[1793] | 1 | ! |
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| 2 | ! $Id: $ |
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| 3 | ! |
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[5246] | 4 | SUBROUTINE top_bound_loc(vcov,ucov,teta,masse,dt) |
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[5281] | 5 | USE comgeom2_mod_h |
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[5280] | 6 | USE comdissipn_mod_h |
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[5246] | 7 | USE parallel_lmdz |
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| 8 | USE comconst_mod, ONLY: iflag_top_bound, mode_top_bound, & |
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| 9 | tau_top_bound |
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| 10 | USE comvert_mod, ONLY: presnivs, preff, scaleheight |
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[2600] | 11 | |
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[5271] | 12 | USE dimensions_mod, ONLY: iim, jjm, llm, ndm |
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[5272] | 13 | USE paramet_mod_h, ONLY: iip1, iip2, iip3, jjp1, llmp1, llmp2, llmm1, kftd, ip1jm, ip1jmp1, & |
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| 14 | ip1jmi1, ijp1llm, ijmllm, mvar, jcfil, jcfllm |
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[5271] | 15 | IMPLICIT NONE |
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[5246] | 16 | ! |
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[5271] | 17 | |
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[5272] | 18 | |
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[1632] | 19 | |
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| 20 | |
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[5246] | 21 | ! .. DISSIPATION LINEAIRE A HAUT NIVEAU, RUN MESO, |
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| 22 | ! F. LOTT DEC. 2006 |
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| 23 | ! ( 10/12/06 ) |
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[1632] | 24 | |
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[5246] | 25 | !======================================================================= |
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| 26 | ! |
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| 27 | ! Auteur: F. LOTT |
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| 28 | ! ------- |
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| 29 | ! |
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| 30 | ! Objet: |
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| 31 | ! ------ |
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| 32 | ! |
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[5271] | 33 | ! Dissipation lin�aire (ex top_bound de la physique) |
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[5246] | 34 | ! |
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| 35 | !======================================================================= |
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[1632] | 36 | |
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[5246] | 37 | ! top_bound sponge layer model: |
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| 38 | ! Quenching is modeled as: A(t)=Am+A0*exp(-lambda*t) |
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| 39 | ! where Am is the zonal average of the field (or zero), and lambda the inverse |
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| 40 | ! of the characteristic quenching/relaxation time scale |
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| 41 | ! Thus, assuming Am to be time-independent, field at time t+dt is given by: |
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| 42 | ! A(t+dt)=A(t)-(A(t)-Am)*(1-exp(-lambda*t)) |
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| 43 | ! Moreover lambda can be a function of model level (see below), and relaxation |
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| 44 | ! can be toward the average zonal field or just zero (see below). |
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[1793] | 45 | |
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[5246] | 46 | ! NB: top_bound sponge is only called from leapfrog if ok_strato=.true. |
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[1793] | 47 | |
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[5246] | 48 | ! sponge parameters: (loaded/set in conf_gcm.F ; stored in comconst_mod) |
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| 49 | ! iflag_top_bound=0 for no sponge |
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| 50 | ! iflag_top_bound=1 for sponge over 4 topmost layers |
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| 51 | ! iflag_top_bound=2 for sponge from top to ~1% of top layer pressure |
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| 52 | ! mode_top_bound=0: no relaxation |
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| 53 | ! mode_top_bound=1: u and v relax towards 0 |
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| 54 | ! mode_top_bound=2: u and v relax towards their zonal mean |
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| 55 | ! mode_top_bound=3: u,v and pot. temp. relax towards their zonal mean |
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| 56 | ! tau_top_bound : inverse of charactericstic relaxation time scale at |
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| 57 | ! the topmost layer (Hz) |
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[1793] | 58 | |
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| 59 | |
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[5246] | 60 | INCLUDE "iniprint.h" |
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[1632] | 61 | |
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[5246] | 62 | ! Arguments: |
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| 63 | ! ---------- |
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[1632] | 64 | |
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[5246] | 65 | real,intent(inout) :: ucov(iip1,jjb_u:jje_u,llm) ! covariant zonal wind |
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| 66 | real,intent(inout) :: vcov(iip1,jjb_v:jje_v,llm) ! covariant meridional wind |
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| 67 | real,intent(inout) :: teta(iip1,jjb_u:jje_u,llm) ! potential temperature |
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| 68 | real,intent(in) :: masse(iip1,jjb_u:jje_u,llm) ! mass of atmosphere |
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| 69 | real,intent(in) :: dt ! time step (s) of sponge model |
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[1632] | 70 | |
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[5246] | 71 | ! REAL dv(iip1,jjb_v:jje_v,llm),du(iip1,jjb_u:jje_u,llm) |
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| 72 | ! REAL dh(iip1,jjb_u:jje_u,llm) |
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[1793] | 73 | |
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[5246] | 74 | ! Local: |
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| 75 | ! ------ |
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| 76 | REAL :: massebx(iip1,jjb_u:jje_u,llm),masseby(iip1,jjb_v:jje_v,llm) |
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| 77 | REAL :: zm |
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| 78 | REAL :: uzon(jjb_u:jje_u,llm),vzon(jjb_v:jje_v,llm) |
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| 79 | REAL :: tzon(jjb_u:jje_u,llm) |
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[1632] | 80 | |
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[5246] | 81 | integer :: i |
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| 82 | REAL,SAVE :: rdamp(llm) |
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| 83 | real,save :: lambda(llm) ! inverse or quenching time scale (Hz) |
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| 84 | LOGICAL,SAVE :: first=.true. |
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| 85 | INTEGER :: j,l,jjb,jje |
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[1632] | 86 | |
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[1793] | 87 | |
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[5246] | 88 | if (iflag_top_bound == 0) return |
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[1793] | 89 | |
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[5246] | 90 | if (first) then |
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| 91 | !$OMP BARRIER |
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| 92 | !$OMP MASTER |
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| 93 | if (iflag_top_bound == 1) then |
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| 94 | ! sponge quenching over the topmost 4 atmospheric layers |
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| 95 | lambda(:)=0. |
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| 96 | lambda(llm)=tau_top_bound |
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| 97 | lambda(llm-1)=tau_top_bound/2. |
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| 98 | lambda(llm-2)=tau_top_bound/4. |
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| 99 | lambda(llm-3)=tau_top_bound/8. |
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| 100 | else if (iflag_top_bound == 2) then |
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| 101 | ! sponge quenching over topmost layers down to pressures which are |
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| 102 | ! higher than 100 times the topmost layer pressure |
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| 103 | lambda(:)=tau_top_bound & |
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| 104 | *max(presnivs(llm)/presnivs(:)-0.01,0.) |
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| 105 | endif |
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[1793] | 106 | |
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[5246] | 107 | ! quenching coefficient rdamp(:) |
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| 108 | ! rdamp(:)=dt*lambda(:) ! Explicit Euler approx. |
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| 109 | rdamp(:)=1.-exp(-lambda(:)*dt) |
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[1632] | 110 | |
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[5246] | 111 | write(lunout,*)'TOP_BOUND mode',mode_top_bound |
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| 112 | write(lunout,*)'Sponge layer coefficients' |
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| 113 | write(lunout,*)'p (Pa) z(km) tau(s) 1./tau (Hz)' |
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| 114 | do l=1,llm |
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| 115 | if (rdamp(l).ne.0.) then |
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| 116 | write(lunout,'(6(1pe12.4,1x))') & |
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| 117 | presnivs(l),log(preff/presnivs(l))*scaleheight, & |
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| 118 | 1./lambda(l),lambda(l) |
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| 119 | endif |
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| 120 | enddo |
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| 121 | first=.false. |
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| 122 | !$OMP END MASTER |
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| 123 | !$OMP BARRIER |
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| 124 | endif ! of if (first) |
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[1632] | 125 | |
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| 126 | |
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[5246] | 127 | CALL massbar_loc(masse,massebx,masseby) |
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[1632] | 128 | |
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[5246] | 129 | ! ! compute zonal average of vcov (or set it to zero) |
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| 130 | if (mode_top_bound.ge.2) then |
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| 131 | jjb=jj_begin |
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| 132 | jje=jj_end |
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| 133 | IF (pole_sud) jje=jj_end-1 |
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| 134 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 135 | do l=1,llm |
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| 136 | do j=jjb,jje |
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| 137 | zm=0. |
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| 138 | vzon(j,l)=0 |
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| 139 | do i=1,iim |
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| 140 | ! NB: we can work using vcov zonal mean rather than v since the |
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| 141 | ! cv coefficient (which relates the two) only varies with latitudes |
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| 142 | vzon(j,l)=vzon(j,l)+vcov(i,j,l)*masseby(i,j,l) |
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| 143 | zm=zm+masseby(i,j,l) |
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| 144 | enddo |
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| 145 | vzon(j,l)=vzon(j,l)/zm |
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| 146 | enddo |
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| 147 | enddo |
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| 148 | !$OMP END DO NOWAIT |
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| 149 | else |
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| 150 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 151 | do l=1,llm |
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| 152 | vzon(:,l)=0. |
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| 153 | enddo |
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| 154 | !$OMP END DO NOWAIT |
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| 155 | endif ! of if (mode_top_bound.ge.2) |
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[1632] | 156 | |
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[5246] | 157 | ! ! compute zonal average of u (or set it to zero) |
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| 158 | if (mode_top_bound.ge.2) then |
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| 159 | jjb=jj_begin |
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| 160 | jje=jj_end |
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| 161 | IF (pole_nord) jjb=jj_begin+1 |
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| 162 | IF (pole_sud) jje=jj_end-1 |
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| 163 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 164 | do l=1,llm |
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| 165 | do j=jjb,jje |
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| 166 | uzon(j,l)=0. |
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| 167 | zm=0. |
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| 168 | do i=1,iim |
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| 169 | uzon(j,l)=uzon(j,l)+massebx(i,j,l)*ucov(i,j,l)/cu(i,j) |
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| 170 | zm=zm+massebx(i,j,l) |
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| 171 | enddo |
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| 172 | uzon(j,l)=uzon(j,l)/zm |
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| 173 | enddo |
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| 174 | enddo |
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| 175 | !$OMP END DO NOWAIT |
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| 176 | else |
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| 177 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 178 | do l=1,llm |
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| 179 | uzon(:,l)=0. |
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| 180 | enddo |
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| 181 | !$OMP END DO NOWAIT |
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| 182 | endif ! of if (mode_top_bound.ge.2) |
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[1632] | 183 | |
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[5246] | 184 | ! ! compute zonal average of potential temperature, if necessary |
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| 185 | if (mode_top_bound.ge.3) then |
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| 186 | jjb=jj_begin |
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| 187 | jje=jj_end |
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| 188 | IF (pole_nord) jjb=jj_begin+1 |
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| 189 | IF (pole_sud) jje=jj_end-1 |
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| 190 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 191 | do l=1,llm |
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| 192 | do j=jjb,jje |
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| 193 | zm=0. |
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| 194 | tzon(j,l)=0. |
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| 195 | do i=1,iim |
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| 196 | tzon(j,l)=tzon(j,l)+teta(i,j,l)*masse(i,j,l) |
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| 197 | zm=zm+masse(i,j,l) |
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| 198 | enddo |
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| 199 | tzon(j,l)=tzon(j,l)/zm |
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| 200 | enddo |
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| 201 | enddo |
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| 202 | !$OMP END DO NOWAIT |
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| 203 | endif ! of if (mode_top_bound.ge.3) |
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[1632] | 204 | |
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[5246] | 205 | if (mode_top_bound.ge.1) then |
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| 206 | ! ! Apply sponge quenching on vcov: |
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| 207 | jjb=jj_begin |
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| 208 | jje=jj_end |
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| 209 | IF (pole_sud) jje=jj_end-1 |
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[1632] | 210 | |
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[5246] | 211 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 212 | do l=1,llm |
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| 213 | do j=jjb,jje |
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| 214 | do i=1,iip1 |
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| 215 | vcov(i,j,l)=vcov(i,j,l) & |
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| 216 | -rdamp(l)*(vcov(i,j,l)-vzon(j,l)) |
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| 217 | enddo |
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| 218 | enddo |
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| 219 | enddo |
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| 220 | !$OMP END DO NOWAIT |
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[1793] | 221 | |
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[5246] | 222 | ! ! Apply sponge quenching on ucov: |
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| 223 | jjb=jj_begin |
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| 224 | jje=jj_end |
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| 225 | IF (pole_nord) jjb=jj_begin+1 |
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| 226 | IF (pole_sud) jje=jj_end-1 |
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[1793] | 227 | |
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[5246] | 228 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 229 | do l=1,llm |
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| 230 | do j=jjb,jje |
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| 231 | do i=1,iip1 |
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| 232 | ucov(i,j,l)=ucov(i,j,l) & |
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| 233 | -rdamp(l)*(ucov(i,j,l)-cu(i,j)*uzon(j,l)) |
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| 234 | enddo |
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| 235 | enddo |
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| 236 | enddo |
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| 237 | !$OMP END DO NOWAIT |
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| 238 | endif ! of if (mode_top_bound.ge.1) |
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[1793] | 239 | |
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[5246] | 240 | if (mode_top_bound.ge.3) then |
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| 241 | ! ! Apply sponge quenching on teta: |
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| 242 | jjb=jj_begin |
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| 243 | jje=jj_end |
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| 244 | IF (pole_nord) jjb=jj_begin+1 |
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| 245 | IF (pole_sud) jje=jj_end-1 |
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[1793] | 246 | |
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[5246] | 247 | !$OMP DO SCHEDULE(STATIC,OMP_CHUNK) |
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| 248 | do l=1,llm |
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| 249 | do j=jjb,jje |
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| 250 | do i=1,iip1 |
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| 251 | teta(i,j,l)=teta(i,j,l) & |
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| 252 | -rdamp(l)*(teta(i,j,l)-tzon(j,l)) |
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| 253 | enddo |
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| 254 | enddo |
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| 255 | enddo |
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| 256 | !$OMP END DO NOWAIT |
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| 257 | endif ! of if (mode_top_bond.ge.3) |
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| 258 | |
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| 259 | END SUBROUTINE top_bound_loc |
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