| 1 | ! |
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| 2 | ! $Id: inidissip.F90 1502 2011-03-21 16:07:54Z jghattas $ |
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| 3 | ! |
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| 4 | SUBROUTINE inidissip ( lstardis,nitergdiv,nitergrot,niterh , & |
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| 5 | tetagdiv,tetagrot,tetatemp, vert_prof_dissip) |
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| 6 | !======================================================================= |
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| 7 | ! Initialization for horizontal (lateral) dissipation |
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| 8 | ! - in all cases, there is a multiplicative coefficient which increases |
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| 9 | ! the dissipation in the higher levels of the atmosphere, but there |
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| 10 | ! are different ways of seting the vertical profile of this coefficient |
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| 11 | ! (see code below). |
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| 12 | ! - the call to dissipation, every 'dissip_period' dynamical time step, |
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| 13 | ! can be imposed via 'dissip_period=...' in run.def (or via the |
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| 14 | ! 'idissip=...' flag, but this flag should become obsolete, and is |
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| 15 | ! overridden by the 'dissip_period' flag). Note that setting |
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| 16 | ! dissip_period=0 has the special meaning of requesting an "optimal" |
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| 17 | ! value for "dissip_period" (then taken as the largest possible value) |
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| 18 | ! - the three characteristic time scales (relative to the smallest |
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| 19 | ! longitudinal grid mesh size), which are privided in run.def, which |
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| 20 | ! are used for the dissipations steps are: |
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| 21 | ! tetagdiv : time scale for the gradient of the divergence of velocities |
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| 22 | ! tetagrot : time scale for the curl of the curl of velocities |
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| 23 | ! tetatemp : time scale for the laplacian of the potential temperature |
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| 24 | !======================================================================= |
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| 25 | |
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| 26 | USE control_mod, only : dissip_period,iperiod,planet_type |
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| 27 | USE comvert_mod, ONLY: preff,presnivs,scaleheight,pseudoalt |
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| 28 | USE comconst_mod, ONLY: dtvr,dtdiss,rad,pi,dissip_zref,dissip_deltaz, & |
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| 29 | dissip_factz,dissip_fac_mid,dissip_fac_up,dissip_pupstart, & |
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| 30 | dissip_hdelta |
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| 31 | USE logic_mod, ONLY: ok_strato |
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| 32 | |
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| 33 | IMPLICIT NONE |
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| 34 | include "dimensions.h" |
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| 35 | include "paramet.h" |
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| 36 | include "comdissipn.h" |
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| 37 | include "iniprint.h" |
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| 38 | |
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| 39 | LOGICAL,INTENT(in) :: lstardis |
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| 40 | INTEGER,INTENT(in) :: nitergdiv,nitergrot,niterh |
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| 41 | REAL,INTENT(in) :: tetagdiv,tetagrot,tetatemp |
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| 42 | |
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| 43 | integer, INTENT(in):: vert_prof_dissip ! Vertical profile of horizontal dissipation |
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| 44 | ! For the Earth model: |
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| 45 | ! Allowed values: |
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| 46 | ! 0: rational fraction, function of pressure |
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| 47 | ! 1: tanh of altitude |
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| 48 | ! For planets: |
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| 49 | ! 0: use fac_mid (read from run.def) |
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| 50 | ! 1: use fac_mid, fac_up, startalt, delta (hard coded in inidissip.F90) |
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| 51 | ! Local variables: |
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| 52 | REAL fact,zvert(llm),zz |
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| 53 | REAL zh(ip1jmp1),zu(ip1jmp1), gx(ip1jmp1), divgra(ip1jmp1) |
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| 54 | real zv(ip1jm), gy(ip1jm), deltap(ip1jmp1,llm) |
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| 55 | REAL ullm,vllm,umin,vmin,zhmin,zhmax |
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| 56 | REAL zllm |
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| 57 | |
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| 58 | INTEGER l,ij,idum,ii |
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| 59 | REAL tetamin |
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| 60 | REAL pseudoz |
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| 61 | REAL Pup |
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| 62 | character (len=80) :: abort_message |
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| 63 | |
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| 64 | REAL ran1 |
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| 65 | logical,save :: firstcall=.true. |
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| 66 | real,save :: fac_mid,fac_up,startalt,delta,middle |
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| 67 | |
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| 68 | if (firstcall) then |
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| 69 | firstcall=.false. |
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| 70 | if ((planet_type.ne."earth").and.(vert_prof_dissip.eq.1)) then |
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| 71 | ! initialize values for dissipation variation along the vertical (Mars) |
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| 72 | fac_mid=3 ! coefficient for lower/middle atmosphere |
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| 73 | fac_up=30 ! coefficient for upper atmosphere |
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| 74 | startalt=70. ! altitude (in km) for the transition from middle to upper atm. |
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| 75 | delta=30.! Size (in km) of the transition region between middle/upper atm. |
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| 76 | |
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| 77 | if (ok_strato) then !overwrite defaults above with values from def file |
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| 78 | fac_mid=dissip_fac_mid |
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| 79 | fac_up=dissip_fac_up |
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| 80 | delta=dissip_deltaz |
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| 81 | endif |
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| 82 | |
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| 83 | middle=startalt+delta/2 |
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| 84 | write(lunout,*)"inidissip: multiplicative factors in altitude:", & |
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| 85 | " fac_mid=",fac_mid," fac_up=",fac_up |
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| 86 | write(lunout,*)" transition mid/up : startalt (km) =",startalt, & |
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| 87 | " delta (km) =",delta |
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| 88 | endif |
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| 89 | endif !of if firstcall |
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| 90 | |
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| 91 | !----------------------------------------------------------------------- |
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| 92 | ! |
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| 93 | ! calcul des valeurs propres des operateurs par methode iterrative: |
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| 94 | ! ----------------------------------------------------------------- |
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| 95 | |
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| 96 | crot = -1. |
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| 97 | cdivu = -1. |
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| 98 | cdivh = -1. |
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| 99 | |
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| 100 | ! calcul de la valeur propre de divgrad: |
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| 101 | ! -------------------------------------- |
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| 102 | idum = 0 |
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| 103 | DO l = 1, llm |
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| 104 | DO ij = 1, ip1jmp1 |
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| 105 | deltap(ij,l) = 1. |
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| 106 | ENDDO |
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| 107 | ENDDO |
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| 108 | |
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| 109 | idum = -1 |
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| 110 | zh(1) = RAN1(idum)-.5 |
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| 111 | idum = 0 |
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| 112 | DO ij = 2, ip1jmp1 |
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| 113 | zh(ij) = RAN1(idum) -.5 |
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| 114 | ENDDO |
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| 115 | |
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| 116 | CALL filtreg (zh,jjp1,1,2,1,.TRUE.,1) |
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| 117 | |
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| 118 | CALL minmax(iip1*jjp1,zh,zhmin,zhmax ) |
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| 119 | |
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| 120 | IF ( zhmin .GE. zhmax ) THEN |
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| 121 | write(lunout,*)' Inidissip zh min max ',zhmin,zhmax |
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| 122 | abort_message='probleme generateur alleatoire dans inidissip' |
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| 123 | call abort_gcm('inidissip',abort_message,1) |
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| 124 | ENDIF |
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| 125 | |
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| 126 | zllm = ABS( zhmax ) |
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| 127 | DO l = 1,50 |
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| 128 | IF(lstardis) THEN |
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| 129 | CALL divgrad2(1,zh,deltap,niterh,divgra) |
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| 130 | ELSE |
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| 131 | CALL divgrad (1,zh,niterh,divgra) |
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| 132 | ENDIF |
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| 133 | |
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| 134 | zllm = ABS(maxval(divgra)) |
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| 135 | zh = divgra / zllm |
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| 136 | ENDDO |
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| 137 | |
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| 138 | IF(lstardis) THEN |
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| 139 | cdivh = 1./ zllm |
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| 140 | ELSE |
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| 141 | cdivh = zllm ** ( -1./niterh ) |
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| 142 | ENDIF |
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| 143 | |
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| 144 | ! calcul des valeurs propres de gradiv (ii =1) et nxgrarot(ii=2) |
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| 145 | ! ----------------------------------------------------------------- |
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| 146 | write(lunout,*)'inidissip: calcul des valeurs propres' |
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| 147 | |
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| 148 | DO ii = 1, 2 |
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| 149 | ! |
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| 150 | DO ij = 1, ip1jmp1 |
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| 151 | zu(ij) = RAN1(idum) -.5 |
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| 152 | ENDDO |
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| 153 | CALL filtreg (zu,jjp1,1,2,1,.TRUE.,1) |
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| 154 | DO ij = 1, ip1jm |
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| 155 | zv(ij) = RAN1(idum) -.5 |
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| 156 | ENDDO |
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| 157 | CALL filtreg (zv,jjm,1,2,1,.FALSE.,1) |
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| 158 | |
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| 159 | CALL minmax(iip1*jjp1,zu,umin,ullm ) |
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| 160 | CALL minmax(iip1*jjm, zv,vmin,vllm ) |
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| 161 | |
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| 162 | ullm = ABS ( ullm ) |
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| 163 | vllm = ABS ( vllm ) |
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| 164 | |
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| 165 | DO l = 1, 50 |
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| 166 | IF(ii.EQ.1) THEN |
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| 167 | !cccc CALL covcont( 1,zu,zv,zu,zv ) |
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| 168 | IF(lstardis) THEN |
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| 169 | CALL gradiv2( 1,zu,zv,nitergdiv,gx,gy ) |
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| 170 | ELSE |
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| 171 | CALL gradiv ( 1,zu,zv,nitergdiv,gx,gy ) |
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| 172 | ENDIF |
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| 173 | ELSE |
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| 174 | IF(lstardis) THEN |
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| 175 | CALL nxgraro2( 1,zu,zv,nitergrot,gx,gy ) |
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| 176 | ELSE |
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| 177 | CALL nxgrarot( 1,zu,zv,nitergrot,gx,gy ) |
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| 178 | ENDIF |
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| 179 | ENDIF |
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| 180 | |
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| 181 | zllm = max(abs(maxval(gx)), abs(maxval(gy))) |
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| 182 | zu = gx / zllm |
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| 183 | zv = gy / zllm |
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| 184 | end DO |
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| 185 | |
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| 186 | IF ( ii.EQ.1 ) THEN |
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| 187 | IF(lstardis) THEN |
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| 188 | cdivu = 1./zllm |
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| 189 | ELSE |
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| 190 | cdivu = zllm **( -1./nitergdiv ) |
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| 191 | ENDIF |
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| 192 | ELSE |
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| 193 | IF(lstardis) THEN |
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| 194 | crot = 1./ zllm |
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| 195 | ELSE |
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| 196 | crot = zllm **( -1./nitergrot ) |
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| 197 | ENDIF |
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| 198 | ENDIF |
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| 199 | |
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| 200 | end DO |
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| 201 | |
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| 202 | ! petit test pour les operateurs non star: |
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| 203 | ! ---------------------------------------- |
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| 204 | |
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| 205 | ! IF(.NOT.lstardis) THEN |
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| 206 | fact = rad*24./REAL(jjm) |
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| 207 | fact = fact*fact |
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| 208 | write(lunout,*)'inidissip: coef u ', fact/cdivu, 1./cdivu |
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| 209 | write(lunout,*)'inidissip: coef r ', fact/crot , 1./crot |
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| 210 | write(lunout,*)'inidissip: coef h ', fact/cdivh, 1./cdivh |
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| 211 | ! ENDIF |
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| 212 | |
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| 213 | !----------------------------------------------------------------------- |
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| 214 | ! variation verticale du coefficient de dissipation: |
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| 215 | ! -------------------------------------------------- |
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| 216 | |
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| 217 | if (planet_type.eq."earth") then |
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| 218 | |
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| 219 | if (vert_prof_dissip == 1) then |
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| 220 | do l=1,llm |
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| 221 | pseudoz=8.*log(preff/presnivs(l)) |
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| 222 | zvert(l)=1+ & |
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| 223 | (tanh((pseudoz-dissip_zref)/dissip_deltaz)+1.)/2. & |
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| 224 | *(dissip_factz-1.) |
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| 225 | enddo |
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| 226 | else |
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| 227 | DO l=1,llm |
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| 228 | zvert(l)=1. |
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| 229 | ENDDO |
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| 230 | fact=2. |
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| 231 | DO l = 1, llm |
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| 232 | zz = 1. - preff/presnivs(l) |
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| 233 | zvert(l)= fact -( fact-1.)/( 1.+zz*zz ) |
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| 234 | ENDDO |
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| 235 | endif ! of if (vert_prof_dissip == 1) |
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| 236 | |
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| 237 | else ! other planets |
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| 238 | |
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| 239 | if (vert_prof_dissip == 0) then |
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| 240 | ! First step: going from 1 to dissip_fac_mid (in gcm.def) |
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| 241 | !============ |
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| 242 | DO l=1,llm |
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| 243 | zz = 1. - preff/presnivs(l) |
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| 244 | zvert(l)= dissip_fac_mid -( dissip_fac_mid-1.)/( 1.+zz*zz ) |
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| 245 | ENDDO |
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| 246 | |
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| 247 | write(lunout,*) 'Dissipation : ' |
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| 248 | write(lunout,*) 'Multiplication de la dissipation en altitude :' |
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| 249 | write(lunout,*) ' dissip_fac_mid =', dissip_fac_mid |
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| 250 | |
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| 251 | ! Second step if ok_strato: from dissip_fac_mid to dissip_fac_up (in gcm.def) |
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| 252 | !========================== |
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| 253 | ! Utilisation de la fonction tangente hyperbolique pour augmenter |
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| 254 | ! arbitrairement la dissipation et donc la stabilite du modele a |
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| 255 | ! partir d'une certaine altitude. |
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| 256 | |
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| 257 | ! Le facteur multiplicatif de basse atmosphere etant deja pris |
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| 258 | ! en compte, il faut diviser le facteur multiplicatif de haute |
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| 259 | ! atmosphere par celui-ci. |
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| 260 | |
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| 261 | if (ok_strato) then |
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| 262 | |
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| 263 | Pup = dissip_pupstart*exp(-0.5*dissip_deltaz/dissip_hdelta) |
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| 264 | do l=1,llm |
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| 265 | zvert(l)= zvert(l)*(1.0+( (dissip_fac_up/dissip_fac_mid-1) & |
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| 266 | *(1-(0.5*(1+tanh(-6./dissip_deltaz* & |
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| 267 | (-dissip_hdelta*log(presnivs(l)/Pup)) )))) )) |
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| 268 | enddo |
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| 269 | |
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| 270 | write(*,*) ' dissip_fac_up =', dissip_fac_up |
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| 271 | write(*,*) 'Transition mid /up: Pupstart,delta =', & |
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| 272 | dissip_pupstart,'Pa', dissip_deltaz , '(km)' |
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| 273 | |
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| 274 | endif ! of if (ok_strato) |
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| 275 | elseif (vert_prof_dissip==1) then |
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| 276 | DO l=1,llm |
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| 277 | zz = 1. - preff/presnivs(l) |
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| 278 | ! zvert(l)= dissip_fac_mid -( dissip_fac_mid-1.)/( 1.+zz*zz ) |
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| 279 | zvert(l)= fac_mid -( fac_mid-1.)/( 1.+zz*zz ) |
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| 280 | |
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| 281 | zvert(l)= zvert(l)*(1.0+((fac_up/fac_mid-1)* & |
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| 282 | (1-(0.5*(1+tanh(-6./ & |
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| 283 | delta*(scaleheight*(-log(presnivs(l)/preff))-middle))))) & |
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| 284 | )) |
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| 285 | ENDDO |
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| 286 | write(lunout,*) "inidissip: vert_prof_disip=1, scaleheight=",scaleheight |
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| 287 | write(lunout,*) " fac_mid=",fac_mid,", fac_up=",fac_up |
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| 288 | |
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| 289 | else |
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| 290 | write(lunout,*) 'wrong value for vert_prof_dissip:',vert_prof_dissip |
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| 291 | abort_message='wrong value for vert_prof_dissip' |
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| 292 | call abort_gcm('inidissip',abort_message,1) |
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| 293 | endif ! of (vert_prof_dissip == 0) |
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| 294 | endif ! of if (planet_type.eq."earth") |
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| 295 | |
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| 296 | |
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| 297 | write(lunout,*)'inidissip: Time constants for lateral dissipation' |
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| 298 | |
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| 299 | tetamin = 1.e+6 |
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| 300 | |
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| 301 | DO l=1,llm |
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| 302 | tetaudiv(l) = zvert(l)/tetagdiv |
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| 303 | tetaurot(l) = zvert(l)/tetagrot |
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| 304 | tetah(l) = zvert(l)/tetatemp |
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| 305 | |
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| 306 | IF( tetamin.GT. (1./tetaudiv(l)) ) tetamin = 1./ tetaudiv(l) |
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| 307 | IF( tetamin.GT. (1./tetaurot(l)) ) tetamin = 1./ tetaurot(l) |
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| 308 | IF( tetamin.GT. (1./ tetah(l)) ) tetamin = 1./ tetah(l) |
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| 309 | ENDDO |
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| 310 | |
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| 311 | ! If dissip_period=0 calculate value for dissipation period, else keep value read from gcm.def |
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| 312 | IF (dissip_period == 0) THEN |
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| 313 | dissip_period = INT( tetamin/( 2.*dtvr*iperiod) ) * iperiod |
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| 314 | write(lunout,*)'inidissip: tetamin dtvr iperiod dissip_period(intermed) ',tetamin,dtvr,iperiod,dissip_period |
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| 315 | dissip_period = MAX(iperiod,dissip_period) |
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| 316 | END IF |
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| 317 | |
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| 318 | dtdiss = dissip_period * dtvr |
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| 319 | write(lunout,*)'inidissip: dissip_period=',dissip_period,' dtdiss=',dtdiss,' dtvr=',dtvr |
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| 320 | |
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| 321 | write(lunout,*)'pseudoZ(km) zvert dt(tetagdiv) dt(tetagrot) dt(divgrad)' |
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| 322 | DO l = 1,llm |
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| 323 | write(lunout,'(f6.1,x,4(1pe14.7,x))') & |
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| 324 | pseudoalt(l),zvert(l),dtdiss*tetaudiv(l),dtdiss*tetaurot(l),dtdiss*tetah(l) |
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| 325 | ! test if disipation is not too strong (for Explicit Euler time marching) |
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| 326 | if (dtdiss*tetaudiv(l).gt.1.9) then |
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| 327 | write(lunout,*)"STOP : lateral dissipation is too intense and will" |
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| 328 | write(lunout,*)" generate instabilities in the model !" |
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| 329 | write(lunout,*)" You must increase tetagdiv (or increase dissip_period" |
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| 330 | write(lunout,*)" or increase day_stap)" |
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| 331 | endif |
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| 332 | if (dtdiss*tetaurot(l).gt.1.9) then |
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| 333 | write(lunout,*)"STOP : lateral dissipation is too intense and will" |
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| 334 | write(lunout,*)" generate instabilities in the model !" |
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| 335 | write(lunout,*)" You must increase tetaurot (or increase dissip_period" |
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| 336 | write(lunout,*)" or increase day_stap)" |
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| 337 | endif |
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| 338 | if (dtdiss*tetah(l).gt.1.9) then |
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| 339 | write(lunout,*)"STOP : lateral dissipation is too intense and will" |
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| 340 | write(lunout,*)" generate instabilities in the model !" |
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| 341 | write(lunout,*)" You must increase tetah (or increase dissip_period" |
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| 342 | write(lunout,*)" or increase day_stap)" |
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| 343 | endif |
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| 344 | ENDDO ! of DO l=1,llm |
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| 345 | |
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| 346 | END SUBROUTINE inidissip |
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