phylmd/CV3_routines/cv3_param.f

module cv3_param_m

  ! From LMDZ4/libf/phylmd/cvparam3.h, version 1.1.1.1, 2004/05/19 12:53:09

  ! Parameters for iflag_con = 3:
  ! - microphysical parameters
  ! - parameters that control the rate of approach to quasi-equilibrium

  implicit none

  integer noff ! integer limit for convection (nd - noff)
  integer minorig ! first level of convection
  integer nl, nlp, nlm
  real sigd ! FRACTIONAL AREA COVERED BY UNSATURATED DNDRAFT 
  real spfac ! FRACTION OF PRECIPITATION FALLING OUTSIDE OF CLOUD 

  real pbcrit
  !  CRITICAL CLOUD DEPTH (MB) BENEATH WHICH THE PRECIPITATION
  ! EFFICIENCY IS ASSUMED TO BE ZERO

  real ptcrit
  ! CLOUD DEPTH (MB) ABOVE WHICH THE PRECIPitation EFFICIENCY IS
  ! ASSUMED TO BE UNITY

  real omtrain
  real dtovsh, dpbase, dttrig

  real dtcrit
  ! CRITICAL BUOYANCY (K) USED TO ADJUST THE APPROACH TO
  ! QUASI-EQUILIBRIUM. IT MUST BE LESS THAN 0.

  real beta, alpha
  ! PARAMETERS THAT CONTROL THE RATE OF APPROACH TO QUASI-EQUILIBRIUM
  ! (THEIR STANDARD VALUES ARE 1.0 AND 0.96, RESPECTIVELY) (BETA MUST
  ! BE LESS THAN OR EQUAL TO 1)

  real tau ! CHARACTERISTIC TIMESCALE USED TO COMPUTE ALPHA and BETA
  real delta
  real betad

contains

  SUBROUTINE cv3_param(nd, delt)

    ! From LMDZ4/libf/phylmd/cv3_routines.F, version 1.5, 2005/07/11 15:20:02

    ! Set parameters for iflag_con = 3

    integer, intent(in):: nd
    real, intent(in):: delt ! timestep (seconds)

    !------------------------------------------------------------

    ! Limit levels for convection:

    noff = 1
    minorig = 1
    nl = nd - noff
    nlp=nl+1
    nlm=nl-1

    ! "Microphysical" parameters:

    sigd = 0.01
    spfac = 0.15
    pbcrit = 150.0
    ptcrit = 500.0
    ! cf. FH epmax = 0.993

    omtrain = 45.0 ! used also for snow (no distinction rain/snow)

    ! Misc:

    dtovsh = -0.2 ! dT for overshoot
    dpbase = -40. ! definition cloud base (400m above LCL)
    dttrig = 5. ! (loose) condition for triggering

    ! Rate of approach to quasi-equilibrium:

    dtcrit = -2.0
    tau = 8000.
    beta = 1.0 - delt/tau
    alpha = 1.5E-3 * delt/tau
    ! Increase alpha to compensate W decrease:
    alpha = alpha*1.5

    ! Interface cloud parameterization:

    delta=0.01 ! cld

    ! Interface with boundary-layer (gust factor): (sb)

    betad=10.0 ! original value (from convect 4.3)

  end SUBROUTINE cv3_param

end module cv3_param_m
1	module cv3_param_m
2
3	! From LMDZ4/libf/phylmd/cvparam3.h, version 1.1.1.1, 2004/05/19 12:53:09
4
5	! Parameters for iflag_con = 3:
6	! - microphysical parameters
7	! - parameters that control the rate of approach to quasi-equilibrium
8
9	implicit none
10
11	integer noff ! integer limit for convection (nd - noff)
12	integer minorig ! first level of convection
13	integer nl, nlp, nlm
14	real sigd ! FRACTIONAL AREA COVERED BY UNSATURATED DNDRAFT
15	real spfac ! FRACTION OF PRECIPITATION FALLING OUTSIDE OF CLOUD
16
17	real pbcrit
18	! CRITICAL CLOUD DEPTH (MB) BENEATH WHICH THE PRECIPITATION
19	! EFFICIENCY IS ASSUMED TO BE ZERO
20
21	real ptcrit
22	! CLOUD DEPTH (MB) ABOVE WHICH THE PRECIPitation EFFICIENCY IS
23	! ASSUMED TO BE UNITY
24
25	real omtrain
26	real dtovsh, dpbase, dttrig
27
28	real dtcrit
29	! CRITICAL BUOYANCY (K) USED TO ADJUST THE APPROACH TO
30	! QUASI-EQUILIBRIUM. IT MUST BE LESS THAN 0.
31
32	real beta, alpha
33	! PARAMETERS THAT CONTROL THE RATE OF APPROACH TO QUASI-EQUILIBRIUM
34	! (THEIR STANDARD VALUES ARE 1.0 AND 0.96, RESPECTIVELY) (BETA MUST
35	! BE LESS THAN OR EQUAL TO 1)
36
37	real tau ! CHARACTERISTIC TIMESCALE USED TO COMPUTE ALPHA and BETA
38	real delta
39	real betad
40
41	contains
42
43	SUBROUTINE cv3_param(nd, delt)
44
45	! From LMDZ4/libf/phylmd/cv3_routines.F, version 1.5, 2005/07/11 15:20:02
46
47	! Set parameters for iflag_con = 3
48
49	integer, intent(in):: nd
50	real, intent(in):: delt ! timestep (seconds)
51
52	!------------------------------------------------------------
53
54	! Limit levels for convection:
55
56	noff = 1
57	minorig = 1
58	nl = nd - noff
59	nlp=nl+1
60	nlm=nl-1
61
62	! "Microphysical" parameters:
63
64	sigd = 0.01
65	spfac = 0.15
66	pbcrit = 150.0
67	ptcrit = 500.0
68	! cf. FH epmax = 0.993
69
70	omtrain = 45.0 ! used also for snow (no distinction rain/snow)
71
72	! Misc:
73
74	dtovsh = -0.2 ! dT for overshoot
75	dpbase = -40. ! definition cloud base (400m above LCL)
76	dttrig = 5. ! (loose) condition for triggering
77
78	! Rate of approach to quasi-equilibrium:
79
80	dtcrit = -2.0
81	tau = 8000.
82	beta = 1.0 - delt/tau
83	alpha = 1.5E-3 * delt/tau
84	! Increase alpha to compensate W decrease:
85	alpha = alpha*1.5
86
87	! Interface cloud parameterization:
88
89	delta=0.01 ! cld
90
91	! Interface with boundary-layer (gust factor): (sb)
92
93	betad=10.0 ! original value (from convect 4.3)
94
95	end SUBROUTINE cv3_param
96
97	end module cv3_param_m