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module cv3_param_m |
module cv30_param_m |
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! From LMDZ4/libf/phylmd/cvparam3.h, version 1.1.1.1 2004/05/19 12:53:09 |
! From LMDZ4/libf/phylmd/cvparam3.h, version 1.1.1.1, 2004/05/19 12:53:09 |
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! Parameters for iflag_con=3: |
! Set parameters for Emanuel convection scheme. Includes |
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! - microphysical parameters |
! microphysical parameters and parameters that control the rate of |
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! - parameters that control the rate of approach to quasi-equilibrium |
! approach to quasi-equilibrium. |
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implicit none |
USE dimphy, ONLY: klev |
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integer noff ! integer limit for convection (nd - noff) |
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integer minorig ! first level of convection |
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integer nl, nlp, nlm |
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real sigd ! FRACTIONAL AREA COVERED BY UNSATURATED DNDRAFT |
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real spfac ! FRACTION OF PRECIPITATION FALLING OUTSIDE OF CLOUD |
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real pbcrit |
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! CRITICAL CLOUD DEPTH (MB) BENEATH WHICH THE PRECIPITATION |
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! EFFICIENCY IS ASSUMED TO BE ZERO |
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real ptcrit |
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! CLOUD DEPTH (MB) ABOVE WHICH THE PRECIPitation EFFICIENCY IS |
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! ASSUMED TO BE UNITY |
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real omtrain |
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real dtovsh, dpbase, dttrig |
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real dtcrit |
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! CRITICAL BUOYANCY (K) USED TO ADJUST THE APPROACH TO |
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! QUASI-EQUILIBRIUM. IT MUST BE LESS THAN 0. |
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real beta, alpha |
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! PARAMETERS THAT CONTROL THE RATE OF APPROACH TO QUASI-EQUILIBRIUM |
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! (THEIR STANDARD VALUES ARE 1.0 AND 0.96, RESPECTIVELY) (BETA MUST |
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! BE LESS THAN OR EQUAL TO 1) |
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real tau ! CHARACTERISTIC TIMESCALE USED TO COMPUTE ALPHA and BETA |
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real delta |
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real betad |
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contains |
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SUBROUTINE cv3_param(nd, delt) |
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! From LMDZ4/libf/phylmd/cv3_routines.F, version 1.5 2005/07/11 15:20:02 |
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! Set parameters for iflag_con = 3 |
implicit none |
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integer, intent(in):: nd |
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real, intent(in):: delt ! timestep (seconds) |
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!------------------------------------------------------------ |
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! Limit levels for convection: |
integer, parameter:: minorig = 1 |
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! first level of convection (limit levels for convection) |
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noff = 1 |
integer, parameter:: nl = klev - 1 |
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minorig = 1 |
! Limit for convection. The maximum number of levels to which |
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nl=nd-noff |
! convection can penetrate, plus 1. We should have: |
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nlp=nl+1 |
! 6 <= nl <= KLEV - 1 |
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nlm=nl-1 |
! (because of locate in cv30_feed). |
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real, parameter:: sigd = 0.01 |
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! fractional area covered by unsaturated downdraft |
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! \sigma_d in Emanuel (1991 928) |
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real, parameter:: dtcrit = - 2. |
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! Critical buoyancy (K) used to adjust the approach to |
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! quasi-equilibrium. It must be < 0. |
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! "Microphysical" parameters: |
real beta, alpha |
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! Parameters that control the rate of approach to quasi-equilibrium |
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! (their standard values are 1. and 0.96, respectively) (beta must |
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! be less than or equal to 1). |
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sigd = 0.01 |
private klev |
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spfac = 0.15 |
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pbcrit = 150.0 |
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ptcrit = 500.0 |
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! cf. FH epmax = 0.993 |
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omtrain = 45.0 ! used also for snow (no distinction rain/snow) |
contains |
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! Misc: |
SUBROUTINE cv30_param |
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dtovsh = -0.2 ! dT for overshoot |
! From LMDZ4/libf/phylmd/cv3_routines.F, version 1.5, 2005/07/11 15:20:02 |
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dpbase = -40. ! definition cloud base (400m above LCL) |
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dttrig = 5. ! (loose) condition for triggering |
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! Rate of approach to quasi-equilibrium: |
use comconst, only: dtphys |
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dtcrit = -2.0 |
! Local: |
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tau = 8000. |
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beta = 1.0 - delt/tau |
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alpha = 1.5E-3 * delt/tau |
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! Increase alpha to compensate W decrease: |
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alpha = alpha*1.5 |
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! Interface cloud parameterization: |
real, parameter:: tau = 8000. |
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! characteristic timescale used to compute alpha and beta |
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delta=0.01 ! cld |
!------------------------------------------------------------ |
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! Interface with boundary-layer (gust factor): (sb) |
beta = 1. - dtphys / tau |
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betad=10.0 ! original value (from convect 4.3) |
alpha = 1.5E-3 * dtphys / tau * 1.5 |
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! factor 1.5: increase alpha to compensate W decrease |
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end SUBROUTINE cv3_param |
end SUBROUTINE cv30_param |
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end module cv3_param_m |
end module cv30_param_m |
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