[416] | 1 | SUBROUTINE stdlevvar(klon, knon, nsrf, zxli, & |
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| 2 | u1, v1, t1, q1, z1, & |
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| 3 | ts1, qsurf, rugos, psol, pat1, & |
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| 4 | t_2m, q_2m, u_10m) |
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| 5 | USE coefcdrag_int |
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| 6 | USE screenpc_int |
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| 7 | IMPLICIT NONE |
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| 8 | !------------------------------------------------------------------------- |
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| 9 | ! |
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| 10 | ! Objet : calcul de la temperature et l'humidite relative a 2m et du |
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| 11 | ! module du vent a 10m a partir des relations de Dyer-Businger et |
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| 12 | ! des equations de Louis. |
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| 13 | ! |
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| 14 | ! Reference : Hess, Colman et McAvaney (1995) |
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| 15 | ! |
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| 16 | ! I. Musat, 01.07.2002 |
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| 17 | !------------------------------------------------------------------------- |
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| 18 | ! |
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| 19 | ! klon----input-I- dimension de la grille physique (= nb_pts_latitude X nb_pts_longitude) |
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| 20 | ! knon----input-I- nombre de points pour un type de surface |
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| 21 | ! nsrf----input-I- indice pour le type de surface; voir indicesol.inc |
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| 22 | ! zxli----input-L- TRUE si calcul des cdrags selon Laurent Li |
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| 23 | ! u1------input-R- vent zonal au 1er niveau du modele |
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| 24 | ! v1------input-R- vent meridien au 1er niveau du modele |
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| 25 | ! t1------input-R- temperature de l'air au 1er niveau du modele |
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| 26 | ! q1------input-R- humidite relative au 1er niveau du modele |
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| 27 | ! z1------input-R- geopotentiel au 1er niveau du modele |
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| 28 | ! ts1-----input-R- temperature de l'air a la surface |
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| 29 | ! qsurf---input-R- humidite relative a la surface |
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| 30 | ! rugos---input-R- rugosite |
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| 31 | ! psol----input-R- pression au sol |
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| 32 | ! pat1----input-R- pression au 1er niveau du modele |
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| 33 | ! |
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| 34 | ! t_2m---output-R- temperature de l'air a 2m |
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| 35 | ! q_2m---output-R- humidite relative a 2m |
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| 36 | ! u_10m--output-R- vitesse du vent a 10m |
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| 37 | ! |
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| 38 | INTEGER, intent(in) :: klon, knon, nsrf |
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| 39 | LOGICAL, intent(in) :: zxli |
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| 40 | REAL, dimension(klon), intent(in) :: u1, v1, t1, q1, z1, ts1 |
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| 41 | REAL, dimension(klon), intent(in) :: qsurf, rugos |
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| 42 | REAL, dimension(klon), intent(in) :: psol, pat1 |
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| 43 | ! |
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| 44 | REAL, dimension(klon), intent(out) :: t_2m, q_2m, u_10m |
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| 45 | !------------------------------------------------------------------------- |
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| 46 | #include "YOMCST.inc" |
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| 47 | !IM PLUS |
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| 48 | #include "YOETHF.inc" |
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| 49 | ! |
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| 50 | ! Quelques constantes et options: |
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| 51 | ! |
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| 52 | ! RKAR : constante de von Karman |
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| 53 | REAL, PARAMETER :: RKAR=0.40 |
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| 54 | ! niter : nombre iterations calcul "corrector" |
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| 55 | INTEGER, parameter :: niter=6, ncon=niter-1 |
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| 56 | ! |
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| 57 | ! Variables locales |
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| 58 | INTEGER :: i, n |
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| 59 | REAL :: zref |
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| 60 | REAL, dimension(klon) :: speed |
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| 61 | ! tpot : temperature potentielle |
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| 62 | REAL, dimension(klon) :: tpot |
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| 63 | REAL, dimension(klon) :: zri1, cdran |
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| 64 | REAL, dimension(klon) :: cdram, cdrah |
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| 65 | ! ri1 : nb. de Richardson entre la surface --> la 1ere couche |
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| 66 | REAL, dimension(klon) :: ri1 |
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| 67 | REAL, dimension(klon) :: ustar, testar, qstar |
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| 68 | REAL, dimension(klon) :: zdte, zdq |
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| 69 | ! lmon : longueur de Monin-Obukhov selon Hess, Colman and McAvaney |
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| 70 | DOUBLE PRECISION, dimension(klon) :: lmon |
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| 71 | DOUBLE PRECISION, parameter :: eps=1.0D-20 |
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| 72 | REAL, dimension(klon) :: delu, delte, delq |
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| 73 | REAL, dimension(klon) :: u_zref, te_zref, q_zref |
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| 74 | REAL, dimension(klon) :: temp, pref |
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| 75 | LOGICAL :: okri |
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| 76 | REAL, dimension(klon) :: u_zref_p, te_zref_p, temp_p, q_zref_p |
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| 77 | REAL, dimension(klon) :: u_zref_c, te_zref_c, temp_c, q_zref_c |
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| 78 | REAL, dimension(klon) :: ok_pred, ok_corr |
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| 79 | REAL, dimension(klon) :: conv_te, conv_q |
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| 80 | !------------------------------------------------------------------------- |
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| 81 | DO i=1, knon |
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| 82 | speed(i)=SQRT(u1(i)**2+v1(i)**2) |
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| 83 | ri1(i) = 0.0 |
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| 84 | ENDDO |
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| 85 | ! |
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| 86 | okri=.FALSE. |
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| 87 | CALL coefcdrag(klon, knon, nsrf, zxli, & |
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| 88 | speed, t1, q1, z1, psol, & |
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| 89 | ts1, qsurf, rugos, okri, ri1, & |
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| 90 | cdram, cdrah, cdran, zri1, pref) |
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| 91 | ! |
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| 92 | !---------Star variables---------------------------------------------------- |
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| 93 | ! |
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| 94 | DO i = 1, knon |
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| 95 | ri1(i) = zri1(i) |
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| 96 | tpot(i) = t1(i)* (psol(i)/pat1(i))**RKAPPA |
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| 97 | ustar(i) = sqrt(cdram(i) * speed(i) * speed(i)) |
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| 98 | zdte(i) = tpot(i) - ts1(i) |
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| 99 | zdq(i) = max(q1(i),0.0) - max(qsurf(i),0.0) |
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| 100 | ! |
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| 101 | testar(i) = (cdrah(i) * zdte(i) * speed(i))/ustar(i) |
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| 102 | qstar(i) = (cdrah(i) * zdq(i) * speed(i))/ustar(i) |
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| 103 | lmon(i) = (ustar(i) * ustar(i) * tpot(i))/ & |
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| 104 | (RKAR * RG * testar(i)) |
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| 105 | ENDDO |
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| 106 | ! |
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| 107 | !----------First aproximation of variables at zref -------------------------- |
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| 108 | zref = 2.0 |
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| 109 | CALL screenp(klon, knon, nsrf, speed, tpot, q1, & |
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| 110 | ts1, qsurf, rugos, lmon, & |
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| 111 | ustar, testar, qstar, zref, & |
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| 112 | delu, delte, delq) |
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| 113 | ! |
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| 114 | DO i = 1, knon |
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| 115 | u_zref(i) = delu(i) |
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| 116 | q_zref(i) = max(qsurf(i),0.0) + delq(i) |
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| 117 | te_zref(i) = ts1(i) + delte(i) |
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| 118 | temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
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| 119 | ! q_zref_p(i) = q_zref(i) |
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| 120 | ! te_zref_p(i) = te_zref(i) |
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| 121 | temp_p(i) = temp(i) |
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| 122 | ENDDO |
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| 123 | ! |
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| 124 | ! Iteration of the variables at the reference level zref : corrector calculation ; see Hess & McAvaney, 1995 |
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| 125 | ! |
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| 126 | DO n = 1, niter |
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| 127 | ! |
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| 128 | okri=.TRUE. |
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| 129 | CALL screenc(klon, knon, nsrf, zxli, & |
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| 130 | u_zref, temp, q_zref, zref, & |
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| 131 | ts1, qsurf, rugos, psol, & |
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| 132 | ustar, testar, qstar, okri, ri1, & |
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| 133 | pref, delu, delte, delq) |
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| 134 | ! |
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| 135 | DO i = 1, knon |
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| 136 | u_zref(i) = delu(i) |
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| 137 | q_zref(i) = delq(i) + max(qsurf(i),0.0) |
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| 138 | te_zref(i) = delte(i) + ts1(i) |
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| 139 | ! |
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| 140 | ! return to normal temperature |
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| 141 | ! |
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| 142 | temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
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| 143 | ! temp(i) = te_zref(i) - (zref* RG)/RCPD/ & |
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| 144 | ! (1 + RVTMP2 * max(q_zref(i),0.0)) |
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| 145 | ! |
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| 146 | IF(temp(i).GT.350.) THEN |
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| 147 | WRITE(*,*) 'temp(i) GT 350 K !!',i,nsrf,temp(i) |
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| 148 | ENDIF |
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| 149 | ! |
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| 150 | IF(n.EQ.ncon) THEN |
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| 151 | te_zref_p(i) = te_zref(i) |
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| 152 | q_zref_p(i) = q_zref(i) |
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| 153 | ENDIF |
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| 154 | ! |
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| 155 | ENDDO |
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| 156 | ! |
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| 157 | ENDDO |
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| 158 | ! |
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| 159 | ! verifier le critere de convergence : 0.25% pour te_zref et 5% pour qe_zref |
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| 160 | ! |
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| 161 | DO i = 1, knon |
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| 162 | conv_te(i) = (te_zref(i) - te_zref_p(i))/te_zref_p(i) |
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| 163 | conv_q(i) = (q_zref(i) - q_zref_p(i))/q_zref_p(i) |
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| 164 | IF(abs(conv_te(i)).GE.0.0025.AND.abs(conv_q(i)).GE.0.05) THEN |
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| 165 | PRINT*,'DIV','i=',i,te_zref_p(i),te_zref(i),conv_te(i), & |
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| 166 | q_zref_p(i),q_zref(i),conv_q(i) |
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| 167 | ENDIF |
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| 168 | ENDDO |
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| 169 | ! |
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| 170 | DO i = 1, knon |
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| 171 | q_zref_c(i) = q_zref(i) |
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| 172 | temp_c(i) = temp(i) |
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| 173 | ! |
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| 174 | IF(zri1(i).LT.0.) THEN |
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| 175 | IF(nsrf.EQ.1) THEN |
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| 176 | ok_pred(i)=1. |
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| 177 | ok_corr(i)=0. |
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| 178 | ELSE |
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| 179 | ok_pred(i)=0. |
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| 180 | ok_corr(i)=1. |
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| 181 | ENDIF |
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| 182 | ELSE |
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| 183 | ok_pred(i)=0. |
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| 184 | ok_corr(i)=1. |
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| 185 | ENDIF |
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| 186 | ! |
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| 187 | t_2m(i) = temp_p(i) * ok_pred(i) + temp_c(i) * ok_corr(i) |
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| 188 | q_2m(i) = q_zref_p(i) * ok_pred(i) + q_zref_c(i) * ok_corr(i) |
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| 189 | ENDDO |
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| 190 | ! |
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| 191 | ! |
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| 192 | !----------First aproximation of variables at zref -------------------------- |
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| 193 | ! |
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| 194 | zref = 10.0 |
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| 195 | CALL screenp(klon, knon, nsrf, speed, tpot, q1, & |
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| 196 | ts1, qsurf, rugos, lmon, & |
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| 197 | ustar, testar, qstar, zref, & |
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| 198 | delu, delte, delq) |
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| 199 | ! |
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| 200 | DO i = 1, knon |
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| 201 | u_zref(i) = delu(i) |
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| 202 | q_zref(i) = max(qsurf(i),0.0) + delq(i) |
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| 203 | te_zref(i) = ts1(i) + delte(i) |
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| 204 | temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
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| 205 | ! temp(i) = te_zref(i) - (zref* RG)/RCPD/ & |
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| 206 | ! (1 + RVTMP2 * max(q_zref(i),0.0)) |
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| 207 | u_zref_p(i) = u_zref(i) |
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| 208 | ENDDO |
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| 209 | ! |
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| 210 | ! Iteration of the variables at the reference level zref : corrector ; see Hess & McAvaney, 1995 |
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| 211 | ! |
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| 212 | DO n = 1, niter |
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| 213 | ! |
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| 214 | okri=.TRUE. |
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| 215 | CALL screenc(klon, knon, nsrf, zxli, & |
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| 216 | u_zref, temp, q_zref, zref, & |
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| 217 | ts1, qsurf, rugos, psol, & |
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| 218 | ustar, testar, qstar, okri, ri1, & |
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| 219 | pref, delu, delte, delq) |
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| 220 | ! |
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| 221 | DO i = 1, knon |
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| 222 | u_zref(i) = delu(i) |
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| 223 | q_zref(i) = delq(i) + max(qsurf(i),0.0) |
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| 224 | te_zref(i) = delte(i) + ts1(i) |
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| 225 | temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
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| 226 | ! temp(i) = te_zref(i) - (zref* RG)/RCPD/ & |
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| 227 | ! (1 + RVTMP2 * max(q_zref(i),0.0)) |
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| 228 | ENDDO |
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| 229 | ! |
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| 230 | ENDDO |
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| 231 | ! |
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| 232 | DO i = 1, knon |
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| 233 | u_zref_c(i) = u_zref(i) |
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| 234 | ! |
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| 235 | u_10m(i) = u_zref_p(i) * ok_pred(i) + u_zref_c(i) * ok_corr(i) |
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| 236 | ENDDO |
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| 237 | ! |
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| 238 | RETURN |
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| 239 | END subroutine stdlevvar |
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