source: palm/trunk/SOURCE/compute_vpt.f90 @ 3421

Last change on this file since 3421 was 3274, checked in by knoop, 3 years ago

Modularization of all bulk cloud physics code components

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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 1997-2018 Leibniz Universitaet Hannover
18!------------------------------------------------------------------------------!
19!
20! Current revisions:
21! -----------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: compute_vpt.f90 3274 2018-09-24 15:42:55Z gronemeier $
27! Modularization of all bulk cloud physics code components
28!
29! 2718 2018-01-02 08:49:38Z maronga
30! Corrected "Former revisions" section
31!
32! 2696 2017-12-14 17:12:51Z kanani
33! Change in file header (GPL part)
34!
35! 2101 2017-01-05 16:42:31Z suehring
36!
37! 2000 2016-08-20 18:09:15Z knoop
38! Forced header and separation lines into 80 columns
39!
40! 1682 2015-10-07 23:56:08Z knoop
41! Code annotations made doxygen readable
42!
43! 1353 2014-04-08 15:21:23Z heinze
44! REAL constants provided with KIND-attribute
45!
46! 1320 2014-03-20 08:40:49Z raasch
47! ONLY-attribute added to USE-statements,
48! kind-parameters added to all INTEGER and REAL declaration statements,
49! kinds are defined in new module kinds,
50! revision history before 2012 removed,
51! comment fields (!:) to be used for variable explanations added to
52! all variable declaration statements
53!
54! 1036 2012-10-22 13:43:42Z raasch
55! code put under GPL (PALM 3.9)
56!
57! 803 2012-01-16 15:48:46Z franke
58! Bugfix: wrong factor in calculation of vpt in case of cloud droplets
59!
60! Revision 1.1  2000/04/13 14:40:53  schroeter
61! Initial revision
62!
63!
64! Description:
65! -------------
66!> Computation of the virtual potential temperature
67!------------------------------------------------------------------------------!
68 SUBROUTINE compute_vpt
69 
70
71    USE arrays_3d,                                                             &
72        ONLY:  pt, q, ql, vpt, d_exner
73
74    USE basic_constants_and_equations_mod,                                     &
75        ONLY:  lv_d_cp
76
77    USE control_parameters,                                                    &
78        ONLY:  cloud_droplets
79
80    USE indices,                                                               &
81        ONLY:  nzb, nzt
82
83    USE kinds
84
85    USE bulk_cloud_model_mod,                                                  &
86        ONLY:  bulk_cloud_model
87
88    IMPLICIT NONE
89
90    INTEGER(iwp) :: k   !<
91
92    IF ( .NOT. bulk_cloud_model  .AND.  .NOT. cloud_droplets )  THEN
93       vpt = pt * ( 1.0_wp + 0.61_wp * q )
94    ELSE IF (bulk_cloud_model)  THEN
95       DO  k = nzb, nzt+1
96          vpt(k,:,:) = ( pt(k,:,:) + d_exner(k) * lv_d_cp * ql(k,:,:) ) *      &
97                       ( 1.0_wp + 0.61_wp * q(k,:,:) - 1.61_wp * ql(k,:,:) ) 
98       ENDDO
99    ELSE
100       vpt = pt * ( 1.0_wp + 0.61_wp * q - ql ) 
101    ENDIF
102
103 END SUBROUTINE compute_vpt
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