phylmd/CV30_routines/cv30_param.f

module cv30_param_m

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

  ! Parameters for Emanuel convection scheme:
  ! - microphysical parameters
  ! - parameters that control the rate of approach to quasi-equilibrium

  USE dimphy, ONLY: klev

  implicit none

  integer minorig ! first level of convection

  integer, parameter:: nl = klev - 1
  ! Limit for convection. The maximum number of levels to which
  ! convection can penetrate, plus 1.  nl must be <= KLEV-1.

  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

  private klev

contains

  SUBROUTINE cv30_param(delt)

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

    ! Set parameters for Emanuel convection scheme

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

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

    ! Limit levels for convection:
    minorig = 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 cv30_param

end module cv30_param_m
1	guez	185	module cv30_param_m
2	guez	3
3	guez	97	! From LMDZ4/libf/phylmd/cvparam3.h, version 1.1.1.1, 2004/05/19 12:53:09
4	guez	3
5	guez	182	! Parameters for Emanuel convection scheme:
6	guez	69	! - microphysical parameters
7			! - parameters that control the rate of approach to quasi-equilibrium
8	guez	3
9	guez	187	USE dimphy, ONLY: klev
10
11	guez	69	implicit none
12	guez	3
13	guez	69	integer minorig ! first level of convection
14	guez	187
15			integer, parameter:: nl = klev - 1
16			! Limit for convection. The maximum number of levels to which
17			! convection can penetrate, plus 1. nl must be <= KLEV-1.
18
19	guez	69	real sigd ! FRACTIONAL AREA COVERED BY UNSATURATED DNDRAFT
20			real spfac ! FRACTION OF PRECIPITATION FALLING OUTSIDE OF CLOUD
21	guez	3
22	guez	69	real pbcrit
23			! CRITICAL CLOUD DEPTH (MB) BENEATH WHICH THE PRECIPITATION
24			! EFFICIENCY IS ASSUMED TO BE ZERO
25	guez	3
26	guez	69	real ptcrit
27			! CLOUD DEPTH (MB) ABOVE WHICH THE PRECIPitation EFFICIENCY IS
28			! ASSUMED TO BE UNITY
29	guez	3
30	guez	69	real omtrain
31			real dtovsh, dpbase, dttrig
32	guez	3
33	guez	69	real dtcrit
34			! CRITICAL BUOYANCY (K) USED TO ADJUST THE APPROACH TO
35			! QUASI-EQUILIBRIUM. IT MUST BE LESS THAN 0.
36	guez	3
37	guez	69	real beta, alpha
38			! PARAMETERS THAT CONTROL THE RATE OF APPROACH TO QUASI-EQUILIBRIUM
39			! (THEIR STANDARD VALUES ARE 1.0 AND 0.96, RESPECTIVELY) (BETA MUST
40			! BE LESS THAN OR EQUAL TO 1)
41	guez	3
42	guez	69	real tau ! CHARACTERISTIC TIMESCALE USED TO COMPUTE ALPHA and BETA
43			real delta
44			real betad
45	guez	3
46	guez	187	private klev
47
48	guez	69	contains
49	guez	3
50	guez	186	SUBROUTINE cv30_param(delt)
51	guez	3
52	guez	97	! From LMDZ4/libf/phylmd/cv3_routines.F, version 1.5, 2005/07/11 15:20:02
53	guez	3
54	guez	182	! Set parameters for Emanuel convection scheme
55	guez	3
56	guez	69	real, intent(in):: delt ! timestep (seconds)
57	guez	3
58	guez	69	!------------------------------------------------------------
59	guez	3
60	guez	69	! Limit levels for convection:
61			minorig = 1
62	guez	3
63	guez	69	! "Microphysical" parameters:
64
65			sigd = 0.01
66			spfac = 0.15
67			pbcrit = 150.0
68			ptcrit = 500.0
69			! cf. FH epmax = 0.993
70
71			omtrain = 45.0 ! used also for snow (no distinction rain/snow)
72
73			! Misc:
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			dtcrit = -2.0
80			tau = 8000.
81			beta = 1.0 - delt/tau
82			alpha = 1.5E-3 * delt/tau
83			! Increase alpha to compensate W decrease:
84			alpha = alpha*1.5
85
86			! Interface cloud parameterization:
87			delta=0.01 ! cld
88
89			! Interface with boundary-layer (gust factor): (sb)
90			betad=10.0 ! original value (from convect 4.3)
91
92	guez	185	end SUBROUTINE cv30_param
93	guez	69
94	guez	185	end module cv30_param_m