source: LMDZ6/trunk/libf/phylmd/cosp2/cosp_utils.F90 @ 3358

Last change on this file since 3358 was 3358, checked in by idelkadi, 6 years ago

Implementation de la nouvelle version COSPv2 dans LMDZ.
Pour compiler avec makelmdz_fcma utiliser l'option "-cosp2 true"

File size: 4.2 KB
Line 
1! %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2! Copyright (c) 2015, Regents of the University of Colorado
3! All rights reserved.
4!
5! Redistribution and use in source and binary forms, with or without modification, are
6! permitted provided that the following conditions are met:
7!
8! 1. Redistributions of source code must retain the above copyright notice, this list of
9!    conditions and the following disclaimer.
10!
11! 2. Redistributions in binary form must reproduce the above copyright notice, this list
12!    of conditions and the following disclaimer in the documentation and/or other
13!    materials provided with the distribution.
14!
15! 3. Neither the name of the copyright holder nor the names of its contributors may be
16!    used to endorse or promote products derived from this software without specific prior
17!    written permission.
18!
19! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
20! EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21! MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
22! THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
24! OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26! LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27! OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28!
29! History:
30! Jul 2007 - A. Bodas-Salcedo - Initial version
31! May 2015 - Dustin Swales    - Modified for COSPv2.0
32!
33! %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
34MODULE MOD_COSP_UTILS
35  USE COSP_KINDS, ONLY: wp
36  USE MOD_COSP_CONFIG
37  IMPLICIT NONE
38
39CONTAINS
40!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
41!------------------- SUBROUTINE COSP_PRECIP_MXRATIO --------------
42!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
43SUBROUTINE COSP_PRECIP_MXRATIO(Npoints,Nlevels,Ncolumns,p,T,prec_frac,prec_type, &
44                          n_ax,n_bx,alpha_x,c_x,d_x,g_x,a_x,b_x,gamma1,gamma2,gamma3,gamma4, &
45                          flux,mxratio,reff)
46
47    ! Input arguments, (IN)
48    integer,intent(in) :: Npoints,Nlevels,Ncolumns
49    real(wp),intent(in),dimension(Npoints,Nlevels) :: p,T,flux
50    real(wp),intent(in),dimension(Npoints,Ncolumns,Nlevels) :: prec_frac
51    real(wp),intent(in) :: n_ax,n_bx,alpha_x,c_x,d_x,g_x,a_x,b_x,gamma1,gamma2,gamma3,gamma4,prec_type
52    ! Input arguments, (OUT)
53    real(wp),intent(out),dimension(Npoints,Ncolumns,Nlevels) :: mxratio
54    real(wp),intent(inout),dimension(Npoints,Ncolumns,Nlevels) :: reff
55    ! Local variables
56    integer :: i,j,k
57    real(wp) :: sigma,one_over_xip1,xi,rho0,rho,lambda_x,gamma_4_3_2,delta
58   
59    mxratio = 0.0
60
61    if (n_ax >= 0.0) then ! N_ax is used to control which hydrometeors need to be computed
62        xi      = d_x/(alpha_x + b_x - n_bx + 1._wp)
63        rho0    = 1.29_wp
64        sigma   = (gamma2/(gamma1*c_x))*(n_ax*a_x*gamma2)**xi
65        one_over_xip1 = 1._wp/(xi + 1._wp)
66        gamma_4_3_2 = 0.5_wp*gamma4/gamma3
67        delta = (alpha_x + b_x + d_x - n_bx + 1._wp)
68       
69        do k=1,Nlevels
70            do j=1,Ncolumns
71                do i=1,Npoints
72                    if ((prec_frac(i,j,k)==prec_type).or.(prec_frac(i,j,k)==3.)) then
73                        rho = p(i,k)/(287.05_wp*T(i,k))
74                        mxratio(i,j,k)=(flux(i,k)*((rho/rho0)**g_x)*sigma)**one_over_xip1
75                        mxratio(i,j,k)=mxratio(i,j,k)/rho
76                        ! Compute effective radius
77                        if ((reff(i,j,k) <= 0._wp).and.(flux(i,k) /= 0._wp)) then
78                           lambda_x = (a_x*c_x*((rho0/rho)**g_x)*n_ax*gamma1/flux(i,k))**(1._wp/delta)
79                           reff(i,j,k) = gamma_4_3_2/lambda_x
80                        endif
81                    endif
82                enddo
83            enddo
84        enddo
85    endif
86END SUBROUTINE COSP_PRECIP_MXRATIO
87
88
89END MODULE MOD_COSP_UTILS
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