| 1 | ! |
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| 2 | ! $Id: iniacademic.F90 2622 2016-09-04 06:12:02Z jghattas $ |
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| 3 | ! |
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| 4 | SUBROUTINE iniacademic(vcov,ucov,teta,q,masse,ps,phis,time_0) |
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| 5 | |
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| 6 | USE filtreg_mod, ONLY: inifilr |
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| 7 | USE infotrac, ONLY : nqtot |
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| 8 | USE control_mod, ONLY: day_step,planet_type |
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| 9 | #ifdef CPP_IOIPSL |
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| 10 | USE IOIPSL, ONLY: getin |
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| 11 | #else |
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| 12 | ! if not using IOIPSL, we still need to use (a local version of) getin |
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| 13 | USE ioipsl_getincom, ONLY: getin |
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| 14 | #endif |
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| 15 | USE Write_Field |
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| 16 | use exner_hyb_m, only: exner_hyb |
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| 17 | use exner_milieu_m, only: exner_milieu |
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| 18 | USE comconst_mod, ONLY: cpp, kappa, g, daysec, dtvr, pi, im, jm |
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| 19 | USE logic_mod, ONLY: iflag_phys, read_start |
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| 20 | USE comvert_mod, ONLY: ap, bp, preff, presnivs, pressure_exner |
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| 21 | USE temps_mod, ONLY: annee_ref, day_ini, day_ref |
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| 22 | USE ener_mod, ONLY: etot0,ptot0,ztot0,stot0,ang0 |
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| 23 | |
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| 24 | ! Author: Frederic Hourdin original: 15/01/93 |
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| 25 | ! The forcing defined here is from Held and Suarez, 1994, Bulletin |
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| 26 | ! of the American Meteorological Society, 75, 1825. |
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| 27 | |
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| 28 | IMPLICIT NONE |
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| 29 | |
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| 30 | ! Declararations: |
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| 31 | ! --------------- |
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| 32 | |
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| 33 | include "dimensions.h" |
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| 34 | include "paramet.h" |
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| 35 | include "comgeom.h" |
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| 36 | include "academic.h" |
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| 37 | include "iniprint.h" |
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| 38 | |
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| 39 | ! Arguments: |
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| 40 | ! ---------- |
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| 41 | |
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| 42 | REAL,INTENT(OUT) :: time_0 |
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| 43 | |
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| 44 | ! fields |
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| 45 | REAL,INTENT(OUT) :: vcov(ip1jm,llm) ! meridional covariant wind |
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| 46 | REAL,INTENT(OUT) :: ucov(ip1jmp1,llm) ! zonal covariant wind |
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| 47 | REAL,INTENT(OUT) :: teta(ip1jmp1,llm) ! potential temperature (K) |
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| 48 | REAL,INTENT(OUT) :: q(ip1jmp1,llm,nqtot) ! advected tracers (.../kg_of_air) |
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| 49 | REAL,INTENT(OUT) :: ps(ip1jmp1) ! surface pressure (Pa) |
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| 50 | REAL,INTENT(OUT) :: masse(ip1jmp1,llm) ! air mass in grid cell (kg) |
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| 51 | REAL,INTENT(OUT) :: phis(ip1jmp1) ! surface geopotential |
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| 52 | |
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| 53 | ! Local: |
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| 54 | ! ------ |
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| 55 | |
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| 56 | REAL p (ip1jmp1,llmp1 ) ! pression aux interfac.des couches |
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| 57 | REAL pks(ip1jmp1) ! exner au sol |
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| 58 | REAL pk(ip1jmp1,llm) ! exner au milieu des couches |
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| 59 | REAL phi(ip1jmp1,llm) ! geopotentiel |
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| 60 | REAL ddsin,zsig,tetapv,w_pv ! variables auxiliaires |
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| 61 | real tetastrat ! potential temperature in the stratosphere, in K |
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| 62 | real tetajl(jjp1,llm) |
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| 63 | INTEGER i,j,l,lsup,ij |
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| 64 | |
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| 65 | REAL teta0,ttp,delt_y,delt_z,eps ! Constantes pour profil de T |
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| 66 | REAL k_f,k_c_a,k_c_s ! Constantes de rappel |
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| 67 | LOGICAL ok_geost ! Initialisation vent geost. ou nul |
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| 68 | LOGICAL ok_pv ! Polar Vortex |
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| 69 | REAL phi_pv,dphi_pv,gam_pv ! Constantes pour polar vortex |
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| 70 | |
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| 71 | real zz,ran1 |
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| 72 | integer idum |
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| 73 | |
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| 74 | REAL zdtvr |
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| 75 | |
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| 76 | character(len=*),parameter :: modname="iniacademic" |
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| 77 | character(len=80) :: abort_message |
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| 78 | |
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| 79 | |
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| 80 | ! Sanity check: verify that options selected by user are not incompatible |
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| 81 | if ((iflag_phys==1).and. .not. read_start) then |
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| 82 | write(lunout,*) trim(modname)," error: if read_start is set to ", & |
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| 83 | " false then iflag_phys should not be 1" |
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| 84 | write(lunout,*) "You most likely want an aquaplanet initialisation", & |
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| 85 | " (iflag_phys >= 100)" |
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| 86 | call abort_gcm(modname,"incompatible iflag_phys==1 and read_start==.false.",1) |
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| 87 | endif |
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| 88 | |
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| 89 | !----------------------------------------------------------------------- |
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| 90 | ! 1. Initializations for Earth-like case |
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| 91 | ! -------------------------------------- |
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| 92 | ! |
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| 93 | ! initialize planet radius, rotation rate,... |
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| 94 | call conf_planete |
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| 95 | |
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| 96 | time_0=0. |
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| 97 | day_ref=1 |
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| 98 | annee_ref=0 |
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| 99 | |
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| 100 | im = iim |
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| 101 | jm = jjm |
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| 102 | day_ini = 1 |
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| 103 | dtvr = daysec/REAL(day_step) |
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| 104 | zdtvr=dtvr |
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| 105 | etot0 = 0. |
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| 106 | ptot0 = 0. |
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| 107 | ztot0 = 0. |
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| 108 | stot0 = 0. |
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| 109 | ang0 = 0. |
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| 110 | |
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| 111 | if (llm == 1) then |
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| 112 | ! specific initializations for the shallow water case |
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| 113 | kappa=1 |
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| 114 | endif |
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| 115 | |
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| 116 | CALL iniconst |
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| 117 | CALL inigeom |
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| 118 | CALL inifilr |
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| 119 | |
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| 120 | if (llm == 1) then |
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| 121 | ! initialize fields for the shallow water case, if required |
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| 122 | if (.not.read_start) then |
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| 123 | phis(:)=0. |
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| 124 | q(:,:,:)=0 |
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| 125 | CALL sw_case_williamson91_6(vcov,ucov,teta,masse,ps) |
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| 126 | endif |
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| 127 | endif |
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| 128 | |
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| 129 | academic_case: if (iflag_phys >= 2) then |
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| 130 | ! initializations |
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| 131 | |
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| 132 | ! 1. local parameters |
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| 133 | ! by convention, winter is in the southern hemisphere |
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| 134 | ! Geostrophic wind or no wind? |
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| 135 | ok_geost=.TRUE. |
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| 136 | CALL getin('ok_geost',ok_geost) |
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| 137 | ! Constants for Newtonian relaxation and friction |
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| 138 | k_f=1. !friction |
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| 139 | CALL getin('k_j',k_f) |
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| 140 | k_f=1./(daysec*k_f) |
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| 141 | k_c_s=4. !cooling surface |
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| 142 | CALL getin('k_c_s',k_c_s) |
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| 143 | k_c_s=1./(daysec*k_c_s) |
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| 144 | k_c_a=40. !cooling free atm |
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| 145 | CALL getin('k_c_a',k_c_a) |
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| 146 | k_c_a=1./(daysec*k_c_a) |
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| 147 | ! Constants for Teta equilibrium profile |
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| 148 | teta0=315. ! mean Teta (S.H. 315K) |
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| 149 | CALL getin('teta0',teta0) |
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| 150 | ttp=200. ! Tropopause temperature (S.H. 200K) |
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| 151 | CALL getin('ttp',ttp) |
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| 152 | eps=0. ! Deviation to N-S symmetry(~0-20K) |
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| 153 | CALL getin('eps',eps) |
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| 154 | delt_y=60. ! Merid Temp. Gradient (S.H. 60K) |
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| 155 | CALL getin('delt_y',delt_y) |
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| 156 | delt_z=10. ! Vertical Gradient (S.H. 10K) |
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| 157 | CALL getin('delt_z',delt_z) |
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| 158 | ! Polar vortex |
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| 159 | ok_pv=.false. |
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| 160 | CALL getin('ok_pv',ok_pv) |
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| 161 | phi_pv=-50. ! Latitude of edge of vortex |
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| 162 | CALL getin('phi_pv',phi_pv) |
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| 163 | phi_pv=phi_pv*pi/180. |
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| 164 | dphi_pv=5. ! Width of the edge |
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| 165 | CALL getin('dphi_pv',dphi_pv) |
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| 166 | dphi_pv=dphi_pv*pi/180. |
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| 167 | gam_pv=4. ! -dT/dz vortex (in K/km) |
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| 168 | CALL getin('gam_pv',gam_pv) |
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| 169 | |
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| 170 | ! 2. Initialize fields towards which to relax |
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| 171 | ! Friction |
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| 172 | knewt_g=k_c_a |
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| 173 | DO l=1,llm |
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| 174 | zsig=presnivs(l)/preff |
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| 175 | knewt_t(l)=(k_c_s-k_c_a)*MAX(0.,(zsig-0.7)/0.3) |
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| 176 | kfrict(l)=k_f*MAX(0.,(zsig-0.7)/0.3) |
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| 177 | ENDDO |
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| 178 | DO j=1,jjp1 |
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| 179 | clat4((j-1)*iip1+1:j*iip1)=cos(rlatu(j))**4 |
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| 180 | ENDDO |
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| 181 | |
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| 182 | ! Potential temperature |
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| 183 | DO l=1,llm |
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| 184 | zsig=presnivs(l)/preff |
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| 185 | tetastrat=ttp*zsig**(-kappa) |
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| 186 | tetapv=tetastrat |
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| 187 | IF ((ok_pv).AND.(zsig.LT.0.1)) THEN |
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| 188 | tetapv=tetastrat*(zsig*10.)**(kappa*cpp*gam_pv/1000./g) |
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| 189 | ENDIF |
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| 190 | DO j=1,jjp1 |
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| 191 | ! Troposphere |
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| 192 | ddsin=sin(rlatu(j)) |
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| 193 | tetajl(j,l)=teta0-delt_y*ddsin*ddsin+eps*ddsin & |
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| 194 | -delt_z*(1.-ddsin*ddsin)*log(zsig) |
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| 195 | if (planet_type=="giant") then |
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| 196 | tetajl(j,l)=teta0+(delt_y* & |
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| 197 | ((sin(rlatu(j)*3.14159*eps+0.0001))**2) & |
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| 198 | / ((rlatu(j)*3.14159*eps+0.0001)**2)) & |
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| 199 | -delt_z*log(zsig) |
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| 200 | endif |
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| 201 | ! Profil stratospherique isotherme (+vortex) |
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| 202 | w_pv=(1.-tanh((rlatu(j)-phi_pv)/dphi_pv))/2. |
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| 203 | tetastrat=tetastrat*(1.-w_pv)+tetapv*w_pv |
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| 204 | tetajl(j,l)=MAX(tetajl(j,l),tetastrat) |
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| 205 | ENDDO |
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| 206 | ENDDO |
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| 207 | |
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| 208 | ! CALL writefield('theta_eq',tetajl) |
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| 209 | |
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| 210 | do l=1,llm |
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| 211 | do j=1,jjp1 |
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| 212 | do i=1,iip1 |
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| 213 | ij=(j-1)*iip1+i |
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| 214 | tetarappel(ij,l)=tetajl(j,l) |
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| 215 | enddo |
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| 216 | enddo |
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| 217 | enddo |
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| 218 | |
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| 219 | ! 3. Initialize fields (if necessary) |
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| 220 | IF (.NOT. read_start) THEN |
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| 221 | ! surface pressure |
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| 222 | if (iflag_phys>2) then |
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| 223 | ! specific value for CMIP5 aqua/terra planets |
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| 224 | ! "Specify the initial dry mass to be equivalent to |
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| 225 | ! a global mean surface pressure (101325 minus 245) Pa." |
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| 226 | ps(:)=101080. |
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| 227 | else |
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| 228 | ! use reference surface pressure |
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| 229 | ps(:)=preff |
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| 230 | endif |
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| 231 | |
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| 232 | ! ground geopotential |
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| 233 | phis(:)=0. |
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| 234 | |
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| 235 | CALL pression ( ip1jmp1, ap, bp, ps, p ) |
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| 236 | if (pressure_exner) then |
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| 237 | CALL exner_hyb( ip1jmp1, ps, p, pks, pk) |
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| 238 | else |
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| 239 | call exner_milieu(ip1jmp1,ps,p,pks,pk) |
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| 240 | endif |
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| 241 | CALL massdair(p,masse) |
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| 242 | |
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| 243 | ! bulk initialization of temperature |
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| 244 | teta(:,:)=tetarappel(:,:) |
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| 245 | |
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| 246 | ! geopotential |
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| 247 | CALL geopot(ip1jmp1,teta,pk,pks,phis,phi) |
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| 248 | |
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| 249 | ! winds |
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| 250 | if (ok_geost) then |
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| 251 | call ugeostr(phi,ucov) |
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| 252 | else |
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| 253 | ucov(:,:)=0. |
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| 254 | endif |
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| 255 | vcov(:,:)=0. |
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| 256 | |
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| 257 | ! bulk initialization of tracers |
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| 258 | if (planet_type=="earth") then |
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| 259 | ! Earth: first two tracers will be water |
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| 260 | do i=1,nqtot |
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| 261 | if (i == 1) q(:,:,i)=1.e-10 |
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| 262 | if (i == 2) q(:,:,i)=1.e-15 |
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| 263 | if (i.gt.2) q(:,:,i)=0. |
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| 264 | enddo |
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| 265 | else |
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| 266 | q(:,:,:)=0 |
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| 267 | endif ! of if (planet_type=="earth") |
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| 268 | |
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| 269 | ! add random perturbation to temperature |
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| 270 | idum = -1 |
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| 271 | zz = ran1(idum) |
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| 272 | idum = 0 |
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| 273 | do l=1,llm |
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| 274 | do ij=iip2,ip1jm |
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| 275 | teta(ij,l)=teta(ij,l)*(1.+0.005*ran1(idum)) |
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| 276 | enddo |
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| 277 | enddo |
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| 278 | |
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| 279 | ! maintain periodicity in longitude |
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| 280 | do l=1,llm |
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| 281 | do ij=1,ip1jmp1,iip1 |
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| 282 | teta(ij+iim,l)=teta(ij,l) |
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| 283 | enddo |
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| 284 | enddo |
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| 285 | |
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| 286 | ENDIF ! of IF (.NOT. read_start) |
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| 287 | endif academic_case |
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| 288 | |
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| 289 | END SUBROUTINE iniacademic |
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