!> @file calc_liquid_water_content.f90 !------------------------------------------------------------------------------! ! This file is part of the PALM model system. ! ! PALM is free software: you can redistribute it and/or modify it under the ! terms of the GNU General Public License as published by the Free Software ! Foundation, either version 3 of the License, or (at your option) any later ! version. ! ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. ! ! You should have received a copy of the GNU General Public License along with ! PALM. If not, see . ! ! Copyright 1997-2018 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ----------------- ! ! ! Former revisions: ! ----------------- ! $Id: calc_liquid_water_content.f90 3241 2018-09-12 15:02:00Z sward $ ! unused variables removed ! ! 2719 2018-01-02 09:02:06Z maronga ! Bugfix for last change. ! ! 2718 2018-01-02 08:49:38Z maronga ! Corrected "Former revisions" section ! ! 2696 2017-12-14 17:12:51Z kanani ! Change in file header (GPL part) ! ! 2608 2017-11-13 14:04:26Z schwenkel ! Calculation of supersaturation in external module (diagnostic_quantities_mod). ! Change: correct calculation of saturation specific humidity to saturation ! mixing ratio (the factor of 0.378 vanishes). ! ! 2292 2017-06-20 09:51:42Z schwenkel ! Implementation of new microphysic scheme: cloud_scheme = 'morrison' ! includes two more prognostic equations for cloud drop concentration (nc) ! and cloud water content (qc). ! ! 2233 2017-05-30 18:08:54Z suehring ! ! 2232 2017-05-30 17:47:52Z suehring ! Adjustments to new topography concept ! ! 2000 2016-08-20 18:09:15Z knoop ! Forced header and separation lines into 80 columns ! ! 1822 2016-04-07 07:49:42Z hoffmann ! icloud_scheme removed. microphysics_seifert added. ! ! 1682 2015-10-07 23:56:08Z knoop ! Code annotations made doxygen readable ! ! 1353 2014-04-08 15:21:23Z heinze ! REAL constants provided with KIND-attribute ! ! 1320 2014-03-20 08:40:49Z raasch ! ONLY-attribute added to USE-statements, ! kind-parameters added to all INTEGER and REAL declaration statements, ! kinds are defined in new module kinds, ! revision history before 2012 removed, ! comment fields (!:) to be used for variable explanations added to ! all variable declaration statements ! ! 1253 2013-11-07 10:48:12Z fricke ! Bugfix: q is set to qr in case that q is smaller than qr ! ! 1115 2013-03-26 18:16:16Z hoffmann ! drizzle can be used independently from precipitation ! ! 1053 2012-11-13 17:11:03Z hoffmann ! description expanded to the two-moment cloud scheme ! ! 1036 2012-10-22 13:43:42Z raasch ! code put under GPL (PALM 3.9) ! ! Revision 1.1 2000/04/13 14:50:45 schroeter ! Initial revision ! ! ! Description: ! ------------ !> Calculation of the liquid water content (0%-or-100%-scheme). This scheme is !> used by the one and the two moment cloud physics scheme. Using the two moment !> scheme, this calculation results in the cloud water content. !------------------------------------------------------------------------------! SUBROUTINE calc_liquid_water_content USE arrays_3d, & ONLY: q, qc, ql, qr USE control_parameters, & ONLY: microphysics_morrison, microphysics_seifert USE diagnostic_quantities_mod, & ONLY: magnus, q_s, supersaturation USE indices, & ONLY: nxlg, nxrg, nyng, nysg, nzb, nzt, wall_flags_0 USE kinds USE pegrid IMPLICIT NONE INTEGER(iwp) :: i !< INTEGER(iwp) :: j !< INTEGER(iwp) :: k !< DO i = nxlg, nxrg DO j = nysg, nyng DO k = nzb+1, nzt ! !-- Call calculation of supersaturation located !-- in diagnostic_quantities_mod CALL supersaturation( i, j, k ) ! !-- Compute the liquid water content IF ( microphysics_seifert .AND. .NOT. microphysics_morrison ) & THEN IF ( ( q(k,j,i) - q_s - qr(k,j,i) ) > 0.0_wp ) THEN qc(k,j,i) = ( q(k,j,i) - q_s - qr(k,j,i) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_0(k,j,i), 0 ) ) ql(k,j,i) = ( qc(k,j,i) + qr(k,j,i) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_0(k,j,i), 0 ) ) ELSE IF ( q(k,j,i) < qr(k,j,i) ) q(k,j,i) = qr(k,j,i) qc(k,j,i) = 0.0_wp ql(k,j,i) = qr(k,j,i) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_0(k,j,i), 0 ) ) ENDIF ELSEIF ( microphysics_morrison ) THEN ql(k,j,i) = qc(k,j,i) + qr(k,j,i) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_0(k,j,i), 0 ) ) ELSE IF ( ( q(k,j,i) - q_s ) > 0.0_wp ) THEN qc(k,j,i) = ( q(k,j,i) - q_s ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_0(k,j,i), 0 ) ) ql(k,j,i) = qc(k,j,i) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_0(k,j,i), 0 ) ) ELSE qc(k,j,i) = 0.0_wp ql(k,j,i) = 0.0_wp ENDIF ENDIF ENDDO ENDDO ENDDO END SUBROUTINE calc_liquid_water_content