[2] | 1 | ;+ |
---|
| 2 | ;; |
---|
| 3 | ;; Calcul de la fonction d'etat (issue de eos.F) |
---|
| 4 | ;; |
---|
| 5 | ;; Creation : 1997 / G. Roullet |
---|
| 6 | ;; adaptation pour les tableaux z,zt,xyz,xyzt |
---|
| 7 | ;; par seb. |
---|
| 8 | ;; |
---|
| 9 | ;- |
---|
[97] | 10 | FUNCTION rhon, sn, tn, INSITU = insitu, SIGMA_N = sigma_n |
---|
[114] | 11 | ; |
---|
| 12 | compile_opt idl2, strictarrsubs |
---|
| 13 | ; |
---|
[97] | 14 | @common |
---|
| 15 | tempsun = systime(1) ; pour key_performance |
---|
[2] | 16 | sn = -1e5 > double(sn) < 1e5 |
---|
| 17 | tn = -1e5 > double(tn) < 1e5 |
---|
| 18 | |
---|
| 19 | |
---|
| 20 | IF keyword_set(sigma_n) then insitu = 1 |
---|
| 21 | |
---|
| 22 | taille = size(sn) |
---|
| 23 | case taille[0] of |
---|
| 24 | 0:BEGIN ;z |
---|
| 25 | zrhop=0d |
---|
| 26 | jkmax = 1 |
---|
| 27 | END |
---|
| 28 | 1:BEGIN ;z |
---|
| 29 | zrhop=dblarr(taille[1]) |
---|
| 30 | jkmax = taille[1] |
---|
| 31 | END |
---|
| 32 | 2:BEGIN ;xy (jpt=1) ou zt |
---|
| 33 | zrhop=dblarr(taille[1],taille[2]) |
---|
| 34 | if jpt EQ 1 then jkmax = 1 ELSE jkmax = taille[1] |
---|
| 35 | END |
---|
| 36 | 3:BEGIN ;xyz (jpt=1) ou xyt |
---|
| 37 | zrhop=dblarr(taille[1],taille[2],taille[3]) |
---|
| 38 | if jpt EQ 1 then jkmax = taille[3] ELSE jkmax = 1 |
---|
| 39 | END |
---|
| 40 | 4:BEGIN ;xyzt |
---|
| 41 | zrhop=dblarr(taille[1],taille[2],taille[3],taille[4] ) |
---|
| 42 | jkmax = taille[3] |
---|
| 43 | END |
---|
| 44 | endcase |
---|
| 45 | |
---|
| 46 | |
---|
| 47 | |
---|
| 48 | FOR jk = 0, jkmax-1 DO BEGIN |
---|
| 49 | |
---|
| 50 | case taille[0] of |
---|
| 51 | 0:BEGIN ;z |
---|
| 52 | ztt = tn |
---|
| 53 | zs = sn |
---|
| 54 | END |
---|
| 55 | 1:BEGIN ;z |
---|
| 56 | ztt = tn[jk] |
---|
| 57 | zs = sn[jk] |
---|
| 58 | END |
---|
| 59 | 2:BEGIN ;xy (jpt=1) ou zt |
---|
| 60 | if jpt EQ 1 then begin |
---|
| 61 | ztt = tn |
---|
| 62 | zs = sn |
---|
| 63 | ENDIF ELSE BEGIN |
---|
| 64 | ztt = tn[jk, *] |
---|
| 65 | zs = sn[jk, *] |
---|
| 66 | ENDELSE |
---|
| 67 | END |
---|
| 68 | 3:BEGIN ;xyz (jpt=1) ou xyt |
---|
| 69 | if jpt EQ 1 then begin |
---|
| 70 | ztt = tn[*, *, jk] |
---|
| 71 | zs = sn[*, *,jk] |
---|
| 72 | endif ELSE BEGIN |
---|
| 73 | ztt = tn |
---|
| 74 | zs = sn |
---|
| 75 | ENDELSE |
---|
| 76 | END |
---|
| 77 | 4:BEGIN ;xyzt |
---|
| 78 | ztt = tn[*, *, jk, *] |
---|
| 79 | zs = sn[*, *,jk, *] |
---|
| 80 | END |
---|
| 81 | endcase |
---|
[114] | 82 | if n_elements(sigma_n) NE 0 then zh = 1000.*sigma_n ELSE zh = gdept[jk] |
---|
[2] | 83 | ; ... square root salinity |
---|
| 84 | zsr= sqrt(abs(zs)) |
---|
| 85 | ; ... compute density pure water at atm pressure |
---|
| 86 | zr1=((((6.536332e-9*ztt-1.120083e-6)*ztt+1.001685e-4)*ztt-9.095290e-3)*ztt+6.793952e-2)*ztt+999.842594 |
---|
| 87 | ; ... seawater density atm pressure |
---|
| 88 | zr2= (((5.3875e-9*ztt-8.2467e-7)*ztt+7.6438e-5)*ztt-4.0899e-3)*ztt+0.824493 |
---|
| 89 | zr3= (-1.6546e-6*ztt+1.0227e-4)*ztt-5.72466e-3 |
---|
| 90 | zr4= 4.8314e-4 |
---|
| 91 | ; |
---|
| 92 | ; ... potential density (reference to the surface) |
---|
| 93 | case taille[0] of |
---|
| 94 | 0: zrhop = (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
---|
[114] | 95 | 1: zrhop[jk]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
---|
[2] | 96 | 2:BEGIN |
---|
| 97 | if jpt EQ 1 then zrhop = (zr4*zs + zr3*zsr + zr2)*zs + zr1 $ |
---|
[114] | 98 | ELSE zrhop[jk, *]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
---|
[2] | 99 | END |
---|
| 100 | 3:BEGIN |
---|
[114] | 101 | if jpt EQ 1 then zrhop[*, *,jk]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 $ |
---|
[2] | 102 | ELSE zrhop = (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
---|
| 103 | END |
---|
[114] | 104 | 4: zrhop[*, *,jk, *]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
---|
[2] | 105 | endcase |
---|
| 106 | |
---|
| 107 | IF n_elements(insitu) EQ 1 THEN BEGIN |
---|
| 108 | ; ... add the compression terms |
---|
| 109 | ze = (-3.508914e-8*ztt-1.248266e-8)*ztt-2.595994e-6 |
---|
| 110 | zbw= ( 1.296821e-6*ztt-5.782165e-9)*ztt+1.045941e-4 |
---|
| 111 | zb = zbw + ze * zs |
---|
| 112 | ; |
---|
| 113 | zd = -2.042967e-2 |
---|
| 114 | zc = (-7.267926e-5*ztt+2.598241e-3)*ztt+0.1571896 |
---|
| 115 | zaw = ((5.939910e-6*ztt+2.512549e-3)*ztt-0.1028859)*ztt -4.721788 |
---|
| 116 | za = ( zd*zsr + zc)*zs + zaw |
---|
| 117 | ; |
---|
| 118 | zb1= (-0.1909078*ztt+7.390729)*ztt-55.87545 |
---|
| 119 | za1= ((2.326469e-3*ztt+1.553190)*ztt-65.00517)*ztt+1044.077 |
---|
| 120 | zkw= (((-1.361629e-4*ztt-1.852732e-2)*ztt-30.41638)*ztt+2098.925)*ztt+190925.6 |
---|
| 121 | zk0= (zb1*zsr + za1)*zs + zkw |
---|
| 122 | ; |
---|
| 123 | ; ... masked in situ density |
---|
| 124 | case taille[0] of |
---|
| 125 | 0: zrhop = zrhop / (1.0-zh/(zk0-zh*(za-zh*zb))) |
---|
[114] | 126 | 1: zrhop[jk] = zrhop[jk] / (1.0-zh/(zk0-zh*(za-zh*zb))) |
---|
[2] | 127 | 2:BEGIN |
---|
| 128 | if jpt EQ 1 then zrhop = zrhop / (1.0-zh/(zk0-zh*(za-zh*zb))) $ |
---|
[114] | 129 | ELSE zrhop[jk, *] = zrhop[jk, *] / (1.0-zh/(zk0-zh*(za-zh*zb))) |
---|
[2] | 130 | END |
---|
| 131 | 3:BEGIN |
---|
[114] | 132 | if jpt EQ 1 then zrhop[*, *,jk] = zrhop[*, *,jk] / (1.0-zh/(zk0-zh*(za-zh*zb))) $ |
---|
[2] | 133 | ELSE zrhop = zrhop / (1.0-zh/(zk0-zh*(za-zh*zb))) |
---|
| 134 | END |
---|
[114] | 135 | 4: zrhop[*, *,jk, *] = zrhop[*, *,jk, *] / (1.0-zh/(zk0-zh*(za-zh*zb))) |
---|
[2] | 136 | endcase |
---|
| 137 | |
---|
| 138 | ENDIF |
---|
| 139 | ENDFOR |
---|
| 140 | |
---|
| 141 | terre = where(tn GE 1e6) |
---|
| 142 | if terre[0] NE -1 then zrhop[terre] = valmask |
---|
| 143 | |
---|
| 144 | if keyword_set(key_performance) THEN print, 'temps rhon', systime(1)-tempsun |
---|
| 145 | |
---|
| 146 | |
---|
| 147 | return, zrhop |
---|
| 148 | END |
---|
| 149 | |
---|
| 150 | |
---|