1 | MODULE phycst |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE phycst *** |
---|
4 | !! Definition of of both ocean and ice parameters used in the code |
---|
5 | !!===================================================================== |
---|
6 | !! History : OPA ! 1990-10 (C. Levy - G. Madec) Original code |
---|
7 | !! 8.1 ! 1991-11 (G. Madec, M. Imbard) cosmetic changes |
---|
8 | !! NEMO 1.0 ! 2002-08 (G. Madec, C. Ethe) F90, add ice constants |
---|
9 | !! - ! 2006-08 (G. Madec) style |
---|
10 | !! 3.2 ! 2006-08 (S. Masson, G. Madec) suppress useless variables + style |
---|
11 | !! 3.4 ! 2011-11 (C. Harris) minor changes for CICE constants |
---|
12 | !!---------------------------------------------------------------------- |
---|
13 | |
---|
14 | !!---------------------------------------------------------------------- |
---|
15 | !! phy_cst : define and print physical constant and domain parameters |
---|
16 | !!---------------------------------------------------------------------- |
---|
17 | USE par_oce ! ocean parameters |
---|
18 | USE in_out_manager ! I/O manager |
---|
19 | |
---|
20 | IMPLICIT NONE |
---|
21 | PRIVATE |
---|
22 | |
---|
23 | PUBLIC phy_cst ! routine called by inipar.F90 |
---|
24 | |
---|
25 | REAL(wp), PUBLIC :: rpi = 3.141592653589793_wp !: pi |
---|
26 | REAL(wp), PUBLIC :: rad = 3.141592653589793_wp / 180._wp !: conversion from degre into radian |
---|
27 | REAL(wp), PUBLIC :: rsmall = 0.5 * EPSILON( 1.e0 ) !: smallest real computer value |
---|
28 | |
---|
29 | REAL(wp), PUBLIC :: rday = 24.*60.*60. !: day [s] |
---|
30 | REAL(wp), PUBLIC :: rsiyea !: sideral year [s] |
---|
31 | REAL(wp), PUBLIC :: rsiday !: sideral day [s] |
---|
32 | REAL(wp), PUBLIC :: raamo = 12._wp !: number of months in one year |
---|
33 | REAL(wp), PUBLIC :: rjjhh = 24._wp !: number of hours in one day |
---|
34 | REAL(wp), PUBLIC :: rhhmm = 60._wp !: number of minutes in one hour |
---|
35 | REAL(wp), PUBLIC :: rmmss = 60._wp !: number of seconds in one minute |
---|
36 | REAL(wp), PUBLIC :: omega !: earth rotation parameter [s-1] |
---|
37 | REAL(wp), PUBLIC :: ra = 6371229._wp !: earth radius [m] |
---|
38 | REAL(wp), PUBLIC :: grav = 9.80665_wp !: gravity [m/s2] |
---|
39 | REAL(wp), PUBLIC :: rt0 = 273.15_wp !: freezing point of fresh water [Kelvin] |
---|
40 | |
---|
41 | REAL(wp), PUBLIC :: rau0 !: volumic mass of reference [kg/m3] |
---|
42 | REAL(wp), PUBLIC :: r1_rau0 !: = 1. / rau0 [m3/kg] |
---|
43 | REAL(wp), PUBLIC :: rcp !: ocean specific heat [J/Kelvin] |
---|
44 | REAL(wp), PUBLIC :: r1_rcp !: = 1. / rcp [Kelvin/J] |
---|
45 | REAL(wp), PUBLIC :: rau0_rcp !: = rau0 * rcp |
---|
46 | REAL(wp), PUBLIC :: r1_rau0_rcp !: = 1. / ( rau0 * rcp ) |
---|
47 | |
---|
48 | REAL(wp), PUBLIC :: emic = 0.97_wp !: emissivity of snow or ice (not used?) |
---|
49 | |
---|
50 | REAL(wp), PUBLIC :: sice = 6.0_wp !: salinity of ice (for pisces) [psu] |
---|
51 | REAL(wp), PUBLIC :: soce = 34.7_wp !: salinity of sea (for pisces and isf) [psu] |
---|
52 | REAL(wp), PUBLIC :: rLevap = 2.46e+6_wp !: latent heat of vaporization for sea-water [J/kg] #LB |
---|
53 | REAL(wp), PUBLIC :: vkarmn = 0.4_wp !: von Karman constant |
---|
54 | REAL(wp), PUBLIC :: stefan = 5.67e-8_wp !: Stefan-Boltzmann constant |
---|
55 | |
---|
56 | REAL(wp), PUBLIC :: rhos = 330._wp !: volumic mass of snow [kg/m3] |
---|
57 | REAL(wp), PUBLIC :: rhoi = 917._wp !: volumic mass of sea ice [kg/m3] |
---|
58 | REAL(wp), PUBLIC :: rhow = 1000._wp !: volumic mass of freshwater in melt ponds [kg/m3] |
---|
59 | REAL(wp), PUBLIC :: rcnd_i = 2.034396_wp !: thermal conductivity of fresh ice [W/m/K] |
---|
60 | REAL(wp), PUBLIC :: rcpi = 2067.0_wp !: specific heat of fresh ice [J/kg/K] |
---|
61 | REAL(wp), PUBLIC :: rLsub = 2.834e+6_wp !: pure ice latent heat of sublimation [J/kg] |
---|
62 | REAL(wp), PUBLIC :: rLfus = 0.334e+6_wp !: latent heat of fusion of fresh ice [J/kg] |
---|
63 | REAL(wp), PUBLIC :: rTmlt = 0.054_wp !: decrease of seawater meltpoint with salinity |
---|
64 | |
---|
65 | REAL(wp), PUBLIC :: r1_rhoi !: 1 / rhoi |
---|
66 | REAL(wp), PUBLIC :: r1_rhos !: 1 / rhos |
---|
67 | REAL(wp), PUBLIC :: r1_rcpi !: 1 / rcpi |
---|
68 | |
---|
69 | |
---|
70 | !#LB: |
---|
71 | !! Mainly used in OCE/SBC (removed from sbcblk.F90) |
---|
72 | REAL(wp), PARAMETER, PUBLIC :: rCp_dry = 1005.0_wp !: Specic heat of dry air, constant pressure [J/K/kg] |
---|
73 | REAL(wp), PARAMETER, PUBLIC :: rCp_vap = 1860.0_wp !: Specic heat of water vapor, constant pressure [J/K/kg] |
---|
74 | REAL(wp), PARAMETER, PUBLIC :: R_dry = 287.05_wp !: Specific gas constant for dry air [J/K/kg] |
---|
75 | REAL(wp), PARAMETER, PUBLIC :: R_vap = 461.495_wp !: Specific gas constant for water vapor [J/K/kg] |
---|
76 | REAL(wp), PARAMETER, PUBLIC :: reps0 = R_dry/R_vap !: ratio of gas constant for dry air and water vapor => ~ 0.622 |
---|
77 | REAL(wp), PARAMETER, PUBLIC :: rctv0 = R_vap/R_dry !: for virtual temperature (== (1-eps)/eps) => ~ 0.608 |
---|
78 | REAL(wp), PARAMETER, PUBLIC :: rCp_air = 1000.5_wp !: specific heat of air (only used for ice fluxes now...) |
---|
79 | REAL(wp), PARAMETER, PUBLIC :: rCd_ice = 1.4e-3_wp !: transfer coefficient over ice |
---|
80 | REAL(wp), PARAMETER, PUBLIC :: albo = 0.066_wp !: ocean albedo assumed to be constant |
---|
81 | ! |
---|
82 | REAL(wp), PARAMETER, PUBLIC :: rho0_a = 1.2_wp !: Approx. of density of air [kg/m^3] |
---|
83 | REAL(wp), PARAMETER, PUBLIC :: rho0_w = 1025._wp !: Density of sea-water (ECMWF->1025) [kg/m^3] |
---|
84 | REAL(wp), PARAMETER, PUBLIC :: rCp0_w = 4190._wp !: Specific heat capacity of seawater (ECMWF 4190) [J/K/kg] |
---|
85 | REAL(wp), PARAMETER, PUBLIC :: rnu0_w = 1.e-6_wp !: kinetic viscosity of water [m^2/s] |
---|
86 | REAL(wp), PARAMETER, PUBLIC :: rk0_w = 0.6_wp !: thermal conductivity of water (at 20C) [W/m/K] |
---|
87 | ! |
---|
88 | REAL(wp), PARAMETER, PUBLIC :: emiss_w = 1._wp !: Surface emissivity (black-body long-wave radiation) of sea-water [] |
---|
89 | ! !: Theoretically close to 0.97! Yet, taken equal as 1 to account for |
---|
90 | ! !: the small fraction of downwelling shortwave reflected at the |
---|
91 | ! !: surface (Lind & Katsaros, 1986) |
---|
92 | REAL(wp), PARAMETER, PUBLIC :: rdct_qsat_salt = 0.98_wp !: reduction factor on specific humidity at saturation (q_sat(T_s)) due to salt |
---|
93 | !#LB. |
---|
94 | |
---|
95 | |
---|
96 | |
---|
97 | !!---------------------------------------------------------------------- |
---|
98 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
---|
99 | !! $Id$ |
---|
100 | !! Software governed by the CeCILL license (see ./LICENSE) |
---|
101 | !!---------------------------------------------------------------------- |
---|
102 | |
---|
103 | CONTAINS |
---|
104 | |
---|
105 | SUBROUTINE phy_cst |
---|
106 | !!---------------------------------------------------------------------- |
---|
107 | !! *** ROUTINE phy_cst *** |
---|
108 | !! |
---|
109 | !! ** Purpose : set and print the constants |
---|
110 | !!---------------------------------------------------------------------- |
---|
111 | |
---|
112 | rsiyea = 365.25_wp * rday * 2._wp * rpi / 6.283076_wp |
---|
113 | rsiday = rday / ( 1._wp + rday / rsiyea ) |
---|
114 | #if defined key_cice |
---|
115 | omega = 7.292116e-05 |
---|
116 | #else |
---|
117 | omega = 2._wp * rpi / rsiday |
---|
118 | #endif |
---|
119 | |
---|
120 | r1_rhoi = 1._wp / rhoi |
---|
121 | r1_rhos = 1._wp / rhos |
---|
122 | r1_rcpi = 1._wp / rcpi |
---|
123 | |
---|
124 | IF(lwp) THEN |
---|
125 | WRITE(numout,*) |
---|
126 | WRITE(numout,*) 'phy_cst : initialization of ocean parameters and constants' |
---|
127 | WRITE(numout,*) '~~~~~~~' |
---|
128 | WRITE(numout,*) ' mathematical constant rpi = ', rpi |
---|
129 | WRITE(numout,*) ' day rday = ', rday, ' s' |
---|
130 | WRITE(numout,*) ' sideral year rsiyea = ', rsiyea, ' s' |
---|
131 | WRITE(numout,*) ' sideral day rsiday = ', rsiday, ' s' |
---|
132 | WRITE(numout,*) ' omega omega = ', omega, ' s^-1' |
---|
133 | WRITE(numout,*) |
---|
134 | WRITE(numout,*) ' nb of months per year raamo = ', raamo, ' months' |
---|
135 | WRITE(numout,*) ' nb of hours per day rjjhh = ', rjjhh, ' hours' |
---|
136 | WRITE(numout,*) ' nb of minutes per hour rhhmm = ', rhhmm, ' mn' |
---|
137 | WRITE(numout,*) ' nb of seconds per minute rmmss = ', rmmss, ' s' |
---|
138 | WRITE(numout,*) |
---|
139 | WRITE(numout,*) ' earth radius ra = ', ra , ' m' |
---|
140 | WRITE(numout,*) ' gravity grav = ', grav , ' m/s^2' |
---|
141 | WRITE(numout,*) |
---|
142 | WRITE(numout,*) ' freezing point of water rt0 = ', rt0 , ' K' |
---|
143 | WRITE(numout,*) |
---|
144 | WRITE(numout,*) ' reference density and heat capacity now defined in eosbn2.f90' |
---|
145 | WRITE(numout,*) |
---|
146 | WRITE(numout,*) ' thermal conductivity of pure ice = ', rcnd_i , ' J/s/m/K' |
---|
147 | WRITE(numout,*) ' thermal conductivity of snow is defined in a namelist ' |
---|
148 | WRITE(numout,*) ' fresh ice specific heat = ', rcpi , ' J/kg/K' |
---|
149 | WRITE(numout,*) ' latent heat of fusion of fresh ice / snow = ', rLfus , ' J/kg' |
---|
150 | WRITE(numout,*) ' latent heat of subl. of fresh ice / snow = ', rLsub , ' J/kg' |
---|
151 | WRITE(numout,*) ' density of sea ice = ', rhoi , ' kg/m^3' |
---|
152 | WRITE(numout,*) ' density of snow = ', rhos , ' kg/m^3' |
---|
153 | WRITE(numout,*) ' density of freshwater (in melt ponds) = ', rhow , ' kg/m^3' |
---|
154 | WRITE(numout,*) ' salinity of ice (for pisces) = ', sice , ' psu' |
---|
155 | WRITE(numout,*) ' salinity of sea (for pisces and isf) = ', soce , ' psu' |
---|
156 | WRITE(numout,*) ' latent heat of evaporation (water) = ', rLevap , ' J/m^3' |
---|
157 | WRITE(numout,*) ' von Karman constant = ', vkarmn |
---|
158 | WRITE(numout,*) ' Stefan-Boltzmann constant = ', stefan , ' J/s/m^2/K^4' |
---|
159 | WRITE(numout,*) |
---|
160 | WRITE(numout,*) ' conversion: degre ==> radian rad = ', rad |
---|
161 | WRITE(numout,*) |
---|
162 | WRITE(numout,*) ' smallest real computer value rsmall = ', rsmall |
---|
163 | ENDIF |
---|
164 | |
---|
165 | END SUBROUTINE phy_cst |
---|
166 | |
---|
167 | !!====================================================================== |
---|
168 | END MODULE phycst |
---|