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 |
195 |
SUBROUTINE cv30_trigger(icb1, plcl1, p1, th1, tv1, tvp1, pbase1, buoybase1, & |
8 |
|
|
iflag1, sig1, w01) |
9 |
guez |
47 |
|
10 |
guez |
195 |
! Triggering: |
11 |
guez |
189 |
! - computes the cloud base |
12 |
|
|
! - triggering (crude in this version) |
13 |
guez |
195 |
! - relaxation of sig1 and w01 when no convection |
14 |
guez |
47 |
|
15 |
guez |
195 |
! Caution 1: if no convection, we set iflag1 = 4 |
16 |
guez |
47 |
|
17 |
guez |
195 |
! Caution 2: at this stage, tvp1 (and thus buoy) are known up |
18 |
|
|
! through icb1 only! -> the buoyancy below cloud base not (yet) |
19 |
|
|
! set to the cloud base buoyancy |
20 |
guez |
47 |
|
21 |
guez |
195 |
use cv30_param_m, only: alpha, beta, dtcrit, nl |
22 |
|
|
USE dimphy, ONLY: klev, klon |
23 |
guez |
189 |
|
24 |
guez |
195 |
integer, intent(in):: icb1(klon) |
25 |
|
|
real, intent(in):: plcl1(klon), p1(klon, klev) |
26 |
|
|
real, intent(in):: th1(klon, klev), tv1(klon, klev), tvp1(klon, klev) |
27 |
guez |
189 |
|
28 |
guez |
195 |
real, intent(out):: pbase1(klon), buoybase1(klon) |
29 |
guez |
189 |
|
30 |
guez |
195 |
integer, intent(inout):: iflag1(klon) |
31 |
|
|
real, intent(inout):: sig1(klon, klev), w01(klon, klev) |
32 |
guez |
189 |
|
33 |
guez |
195 |
! Local: |
34 |
|
|
real, parameter:: dttrig = 5. ! (loose) condition for triggering |
35 |
|
|
real, parameter:: dpbase = - 40. ! definition cloud base (400 m above LCL) |
36 |
guez |
189 |
integer i, k |
37 |
guez |
195 |
real tvpbase, tvbase |
38 |
guez |
189 |
|
39 |
|
|
!--------------------------------------------------------------------- |
40 |
|
|
|
41 |
guez |
195 |
! Set cloud base buoyancy at plcl1 + dpbase level buoyancy: |
42 |
|
|
do i = 1, klon |
43 |
|
|
pbase1(i) = plcl1(i) + dpbase |
44 |
|
|
tvpbase = tvp1(i, icb1(i)) * (pbase1(i) - p1(i, icb1(i) + 1)) & |
45 |
|
|
/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) & |
46 |
|
|
+ tvp1(i, icb1(i) + 1) * (p1(i, icb1(i)) - pbase1(i)) & |
47 |
|
|
/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) |
48 |
|
|
tvbase = tv1(i, icb1(i)) * (pbase1(i) - p1(i, icb1(i) + 1)) & |
49 |
|
|
/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) & |
50 |
|
|
+ tv1(i, icb1(i) + 1) * (p1(i, icb1(i)) - pbase1(i)) & |
51 |
|
|
/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) |
52 |
|
|
buoybase1(i) = tvpbase - tvbase |
53 |
guez |
189 |
end do |
54 |
guez |
47 |
|
55 |
guez |
189 |
! Make sure that column is dry adiabatic between the surface and |
56 |
|
|
! cloud base, and that lifted air is positively buoyant at cloud |
57 |
guez |
195 |
! base. If not, return to calling program after resetting sig1(i) |
58 |
|
|
! and w01(i). |
59 |
|
|
do k = 1, nl |
60 |
|
|
do i = 1, klon |
61 |
|
|
if (buoybase1(i) < dtcrit .or. th1(i, icb1(i) - 1) - dttrig & |
62 |
|
|
> th1(i, 1)) then |
63 |
|
|
sig1(i, k) = MAX(beta * sig1(i, k) - 2. * alpha & |
64 |
|
|
* buoybase1(i)**2, 0.) |
65 |
|
|
w01(i, k) = beta * w01(i, k) |
66 |
|
|
iflag1(i) = 4 |
67 |
guez |
189 |
endif |
68 |
|
|
end do |
69 |
|
|
end do |
70 |
guez |
47 |
|
71 |
guez |
189 |
end SUBROUTINE cv30_trigger |
72 |
guez |
47 |
|
73 |
guez |
189 |
end module cv30_trigger_m |