| 1 | SUBROUTINE compute_vpt |
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| 2 | |
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| 3 | !--------------------------------------------------------------------------------! |
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| 4 | ! This file is part of PALM. |
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| 5 | ! |
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| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 8 | ! either version 3 of the License, or (at your option) any later version. |
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| 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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| 17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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| 18 | !--------------------------------------------------------------------------------! |
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| 19 | ! |
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| 20 | ! Current revisions: |
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| 21 | ! ----------------- |
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| 22 | ! |
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| 23 | ! |
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| 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: compute_vpt.f90 1354 2014-04-08 15:22:57Z maronga $ |
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| 27 | ! |
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| 28 | ! 1353 2014-04-08 15:21:23Z heinze |
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| 29 | ! REAL constants provided with KIND-attribute |
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| 30 | ! |
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| 31 | ! 1320 2014-03-20 08:40:49Z raasch |
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| 32 | ! ONLY-attribute added to USE-statements, |
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| 33 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 34 | ! kinds are defined in new module kinds, |
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| 35 | ! revision history before 2012 removed, |
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| 36 | ! comment fields (!:) to be used for variable explanations added to |
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| 37 | ! all variable declaration statements |
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| 38 | ! |
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| 39 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 40 | ! code put under GPL (PALM 3.9) |
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| 41 | ! |
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| 42 | ! 803 2012-01-16 15:48:46Z franke |
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| 43 | ! Bugfix: wrong factor in calculation of vpt in case of cloud droplets |
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| 44 | ! |
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| 45 | ! Revision 1.1 2000/04/13 14:40:53 schroeter |
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| 46 | ! Initial revision |
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| 47 | ! |
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| 48 | ! |
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| 49 | ! Description: |
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| 50 | ! ------------- |
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| 51 | ! Computation of the virtual potential temperature |
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| 52 | !------------------------------------------------------------------------------! |
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| 53 | |
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| 54 | USE arrays_3d, & |
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| 55 | ONLY: pt, q, ql, vpt |
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| 56 | |
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| 57 | USE indices, & |
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| 58 | ONLY: nzb, nzt |
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| 59 | |
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| 60 | USE cloud_parameters, & |
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| 61 | ONLY: l_d_cp, pt_d_t |
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| 62 | |
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| 63 | USE control_parameters, & |
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| 64 | ONLY: cloud_droplets, cloud_physics |
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| 65 | |
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| 66 | USE kinds |
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| 67 | |
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| 68 | IMPLICIT NONE |
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| 69 | |
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| 70 | INTEGER(iwp) :: k !: |
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| 71 | |
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| 72 | IF ( .NOT. cloud_physics .AND. .NOT. cloud_droplets ) THEN |
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| 73 | vpt = pt * ( 1.0_wp + 0.61_wp * q ) |
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| 74 | ELSE IF (cloud_physics) THEN |
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| 75 | DO k = nzb, nzt+1 |
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| 76 | vpt(k,:,:) = ( pt(k,:,:) + pt_d_t(k) * l_d_cp * ql(k,:,:) ) * & |
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| 77 | ( 1.0_wp + 0.61_wp * q(k,:,:) - 1.61_wp * ql(k,:,:) ) |
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| 78 | ENDDO |
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| 79 | ELSE |
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| 80 | vpt = pt * ( 1.0_wp + 0.61_wp * q - ql ) |
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| 81 | ENDIF |
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| 82 | |
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| 83 | END SUBROUTINE compute_vpt |
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