source: palm/trunk/SOURCE/compute_vpt.f90 @ 2696

Last change on this file since 2696 was 2696, checked in by kanani, 3 years ago

Merge of branch palm4u into trunk

  • Property svn:keywords set to Id
File size: 2.9 KB
Line 
1!> @file compute_vpt.f90
2!------------------------------------------------------------------------------!
3! This file is part of the PALM model system.
4!
5! PALM is free software: you can redistribute it and/or modify it under the
6! terms of the GNU General Public License as published by the Free Software
7! Foundation, either version 3 of the License, or (at your option) any later
8! version.
9!
10! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13!
14! You should have received a copy of the GNU General Public License along with
15! PALM. If not, see <http://www.gnu.org/licenses/>.
16!
17! Copyright 1997-2017 Leibniz Universitaet Hannover
18!------------------------------------------------------------------------------!
19!
20! Current revisions:
21! -----------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: compute_vpt.f90 2696 2017-12-14 17:12:51Z kanani $
27!
28! 2000 2016-08-20 18:09:15Z knoop
29! Forced header and separation lines into 80 columns
30!
31! 1682 2015-10-07 23:56:08Z knoop
32! Code annotations made doxygen readable
33!
34! 1353 2014-04-08 15:21:23Z heinze
35! REAL constants provided with KIND-attribute
36!
37! 1320 2014-03-20 08:40:49Z raasch
38! ONLY-attribute added to USE-statements,
39! kind-parameters added to all INTEGER and REAL declaration statements,
40! kinds are defined in new module kinds,
41! revision history before 2012 removed,
42! comment fields (!:) to be used for variable explanations added to
43! all variable declaration statements
44!
45! 1036 2012-10-22 13:43:42Z raasch
46! code put under GPL (PALM 3.9)
47!
48! 803 2012-01-16 15:48:46Z franke
49! Bugfix: wrong factor in calculation of vpt in case of cloud droplets
50!
51! Revision 1.1  2000/04/13 14:40:53  schroeter
52! Initial revision
53!
54!
55! Description:
56! -------------
57!> Computation of the virtual potential temperature
58!------------------------------------------------------------------------------!
59 SUBROUTINE compute_vpt
60 
61
62    USE arrays_3d,                                                             &
63        ONLY:  pt, q, ql, vpt
64       
65    USE indices,                                                               &
66        ONLY:  nzb, nzt
67       
68    USE cloud_parameters,                                                      &
69        ONLY:  l_d_cp, pt_d_t
70       
71    USE control_parameters,                                                    &
72        ONLY:  cloud_droplets, cloud_physics
73       
74    USE kinds
75
76    IMPLICIT NONE
77
78    INTEGER(iwp) :: k   !<
79
80    IF ( .NOT. cloud_physics  .AND.  .NOT. cloud_droplets )  THEN
81       vpt = pt * ( 1.0_wp + 0.61_wp * q )
82    ELSE IF (cloud_physics)  THEN
83       DO  k = nzb, nzt+1
84          vpt(k,:,:) = ( pt(k,:,:) + pt_d_t(k) * l_d_cp * ql(k,:,:) ) *        &
85                       ( 1.0_wp + 0.61_wp * q(k,:,:) - 1.61_wp * ql(k,:,:) ) 
86       ENDDO
87    ELSE
88       vpt = pt * ( 1.0_wp + 0.61_wp * q - ql ) 
89    ENDIF
90
91 END SUBROUTINE compute_vpt
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