source: palm/trunk/UTIL/inifor/src/defs.f90 @ 3183

Last change on this file since 3183 was 3183, checked in by suehring, 3 years ago

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1!> @file src/defs.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 2017-2018 Leibniz Universitaet Hannover
18! Copyright 2017-2018 Deutscher Wetterdienst Offenbach
19!------------------------------------------------------------------------------!
20!
21! Current revisions:
22! -----------------
23!
24!
25! Former revisions:
26! -----------------
27! $Id: defs.f90 3183 2018-07-27 14:25:55Z suehring $
28! Updated defaults for soil extrapolation steps and nudging time-scale
29! Improved handling of the start date string
30! Added gas constant for water vapor
31! Bumped INIFOR version number
32!
33!
34! 3182 2018-07-27 13:36:03Z suehring
35! Initial revision
36!
37!
38!
39! Authors:
40! --------
41! @author Eckhard Kadasch
42!
43! Description:
44! ------------
45!> The defs module provides global constants used in INIFOR.
46!------------------------------------------------------------------------------!
47 MODULE defs
48 
49 IMPLICIT NONE
50 
51 ! Parameters for type definitions
52 INTEGER, PARAMETER  ::  dp    = 8   !< double precision (8 bytes = 64 bits)
53 INTEGER, PARAMETER  ::  sp    = 4   !< single precision (4 bytes = 32 bits)
54 INTEGER, PARAMETER  ::  hp    = 2   !< half precision (2 bytes = 16 bits)
55 INTEGER, PARAMETER  ::  PATH  = 140 !< length of file path strings
56 INTEGER, PARAMETER  ::  LNAME = 150 !< length of long name strings
57 INTEGER, PARAMETER  ::  SNAME = 40  !< length of short name strings
58 INTEGER, PARAMETER  ::  DATE  = 10  !< length of date strings
59
60 ! Trigonomentry
61 REAL(dp), PARAMETER ::  PI = 3.14159265358979323846264338_dp !< Ratio of a circle's circumference to its diamter [-]
62 REAL(dp), PARAMETER ::  TO_RADIANS = PI / 180.0_dp           !< Conversion factor from degrees to radiant [-]
63 REAL(dp), PARAMETER ::  TO_DEGREES = 180.0_dp / PI           !< Conversion factor from radians to degrees [-]
64
65 ! COSMO-DE parameters
66 INTEGER, PARAMETER  ::  WATER_ID = 9                         !< Integer corresponding to the water soil type in COSMO-DE [-]
67 REAL(dp), PARAMETER ::  EARTH_RADIUS = 6371229.0_dp          !< Earth radius used in COSMO-DE [m]
68 REAL(dp), PARAMETER ::  P_SL = 1e5_dp                        !< Reference pressure for computation of COSMO-DE's basic state pressure [Pa]
69 REAL(dp), PARAMETER ::  T_SL = 288.15_dp                     !< Reference temperature for computation of COSMO-DE's basic state pressure [K]
70 REAL(dp), PARAMETER ::  BETA = 42.0_dp                       !< logarithmic lapse rate, dT / d ln(p), for computation of COSMO-DE's basic state pressure [K]
71 REAL(dp), PARAMETER ::  RD   = 287.05_dp                     !< specific gas constant of dry air, used in computation of COSMO-DE's basic state [J/kg/K]
72 REAL(dp), PARAMETER ::  RV   = 461.51_dp                     !< specific gas constant of water vapor [J/kg/K]
73 REAL(dp), PARAMETER ::  G    = 9.80665_dp                    !< acceleration of Earth's gravity, used in computation of COSMO-DE's basic state [m/s/s]
74 REAL(dp), PARAMETER ::  RHO_L = 1e3_dp                       !< density of liquid water, used to convert W_SO from [kg/m^2] to [m^3/m^3], in [kg/m^3]
75
76 ! PALM-4U parameters
77 REAL(dp), PARAMETER ::  P_REF   = 1e5_dp                     !< Reference pressure for potential temperature [Pa]
78 REAL(dp), PARAMETER ::  RD_PALM = 287.0_dp                   !< specific gas constant of dry air, used in computation of PALM-4U's potential temperature [J/kg/K]
79 REAL(dp), PARAMETER ::  CP_PALM = 1005.0_dp                  !< heat capacity of dry air at constant pressure, used in computation of PALM-4U's potential temperature [J/kg/K]
80
81 ! INIFOR parameters
82 INTEGER, PARAMETER          ::  FILL_ITERATIONS = 5          !< Number of iterations for extrapolating soil data into COSMO-DE water cells [-]
83 INTEGER, PARAMETER          ::  FORCING_STEP = 1             !< Number of hours between forcing time steps [h]
84 REAL(dp), PARAMETER         ::  NUDGING_TAU = 21600.0_dp     !< Nudging relaxation time scale [s]
85 CHARACTER(LEN=*), PARAMETER ::  VERSION = '1.3.0'            !< INIFOR version number
86 CHARACTER(LEN=*), PARAMETER ::  COPYRIGHT = 'Copyright 2017-2018 Leibniz Universitaet Hannover' // &
87     NEW_LINE(' ') // ' Copyright 2017-2018 Deutscher Wetterdienst Offenbach' !< Copyright notice
88
89 END MODULE defs
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