--- trunk/Sources/phylmd/CV30_routines/cv30_param.f	2016/05/12 13:00:07	192
+++ trunk/Sources/phylmd/CV30_routines/cv30_param.f	2016/06/06 17:42:15	201
@@ -2,92 +2,57 @@
 
   ! 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
+  ! Set parameters for Emanuel convection scheme. Includes
+  ! microphysical parameters and parameters that control the rate of
+  ! approach to quasi-equilibrium.
 
   USE dimphy, ONLY: klev
 
   implicit none
 
-  integer minorig ! first level of convection
+  integer, parameter:: minorig = 1 
+  ! first level of convection (limit levels for convection)
 
   integer, parameter:: nl = klev - 1
   ! Limit for convection. The maximum number of levels to which
-  ! convection can penetrate, plus 1. We should have: 2 <= nl <= 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.
+  ! convection can penetrate, plus 1. We should have:
+  ! 6 <= nl <= KLEV - 1
+  ! (because of locate in cv30_feed).
+
+  real, parameter:: sigd = 0.01 
+  ! fractional area covered by unsaturated downdraft
+  ! \sigma_d in Emanuel (1991 928)
+
+  real, parameter:: dtcrit = - 2.
+  ! Critical buoyancy (K) used to adjust the approach to
+  ! quasi-equilibrium. It must be < 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
+  ! Parameters that control the rate of approach to quasi-equilibrium
+  ! (their standard values are 1. and 0.96, respectively) (beta must
+  ! be less than or equal to 1).
 
   private klev
 
 contains
 
-  SUBROUTINE cv30_param(delt)
+  SUBROUTINE cv30_param
 
     ! From LMDZ4/libf/phylmd/cv3_routines.F, version 1.5, 2005/07/11 15:20:02
 
-    ! Set parameters for Emanuel convection scheme
+    use comconst, only: dtphys
 
-    real, intent(in):: delt ! timestep (seconds)
+    ! Local:
 
-    !------------------------------------------------------------
-
-    ! Limit levels for convection:
-    minorig = 1
+    real, parameter:: tau = 8000.
+    ! characteristic timescale used to compute alpha and beta
 
-    ! "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
+    beta = 1. - dtphys / tau
 
-    ! Interface with boundary-layer (gust factor): (sb)
-    betad=10.0 ! original value (from convect 4.3)
+    alpha = 1.5E-3 * dtphys / tau * 1.5
+    ! factor 1.5: increase alpha to compensate W decrease
 
   end SUBROUTINE cv30_param