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module cv30_param_m |
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! $Header: /home/cvsroot/LMDZ4/libf/phylmd/cv3_routines.F,v 1.5 2005/07/11 15:20:02 lmdzadmin Exp $ |
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SUBROUTINE cv3_param(nd,delt) |
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use conema3_m |
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use cvparam3 |
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implicit none |
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!------------------------------------------------------------ |
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! Set parameters for convectL for iflag_con = 3 |
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!------------------------------------------------------------ |
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! |
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! *** PBCRIT IS THE CRITICAL CLOUD DEPTH (MB) BENEATH WHICH THE *** |
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! *** PRECIPITATION EFFICIENCY IS ASSUMED TO BE ZERO *** |
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! *** PTCRIT IS THE CLOUD DEPTH (MB) ABOVE WHICH THE PRECIP. *** |
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! *** EFFICIENCY IS ASSUMED TO BE UNITY *** |
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! *** SIGD IS THE FRACTIONAL AREA COVERED BY UNSATURATED DNDRAFT *** |
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! *** SPFAC IS THE FRACTION OF PRECIPITATION FALLING OUTSIDE *** |
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! *** OF CLOUD *** |
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! |
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! [TAU: CHARACTERISTIC TIMESCALE USED TO COMPUTE ALPHA & BETA] |
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! *** ALPHA AND BETA ARE PARAMETERS THAT CONTROL THE RATE OF *** |
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! *** APPROACH TO QUASI-EQUILIBRIUM *** |
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! *** (THEIR STANDARD VALUES ARE 1.0 AND 0.96, RESPECTIVELY) *** |
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! *** (BETA MUST BE LESS THAN OR EQUAL TO 1) *** |
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! |
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! *** DTCRIT IS THE CRITICAL BUOYANCY (K) USED TO ADJUST THE *** |
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! *** APPROACH TO QUASI-EQUILIBRIUM *** |
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! *** IT MUST BE LESS THAN 0 *** |
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integer nd |
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real, intent(in):: delt ! timestep (seconds) |
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! noff: integer limit for convection (nd-noff) |
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! minorig: First level of convection |
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! -- limit levels for convection: |
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noff = 1 |
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minorig = 1 |
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nl=nd-noff |
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nlp=nl+1 |
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nlm=nl-1 |
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! -- "microphysical" parameters: |
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sigd = 0.01 |
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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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!IM cf. FH epmax = 0.993 |
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omtrain = 45.0 ! used also for snow (no disctinction rain/snow) |
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! -- misc: |
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dtovsh = -0.2 ! dT for overshoot |
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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: |
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dtcrit = -2.0 |
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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: |
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delta=0.01 ! cld |
! From LMDZ4/libf/phylmd/cvparam3.h, version 1.1.1.1, 2004/05/19 12:53:09 |
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! -- interface with boundary-layer (gust factor): (sb) |
! Parameters for Emanuel convection scheme: |
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! - microphysical parameters |
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! - parameters that control the rate of approach to quasi-equilibrium |
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betad=10.0 ! original value (from convect 4.3) |
implicit none |
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return |
integer minorig ! first level of convection |
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end |
integer nl ! limit for convection |
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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 cv30_param(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 Emanuel convection scheme |
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USE dimphy, ONLY: klev |
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real, intent(in):: delt ! timestep (seconds) |
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!------------------------------------------------------------ |
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! Limit levels for convection: |
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minorig = 1 |
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nl = klev - 1 |
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! "Microphysical" parameters: |
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sigd = 0.01 |
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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) |
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! Misc: |
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dtovsh = -0.2 ! dT for overshoot |
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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: |
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dtcrit = -2.0 |
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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: |
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delta=0.01 ! cld |
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! Interface with boundary-layer (gust factor): (sb) |
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betad=10.0 ! original value (from convect 4.3) |
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end SUBROUTINE cv30_param |
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end module cv30_param_m |
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