpoint57f_post, checkpoint58a_post, checkpoint58i_post, checkpoint57q_post, checkpoint58g_post, checkpoint58o_post, checkpoint57z_post, checkpoint57c_post, checkpoint58y_post, checkpoint55e_post, checkpoint58k_post, checkpoint58v_post, checkpoint53f_post, checkpoint55a_post, checkpoint53d_pre, checkpoint54c_post, checkpoint58s_post, checkpoint61f, checkpoint61g, checkpoint61d, checkpoint61e, checkpoint61b, checkpoint61c, checkpoint58p_post, checkpoint61a, checkpoint61l, checkpoint61j, checkpoint61k, checkpoint61h, checkpoint61i, checkpoint57j_post, checkpoint58b_post, checkpoint57h_pre, checkpoint58m_post, checkpoint57l_post, checkpoint57h_post, checkpoint56a_post, checkpoint55d_post
Changes since 1.1: +12 -6 lines 
o Adjoint for EBM package (needs further testing)
o bug fix for parallel EBM in ebm_zonalmean.F
1 C $Header: /u/gcmpack/MITgcm/pkg/ebm/ebm_wind_perturb.F,v 1.1 2004/05/14 21:10:34 heimbach Exp $
2 C $Name: $
3
4 #include "EBM_OPTIONS.h"
5
6 CStartOfInterface
7 SUBROUTINE EBM_WIND_PERTURB( myTime, myIter, myThid )
8 C |==========================================================|
9 C | S/R EBM_WIND_PERTURB |
10 C | o Calculated random wind perturbations. |
11 C |==========================================================|
12 IMPLICIT NONE
13
14 C == Global data ==
15 #include "SIZE.h"
16 #include "EEPARAMS.h"
17 #include "PARAMS.h"
18 #include "GRID.h"
19 #include "DYNVARS.h"
20 #include "FFIELDS.h"
21 #ifdef ALLOW_EBM
22 # include "EBM.h"
23 #endif
24
25 C == Routine arguments ==
26 _RL myTime
27 INTEGER myIter
28 INTEGER myThid
29 CEndOfInterface
30
31 #ifdef ALLOW_EBM
32 # ifdef EBM_WIND_PERT
33
34 C == Local variables ==
35 C Loop counters
36 INTEGER i, j, bi, bj
37 _RS ya(1-OLy:sNy+OLy), ya2(1-OLy:sNy+OLy)
38 _RS xa(1-OLx:sNx+OLx), xa2(1-OLx:sNx+OLx)
39 _RS y(1-OLy:sNy+OLy), x(1-OLx:sNx+OLx)
40 _RS temp(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
41 _RS temp2(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
42 _RS stdev(1-OLy:sNy+OLy)
43 _RS std(1:40)
44 data std /0.030, 0.035, 0.045, 0.053, 0.059, 0.060, 0.056,
45 & 0.048, 0.041, 0.038, 0.034, 0.029, 0.023, 0.018,
46 & 0.016, 0.015, 0.013, 0.011, 0.008, 0.005, 0.005,
47 & 0.005, 0.008, 0.011, 0.014, 0.014, 0.017, 0.019,
48 & 0.023, 0.029, 0.032, 0.038, 0.048, 0.058, 0.065,
49 & 0.067, 0.063, 0.060, 0.062, 0.064 /
50
51
52 DO bj=myByLo(myThid),myByHi(myThid)
53 DO bi=myBxLo(myThid),myBxHi(myThid)
54
55 DO j = 1-OLy, sNy+OLy
56 y(j) = 0.0
57 ya(j) = 0.0
58 ya2(j) = 0.0
59 stdev(j) = 0.0
60 ENDDO
61 DO i = 1-OLx, sNx+OLx
62 x(i) = 0.0
63 xa(i) = 0.0
64 xa2(i) = 0.0
65 ENDDO
66 DO i = 1-OLx, sNx+OLx
67 DO j = 1-OLy, sNy+OLy
68 temp(i,j) = 0.0
69 temp2(i,j) = 0.0
70 ENDDO
71 ENDDO
72 DO j = 1, sNy
73 stdev(j) = std(j)
74 ENDDO
75
76 cph Generate random numbers
77 cph Need to get this from somewhere!
78 call random_number (temp)
79
80 C interpolation in first dimension
81 C scaling to get a process with a standard deviation of 1
82 DO j = jMin, jMax
83 DO i = iMin, iMax
84 temp(i,j) = 1.73*(2.0*temp(i,j) - 1.0)
85 ENDDO
86 ENDDO
87
88 DO j = jMin, jMax
89 DO i = iMin, iMax
90 x(i) = i
91 xa(i) = x(i) - MOD(x(i),10.0)
92 xa2(i) = xa(i)+10.0
93 if ( xa2(i) .gt. sNx+Olx ) then
94 xa2(i) = 0.0
95 endif
96 temp2(i,j) = 0.1*( (x(i)-xa(i))*temp(INT(xa2(i)),j)+
97 & (10.0-x(i)+xa(i))*temp(INT(xa(i)),j) )
98 ENDDO
99 ENDDO
100
101 C interpolation in second dimension
102 C multiplication with observation zonal wind stress standard deviation
103 C add AR1 process
104 DO i = iMin, iMax
105 DO j = jMin, jMax
106 y(j) = j
107 ya(j) = y(j) - MOD(y(j),6.0)
108 ya2(j) = ya(j)+6.0
109 if ( ya2(j) .gt. sNy+Oly ) then
110 ya2(j) = 0.0
111 endif
112 c time lag correlation coefficient, use 0.75 for temperature timescale,
113 c 0.98 for the momentum timescale.
114 winPert(i,j,bi,bj) = maskW(i,j,k,bi,bj)*
115 & (1.0/1.66)*(0.75*winPert(i,j,bi,bj) +
116 & stdev(j)*(1.0/6.0)*
117 & ((y(j)-ya(j))*temp2(i,INT(ya2(j)))+
118 & (6.0-y(j)+ya(j))*temp2(i,INT(ya(j)))))
119 ENDDO
120 ENDDO
121
122 ENDDO
123 ENDDO
124
125 C CALL PLOT_FIELD_XYRS( winPert, 'winPert',1,myThid)
126
127 _EXCH_XY_R4(winPert , myThid )
128
129 # endif /* EBM_WIND_PERT */
130 #endif /* ALLOW_EBM */
131
132 end
133
134
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