| 1 |
|
| 2 |
SUBROUTINE cv3_trigger(len,nd,icb,plcl,p,th,tv,tvp & |
| 3 |
,pbase,buoybase,iflag,sig,w0) |
| 4 |
use cvparam3 |
| 5 |
implicit none |
| 6 |
|
| 7 |
!------------------------------------------------------------------- |
| 8 |
! --- TRIGGERING |
| 9 |
! |
| 10 |
! - computes the cloud base |
| 11 |
! - triggering (crude in this version) |
| 12 |
! - relaxation of sig and w0 when no convection |
| 13 |
! |
| 14 |
! Caution1: if no convection, we set iflag=4 |
| 15 |
! (it used to be 0 in convect3) |
| 16 |
! |
| 17 |
! Caution2: at this stage, tvp (and thus buoy) are know up |
| 18 |
! through icb only! |
| 19 |
! -> the buoyancy below cloud base not (yet) set to the cloud base buoyancy |
| 20 |
!------------------------------------------------------------------- |
| 21 |
|
| 22 |
|
| 23 |
! input: |
| 24 |
integer len, nd |
| 25 |
integer icb(len) |
| 26 |
real plcl(len), p(len,nd) |
| 27 |
real th(len,nd), tv(len,nd), tvp(len,nd) |
| 28 |
|
| 29 |
! output: |
| 30 |
real pbase(len), buoybase(len) |
| 31 |
|
| 32 |
! input AND output: |
| 33 |
integer iflag(len) |
| 34 |
real sig(len,nd), w0(len,nd) |
| 35 |
|
| 36 |
! local variables: |
| 37 |
integer i,k |
| 38 |
real tvpbase, tvbase, tdif, ath, ath1 |
| 39 |
|
| 40 |
! |
| 41 |
! *** set cloud base buoyancy at (plcl+dpbase) level buoyancy |
| 42 |
! |
| 43 |
do 100 i=1,len |
| 44 |
pbase(i) = plcl(i) + dpbase |
| 45 |
tvpbase = tvp(i,icb(i))*(pbase(i)-p(i,icb(i)+1)) & |
| 46 |
/(p(i,icb(i))-p(i,icb(i)+1)) & |
| 47 |
+ tvp(i,icb(i)+1)*(p(i,icb(i))-pbase(i)) & |
| 48 |
/(p(i,icb(i))-p(i,icb(i)+1)) |
| 49 |
tvbase = tv(i,icb(i))*(pbase(i)-p(i,icb(i)+1)) & |
| 50 |
/(p(i,icb(i))-p(i,icb(i)+1)) & |
| 51 |
+ tv(i,icb(i)+1)*(p(i,icb(i))-pbase(i)) & |
| 52 |
/(p(i,icb(i))-p(i,icb(i)+1)) |
| 53 |
buoybase(i) = tvpbase - tvbase |
| 54 |
100 continue |
| 55 |
|
| 56 |
! |
| 57 |
! *** make sure that column is dry adiabatic between the surface *** |
| 58 |
! *** and cloud base, and that lifted air is positively buoyant *** |
| 59 |
! *** at cloud base *** |
| 60 |
! *** if not, return to calling program after resetting *** |
| 61 |
! *** sig(i) and w0(i) *** |
| 62 |
! |
| 63 |
|
| 64 |
! oct3 do 200 i=1,len |
| 65 |
! oct3 |
| 66 |
! oct3 tdif = buoybase(i) |
| 67 |
! oct3 ath1 = th(i,1) |
| 68 |
! oct3 ath = th(i,icb(i)-1) - dttrig |
| 69 |
! oct3 |
| 70 |
! oct3 if (tdif.lt.dtcrit .or. ath.gt.ath1) then |
| 71 |
! oct3 do 60 k=1,nl |
| 72 |
! oct3 sig(i,k) = beta*sig(i,k) - 2.*alpha*tdif*tdif |
| 73 |
! oct3 sig(i,k) = AMAX1(sig(i,k),0.0) |
| 74 |
! oct3 w0(i,k) = beta*w0(i,k) |
| 75 |
! oct3 60 continue |
| 76 |
! oct3 iflag(i)=4 ! pour version vectorisee |
| 77 |
! oct3c convect3 iflag(i)=0 |
| 78 |
! oct3cccc return |
| 79 |
! oct3 endif |
| 80 |
! oct3 |
| 81 |
! oct3200 continue |
| 82 |
|
| 83 |
! -- oct3: on reecrit la boucle 200 (pour la vectorisation) |
| 84 |
|
| 85 |
do 60 k=1,nl |
| 86 |
do 200 i=1,len |
| 87 |
|
| 88 |
tdif = buoybase(i) |
| 89 |
ath1 = th(i,1) |
| 90 |
ath = th(i,icb(i)-1) - dttrig |
| 91 |
|
| 92 |
if (tdif.lt.dtcrit .or. ath.gt.ath1) then |
| 93 |
sig(i,k) = beta*sig(i,k) - 2.*alpha*tdif*tdif |
| 94 |
sig(i,k) = AMAX1(sig(i,k),0.0) |
| 95 |
w0(i,k) = beta*w0(i,k) |
| 96 |
iflag(i)=4 ! pour version vectorisee |
| 97 |
! convect3 iflag(i)=0 |
| 98 |
endif |
| 99 |
|
| 100 |
200 continue |
| 101 |
60 continue |
| 102 |
|
| 103 |
! fin oct3 -- |
| 104 |
|
| 105 |
return |
| 106 |
end |
Parent Directory
| 
Revision Log