| 1 | ;------------------------------------------------------------ |
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| 2 | ;------------------------------------------------------------ |
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| 3 | ;------------------------------------------------------------ |
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| 4 | ; |
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| 5 | ; NAME: northwind.pro |
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| 6 | ; |
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| 7 | ; PURPOSE: Check on in the intput field the level of coherence of winds nearby north pole, |
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| 8 | ; and corrects it. Thi stask is performed before interpolation |
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| 9 | ; |
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| 10 | ; CATEGORY: Subroutine |
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| 11 | ; |
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| 12 | ; CALLING SEQUENCE: northwind |
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| 13 | ; |
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| 14 | ; INPUTS: |
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| 15 | ; |
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| 16 | ; |
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| 17 | ; KEYWORD PARAMETERS: None |
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| 18 | ; |
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| 19 | ; OUTPUTS: |
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| 20 | ; zresul : the same wind field with its upward stripe |
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| 21 | ; corrected in order to get coherence of winds on north polte |
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| 22 | ; |
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| 23 | ; COMMON BLOCKS: |
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| 24 | ; common_interp.pro |
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| 25 | ; |
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| 26 | ; SIDE EFFECTS: |
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| 27 | ; |
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| 28 | ; RESTRICTIONS: |
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| 29 | ; |
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| 30 | ; EXAMPLE: |
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| 31 | ; |
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| 32 | ; MODIFICATION HISTORY: |
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| 33 | ; |
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| 34 | ;------------------------------------------------------------ |
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| 35 | ;------------------------------------------------------------ |
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| 36 | |
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| 37 | |
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| 38 | pro northwind, datglo,zdata_name,t |
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| 39 | |
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| 40 | @common_interp |
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| 41 | |
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| 42 | ; Treatment of north pole stripe |
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| 43 | |
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| 44 | |
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| 45 | ; Get from global array, the last stripe and the last but one stripe |
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| 46 | |
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| 47 | ; Initialising data arrays |
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| 48 | |
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| 49 | datglo_rect = replicate(0.,2,jpiatm) |
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| 50 | datglo_rectb = replicate(0.,2,jpiatm) |
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| 51 | |
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| 52 | ; Put data of the last two stripes into arrays |
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| 53 | |
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| 54 | |
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| 55 | datglo_rect(0,*) = datglo(*,jpjatm-1,0) |
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| 56 | datglo_rect(1,*) = datglo(*,jpjatm-1,1) |
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| 57 | |
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| 58 | datglo_rectb(0,*)= datglo(*,jpjatm-2,0) |
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| 59 | datglo_rectb(1,*)= datglo(*,jpjatm-2,1) |
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| 60 | |
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| 61 | |
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| 62 | |
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| 63 | ; Converts data of these two lines into polar coordinates |
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| 64 | |
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| 65 | add_angle=0. |
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| 66 | |
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| 67 | if (zdata_name EQ data_u_name) then add_angle=!PI/2 |
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| 68 | |
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| 69 | |
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| 70 | datglo_polar=CV_COORD(FROM_RECT=datglo_rect,/TO_POLAR) |
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| 71 | datglo_polar(0,*)=datglo_polar(0,*)+2*!PI*indgen(jpiatm)/jpiatm |
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| 72 | |
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| 73 | datglo_polarb=CV_COORD(FROM_RECT=datglo_rect,/TO_POLAR) |
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| 74 | datglo_polarb(0,*)=datglo_polar(0,*)+2*!PI*indgen(jpiatm)/jpiatm |
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| 75 | |
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| 76 | |
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| 77 | ; Coherence of the last line needs to be corrected |
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| 78 | |
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| 79 | print, 'CHECKING LAST LINE COHERENCE...' |
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| 80 | |
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| 81 | mean_mod=replicate(total(datglo_polar(1,*))/jpiatm,jpiatm) |
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| 82 | mean_arg=replicate((total(datglo_polar(0,*))/jpiatm+2*!PI*west_lon/360.+!PI*(jpiatm-1.)/float(jpiatm)) ,jpiatm) |
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| 83 | mean_argb=replicate((total(datglo_polarb(0,*))/jpiatm+2*!PI*west_lon/360.+!PI*(jpiatm-1.)/float(jpiatm)) ,jpiatm) |
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| 84 | |
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| 85 | |
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| 86 | |
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| 87 | ; Checks whether module is about the same on the North Pole line : |
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| 88 | |
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| 89 | test_mod=abs(mean_mod-datglo_polar(1,*)) |
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| 90 | |
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| 91 | IF ( max(test_mod)/mean_mod(0) ) GT 0.01 THEN BEGIN |
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| 92 | |
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| 93 | print, 'MODULE IS NOT COHERENT AND WILL BE CORRECTED TO A MEAN VALUE OF :', mean_mod(0) |
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| 94 | |
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| 95 | datglo_polar(1,*)=mean_mod |
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| 96 | |
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| 97 | ENDIF |
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| 98 | |
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| 99 | |
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| 100 | ; Checks whether argument is coherent on the North Pole line : |
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| 101 | |
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| 102 | test_arg=abs(mean_arg-datglo_polar(0,*)) |
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| 103 | |
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| 104 | IF ( max(test_arg)/mean_arg(0)) GT 0.01 THEN BEGIN |
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| 105 | |
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| 106 | print, 'ARGUMENT IS NOT COHERENT AND WILL BE CORRECTED TO A MEAN VALUE :', mean_argb(0) |
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| 107 | |
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| 108 | datglo_polar(0,*)=mean_argb-!PI/2-(2*!PI*indgen(jpiatm)/float(jpiatm)+replicate(2.*!PI*west_lon/360.,jpiatm)) |
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| 109 | |
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| 110 | |
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| 111 | |
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| 112 | ; Cross Corellation Method for wind coherence on North Pole |
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| 113 | |
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| 114 | all_phases=indgen(jpiatm) |
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| 115 | |
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| 116 | Ux=mean_mod*cos(all_phases*2.*!PI/jpiatm) |
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| 117 | Uy=mean_mod*sin(all_phases*2.*!PI/jpiatm) |
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| 118 | |
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| 119 | phyx=C_CORRELATE(Ux,datglo(*,jpjatm-2,0),all_phases) |
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| 120 | |
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| 121 | phyy=C_CORRELATE(Uy,datglo(*,jpjatm-2,1),all_phases) |
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| 122 | |
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| 123 | |
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| 124 | deph_x=where(phyx EQ max(phyx)) |
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| 125 | deph_y=where(phyy EQ max(phyy)) |
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| 126 | |
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| 127 | deph_x=deph_x(0) |
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| 128 | deph_y=deph_y(0) |
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| 129 | |
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| 130 | |
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| 131 | |
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| 132 | |
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| 133 | Ux=shift(Ux,deph_x) |
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| 134 | Uy=shift(Uy,deph_y) |
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| 135 | |
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| 136 | datglo(*,jpjatm-1,0)=Ux |
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| 137 | datglo(*,jpjatm-1,1)=Uy |
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| 138 | |
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| 139 | |
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| 140 | ENDIF |
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| 141 | |
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| 142 | |
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| 143 | |
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| 144 | |
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| 145 | end |
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