| 1 |
guez |
189 |
module cv30_trigger_m |
| 2 |
guez |
47 |
|
| 3 |
guez |
189 |
implicit none |
| 4 |
guez |
47 |
|
| 5 |
guez |
189 |
contains |
| 6 |
guez |
47 |
|
| 7 |
guez |
189 |
SUBROUTINE cv30_trigger(len, nd, icb, plcl, p, th, tv, tvp, pbase, buoybase, & |
| 8 |
|
|
iflag, sig, w0) |
| 9 |
guez |
47 |
|
| 10 |
guez |
189 |
! TRIGGERING |
| 11 |
guez |
47 |
|
| 12 |
guez |
189 |
! - computes the cloud base |
| 13 |
|
|
! - triggering (crude in this version) |
| 14 |
|
|
! - relaxation of sig and w0 when no convection |
| 15 |
guez |
47 |
|
| 16 |
guez |
189 |
! Caution 1: if no convection, we set iflag=4 |
| 17 |
|
|
! (it used to be 0 in convect3) |
| 18 |
guez |
47 |
|
| 19 |
guez |
189 |
! Caution 2: at this stage, tvp (and thus buoy) are known up |
| 20 |
|
|
! through icb only! |
| 21 |
|
|
! -> the buoyancy below cloud base not (yet) set to the cloud base buoyancy |
| 22 |
guez |
47 |
|
| 23 |
guez |
189 |
use cv30_param_m, only: alpha, beta, dpbase, dtcrit, dttrig, nl |
| 24 |
|
|
|
| 25 |
|
|
! input: |
| 26 |
|
|
integer, intent(in):: len, nd |
| 27 |
|
|
integer icb(len) |
| 28 |
|
|
real, intent(in):: plcl(len), p(len, nd) |
| 29 |
|
|
real th(len, nd), tv(len, nd), tvp(len, nd) |
| 30 |
|
|
|
| 31 |
|
|
! output: |
| 32 |
|
|
real pbase(len), buoybase(len) |
| 33 |
|
|
|
| 34 |
|
|
! input AND output: |
| 35 |
|
|
integer iflag(len) |
| 36 |
|
|
real, intent(inout):: sig(len, nd), w0(len, nd) |
| 37 |
|
|
|
| 38 |
|
|
! local variables: |
| 39 |
|
|
integer i, k |
| 40 |
|
|
real tvpbase, tvbase, tdif, ath, ath1 |
| 41 |
|
|
|
| 42 |
|
|
!--------------------------------------------------------------------- |
| 43 |
|
|
|
| 44 |
|
|
! set cloud base buoyancy at (plcl+dpbase) level buoyancy |
| 45 |
|
|
|
| 46 |
|
|
do i=1, len |
| 47 |
guez |
47 |
pbase(i) = plcl(i) + dpbase |
| 48 |
guez |
189 |
tvpbase = tvp(i, icb(i))*(pbase(i)-p(i, icb(i)+1)) & |
| 49 |
|
|
/(p(i, icb(i))-p(i, icb(i)+1)) & |
| 50 |
|
|
+ tvp(i, icb(i)+1)*(p(i, icb(i))-pbase(i)) & |
| 51 |
|
|
/(p(i, icb(i))-p(i, icb(i)+1)) |
| 52 |
|
|
tvbase = tv(i, icb(i))*(pbase(i)-p(i, icb(i)+1)) & |
| 53 |
|
|
/(p(i, icb(i))-p(i, icb(i)+1)) & |
| 54 |
|
|
+ tv(i, icb(i)+1)*(p(i, icb(i))-pbase(i)) & |
| 55 |
|
|
/(p(i, icb(i))-p(i, icb(i)+1)) |
| 56 |
guez |
47 |
buoybase(i) = tvpbase - tvbase |
| 57 |
guez |
189 |
end do |
| 58 |
guez |
47 |
|
| 59 |
guez |
189 |
! Make sure that column is dry adiabatic between the surface and |
| 60 |
|
|
! cloud base, and that lifted air is positively buoyant at cloud |
| 61 |
|
|
! base. If not, return to calling program after resetting sig(i) |
| 62 |
|
|
! and w0(i). |
| 63 |
guez |
47 |
|
| 64 |
guez |
189 |
do k=1, nl |
| 65 |
|
|
do i=1, len |
| 66 |
|
|
tdif = buoybase(i) |
| 67 |
|
|
ath1 = th(i, 1) |
| 68 |
|
|
ath = th(i, icb(i)-1) - dttrig |
| 69 |
guez |
47 |
|
| 70 |
guez |
189 |
if (tdif < dtcrit .or. ath > ath1) then |
| 71 |
|
|
sig(i, k) = beta*sig(i, k) - 2.*alpha*tdif*tdif |
| 72 |
|
|
sig(i, k) = AMAX1(sig(i, k), 0.0) |
| 73 |
|
|
w0(i, k) = beta*w0(i, k) |
| 74 |
|
|
iflag(i)=4 ! pour version vectorisee |
| 75 |
|
|
endif |
| 76 |
|
|
end do |
| 77 |
|
|
end do |
| 78 |
guez |
47 |
|
| 79 |
guez |
189 |
end SUBROUTINE cv30_trigger |
| 80 |
guez |
47 |
|
| 81 |
guez |
189 |
end module cv30_trigger_m |
Parent Directory
| 
Revision Log