/[MITgcm]/MITgcm/model/inc/PARAMS.h
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Revision 1.17 - (hide annotations) (download)
Wed Jun 10 16:05:39 1998 UTC (25 years, 11 months ago) by adcroft
Branch: MAIN
Changes since 1.16: +5 -2 lines
File MIME type: text/plain
Added code to bring "salt" up-to-date with "theta".
One caveat is that implicit diffusion of salt is done with the
diffusivity of theta. We'll sort this out later. In explicit
mode, diffKzS is used.

1 adcroft 1.17 C $Header: /u/gcmpack/models/MITgcmUV/model/inc/PARAMS.h,v 1.16 1998/06/09 16:48:02 cnh Exp $
2 cnh 1.1 C
3     C /==========================================================\
4     C | PARAMS.h |
5     C | o Header file defining model "parameters". |
6     C |==========================================================|
7     C | The values from the model's standard input file are |
8     C | stored into the variables held here. Notes describing |
9     C | the parameters can also be found here. |
10     C \==========================================================/
11 cnh 1.13
12     C Macros for special grid options
13     #include "PARAMS_MACROS.h"
14 cnh 1.1
15     C-- Contants
16     C Useful physical values
17     Real*8 PI
18     PARAMETER ( PI = 3.14159265358979323844D0 )
19     Real*8 deg2rad
20     PARAMETER ( deg2rad = 2.D0*PI/360.D0 )
21    
22 cnh 1.7 C Symbolic values
23     C precXXXX - Used to indicate what precision to use for
24     C dumping model state.
25     INTEGER precFloat32
26     PARAMETER ( precFloat32 = 0 )
27     INTEGER precFloat64
28     PARAMETER ( precFloat64 = 1 )
29    
30     C Checkpoint data
31     INTEGER maxNoChkptLev
32     PARAMETER ( maxNoChkptLev = 2 )
33    
34 cnh 1.1 C-- COMMON /PARM_C/ Character valued parameters used by the model.
35 cnh 1.7 C checkPtSuff - List of checkpoint file suffices
36 cnh 1.16 C bathyFile - File containing bathymetry. If not defined bathymetry
37     C is taken from inline function.
38     C hydrogThetaFile - File containing initial hydrographic data for potential
39     C temperature.
40     C hydrogSaltFile - File containing initial hydrographic data for salinity.
41     C zonalWindFile - File containing zonal wind data
42     C meridWindFile - File containing meridional wind data
43     COMMON /PARM_C/ checkPtSuff,
44     & bathyFile, hydrogThetaFile, hydrogSaltFile,
45     & zonalWindFile, meridWindFile
46 cnh 1.7 CHARACTER*(5) checkPtSuff(maxNoChkptLev)
47 cnh 1.16 CHARACTER*(MAX_LEN_FNAM) bathyFile
48     CHARACTER*(MAX_LEN_FNAM) hydrogThetaFile
49     CHARACTER*(MAX_LEN_FNAM) hydrogSaltFile
50     CHARACTER*(MAX_LEN_FNAM) zonalWindFile
51     CHARACTER*(MAX_LEN_FNAM) meridWindFile
52 cnh 1.7
53 cnh 1.1 C-- COMMON /PARM_I/ Integer valued parameters used by the model.
54     C cg2dMaxIters - Maximum number of iterations in the
55     C two-dimensional con. grad solver.
56     C cg2dChkResFreq - Frequency with which to check residual
57     C in con. grad solver.
58     C nIter0 - Start time-step number of for this run
59     C nTimeSteps - Number of timesteps to execute
60     C numStepsPerPickup - For offline setup. Frequency of pickup
61     C of flow fields.
62 cnh 1.7 C writeStatePrec - Precision used for writing model state.
63     C writeBinaryPrec - Precision used for writing binary files
64     C readBinaryPrec - Precision used for reading binary files
65     C nCheckLev - Holds current checkpoint level
66 cnh 1.1 COMMON /PARM_I/
67     & cg2dMaxIters,
68     & cg2dChkResFreq,
69     & nIter0, nTimeSteps,
70 cnh 1.7 & numStepsPerPickup,
71     & writeStatePrec, nCheckLev,
72     & writeBinaryPrec, readBinaryPrec
73 cnh 1.1 INTEGER cg2dMaxIters
74     INTEGER cg2dChkResFreq
75     INTEGER nIter0
76     INTEGER nTimeSteps
77     INTEGER numStepsPerPickup
78 cnh 1.7 INTEGER writeStatePrec
79     INTEGER writeBinaryPrec
80     INTEGER readBinaryPrec
81     INTEGER nCheckLev
82 cnh 1.1
83     C-- COMMON /PARM_L/ Logical valued parameters used by the model.
84     C usingCartesianGrid - If TRUE grid generation will be in a cartesian
85     C coordinate frame.
86     C usingSphericalPolarGrid - If TRUE grid generation will be in a
87     C spherical polar frame.
88     C momViscosity - Flag which turns momentum friction terms on and off.
89     C momAdvection - Flag which turns advection of momentum on and off.
90     C momForcing - Flag which turns external forcing of momentum on
91     C and off.
92 cnh 1.9 C momPressureForcing - Flag which turns pressure term in momentum equation
93     C on and off.
94 cnh 1.15 C metricTerms - Flag which turns metric terms on or off.
95     C usingSphericalPolarMTerms - If TRUE use spherical polar metric terms.
96 cnh 1.1 C useCoriolis - Flag which turns the coriolis terms on and off.
97     C tempDiffusion - Flag which turns diffusion of temperature on
98     C and off.
99     C tempAdvection - Flag which turns advection of temperature on
100     C and off.
101     C tempForcing - Flag which turns external forcing of temperature on
102     C and off.
103     C saltDiffusion - Flag which turns diffusion of salinit on
104     C and off.
105     C saltAdvection - Flag which turns advection of salinit on
106     C and off.
107     C saltForcing - Flag which turns external forcing of salinit on
108     C and off.
109 cnh 1.8 C implicitFreeSurface - Set to true to use implcit free surface
110     C rigidLid - Set to true to use rigid lid
111 cnh 1.10 C momStepping - Turns momentum equation time-stepping off
112 cnh 1.15 C tempStepping - Turns temperature equation time-stepping off
113 adcroft 1.17 C saltStepping - Turns salinity equation time-stepping off
114 cnh 1.15 C useConstantF - Coriolis parameter set to f0
115     C useBetaPlaneF - Coriolis parameter set to f0 + beta.y
116     C useSphereF - Coriolis parameter set to 2.omega.sin(phi)
117 adcroft 1.14 C implicitDiffusion - Turns implicit vertical diffusion on
118 cnh 1.1 COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,
119 cnh 1.9 & momViscosity, momAdvection, momForcing, useCoriolis, momPressureForcing,
120 cnh 1.1 & tempDiffusion, tempAdvection, tempForcing,
121 cnh 1.8 & saltDiffusion, saltAdvection, saltForcing,
122 adcroft 1.17 & implicitFreeSurface, rigidLid,
123     & momStepping, tempStepping, saltStepping,
124 cnh 1.15 & metricTerms, usingSphericalPolarMTerms,
125     & useConstantF, useBetaPlaneF, useSphereF,
126 adcroft 1.14 & implicitDiffusion
127 cnh 1.1 LOGICAL usingCartesianGrid
128     LOGICAL usingSphericalPolarGrid
129 cnh 1.15 LOGICAL usingSphericalPolarMTerms
130 cnh 1.1 LOGICAL momViscosity
131     LOGICAL momAdvection
132     LOGICAL momForcing
133 cnh 1.9 LOGICAL momPressureForcing
134 cnh 1.1 LOGICAL useCoriolis
135     LOGICAL tempDiffusion
136     LOGICAL tempAdvection
137     LOGICAL tempForcing
138     LOGICAL saltDiffusion
139     LOGICAL saltAdvection
140     LOGICAL saltForcing
141 cnh 1.8 LOGICAL implicitFreeSurface
142     LOGICAL rigidLid
143 cnh 1.10 LOGICAL momStepping
144     LOGICAL tempStepping
145 adcroft 1.17 LOGICAL saltStepping
146 cnh 1.15 LOGICAL metricTerms
147     LOGICAL useConstantF
148     LOGICAL useBetaPlaneF
149     LOGICAL useSphereF
150 adcroft 1.14 LOGICAL implicitDiffusion
151 cnh 1.1
152     C-- COMMON /PARM_R/ "Real" valued parameters used by the model.
153     C cg2dTargetResidual
154     C - Target residual for cg2d solver.
155 cnh 1.7 C cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal.
156     C Note. 20th May 1998
157     C I made a weird discovery! In the model paper we argue
158     C for the form of the preconditioner used here ( see
159     C A Finite-volume, Incompressible Navier-Stokes Model
160     C ...., Marshall et. al ). The algebra gives a simple
161     C 0.5 factor for the averaging of ac and aCw to get a
162     C symmettric pre-conditioner. By using a factor of 0.51
163     C i.e. scaling the off-diagonal terms in the
164     C preconditioner down slightly I managed to get the
165     C number of iterations for convergence in a test case to
166     C drop form 192 -> 134! Need to investigate this further!
167     C For now I have introduced a parameter cg2dpcOffDFac which
168     C defaults to 0.51 but can be set at runtime.
169 cnh 1.3 C delZ - Vertical grid spacing ( m ) - delZ is the distance
170 cnh 1.1 C between "w" surfaces.
171     C delX - Separation between cell faces (m) or (deg), depending
172     C delY on input flags.
173     C gravity - Accel. due to gravity ( m/s^2 )
174 cnh 1.8 C gBaro - Accel. due to gravity used in barotropic equation ( m/s^2 )
175 cnh 1.1 C ronil - Reference density
176 cnh 1.3 C startTime - Start time for model ( s )
177 cnh 1.1 C phiMin - Latitude of southern most cell face.
178     C thetaMin - Longitude of western most cell face (this
179     C is an "inert" parameter but it is included
180     C to make geographical references simple.)
181 cnh 1.3 C rSphere - Radius of sphere for a spherical polar grid ( m ).
182 cnh 1.15 C rRSphere - Reciprocal radius of sphere for a spherical polar grid ( m ).
183 cnh 1.1 C f0 - Reference coriolis parameter ( 1/s )
184     C ( Southern edge f for beta plane )
185     C beta - df/dy ( s^-1.m^-1 )
186 cnh 1.15 C omega - Angular velocity ( rad/s )
187 cnh 1.1 C viscAh - Eddy viscosity coeff. for mixing of
188     C momentum laterally ( m^2/s )
189     C viscAz - Eddy viscosity coeff. for mixing of
190     C momentum vertically ( m^2/s )
191     C viscA4 - Biharmonic viscosity coeff. for mixing of
192     C momentum laterally ( m^4/s )
193     C diffKhT - Laplacian diffusion coeff. for mixing of
194     C heat laterally ( m^2/s )
195     C diffKzT - Laplacian diffusion coeff. for mixing of
196     C heat vertically ( m^2/s )
197     C diffK4T - Biharmonic diffusion coeff. for mixing of
198     C heat laterally ( m^4/s )
199     C diffKhS - Laplacian diffusion coeff. for mixing of
200     C salt laterally ( m^2/s )
201     C diffKzS - Laplacian diffusion coeff. for mixing of
202     C salt vertically ( m^2/s )
203     C diffK4S - Biharmonic diffusion coeff. for mixing of
204     C salt laterally ( m^4/s )
205 cnh 1.3 C deltaT - Default timestep ( s )
206 cnh 1.7 C deltaTClock - Timestep used as model "clock". This determines the
207     C IO frequencies and is used in tagging output. It can
208     C be totally different to the dynamical time. Typically
209     C it will be the deep-water timestep for accelerated runs.
210     C Frequency of checkpointing and dumping of the model state
211     C are referenced to this clock. ( s )
212 cnh 1.3 C deltaTMom - Timestep for momemtum equations ( s )
213     C deltaTtracer - Timestep for tracer equations ( s )
214 cnh 1.8 C freesurfFac - Parameter to turn implicit free surface term on or off
215     C freesurfac = 1. uses implicit free surface
216     C freesurfac = 0. uses rigid lid
217 cnh 1.1 C tauCD - CD scheme coupling timescale ( 1/s )
218     C rCD - CD scheme normalised coupling parameter ( 0-1 )
219 adcroft 1.6 C GMmaxslope - max. slope allowed in GM/Redi tensor
220 cnh 1.8 C GMlength - Length to use in Visbeck et al. formula for K (m)
221 adcroft 1.6 C GMalpha - alpha to use in Visbeck et al. formula for K
222     C GMdepth - Depth over which to integrate Richardson # (Visbeck et al.)
223 cnh 1.8 C GMkbackground - background value of GM/Redi coefficient
224 cnh 1.1 C startTime - Starting time for this integration ( s ).
225     C endTime - Ending time for this integration ( s ).
226 cnh 1.7 C chkPtFreq - Frequency of rolling check pointing ( s ).
227     C pChkPtFreq - Frequency of permanent check pointing ( s ).
228 cnh 1.1 C dumpFreq - Frequency with which model state is written to
229     C post-processing files ( s ).
230 cnh 1.9 C afFacMom - Advection of momentum term scaling parameter
231     C vfFacMom - Momentum viscosity scaling parameter
232     C pfFacMom - Momentum pressure forcing parameter
233     C cfFacMom - Coriolis term scaling parameter
234     C foFacMom - Momentum forcing scaling parameter
235 cnh 1.15 C mtFacMom - Metric terms scaling parameter
236 cnh 1.9 C cAdjFreq - Frequency of convective adjustment
237 cnh 1.7 COMMON /PARM_R/ cg2dTargetResidual, cg2dpcOffDFac, delZ, delX, delY,
238     & deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime, phiMin,
239 cnh 1.15 & thetaMin, rSphere, rRSphere, f0, fCori, beta, viscAh, viscAz, viscA4,
240 cnh 1.7 & diffKhT, diffKzT, diffK4T, diffKhS, diffKzS, diffK4S, delT,
241 cnh 1.8 & tauCD, rCD, freeSurfFac,
242 adcroft 1.6 & GMmaxslope,GMlength,GMalpha,GMdepth,GMkbackground,
243 cnh 1.8 & gravity, gBaro, rhonil, tRef, sRef,
244 cnh 1.9 & endTime, chkPtFreq, pchkPtFreq, dumpFreq,
245 cnh 1.15 & afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom, mtFacMom,
246     & cAdjFreq, omega
247 adcroft 1.6 _RL cg2dTargetResidual
248 cnh 1.7 _RL cg2dpcOffDFac
249 adcroft 1.6 _RL delZ(Nz)
250     _RL delX(Nx)
251     _RL delY(Ny)
252     _RL deltaT
253 cnh 1.7 _RL deltaTClock
254 adcroft 1.6 _RL deltaTmom
255     _RL deltaTtracer
256     _RL abeps
257     _RL phiMin
258     _RL thetaMin
259     _RL rSphere
260 cnh 1.15 _RL rRSphere
261 adcroft 1.6 _RL f0
262 cnh 1.8 _RL freeSurfFac
263 adcroft 1.6 _RL beta
264     _RL viscAh
265     _RL viscAz
266     _RL viscA4
267     _RL diffKhT
268     _RL diffKzT
269     _RL diffK4T
270     _RL diffKhS
271     _RL diffKzS
272     _RL diffK4S
273     _RL delt
274     _RL tauCD
275     _RL rCD
276     _RL GMmaxslope
277     _RL GMlength
278     _RL GMalpha
279     _RL GMdepth
280     _RL GMkbackground
281     _RL gravity
282 cnh 1.8 _RL gBaro
283 adcroft 1.6 _RL rhonil
284     _RL tRef(Nz)
285     _RL sRef(Nz)
286 cnh 1.11 _RS Fcori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
287 adcroft 1.6 _RL startTime
288     _RL endTime
289     _RL chkPtFreq
290 cnh 1.7 _RL pChkPtFreq
291 adcroft 1.6 _RL dumpFreq
292 cnh 1.9 _RL afFacMom
293     _RL vfFacMom
294     _RL pfFacMom
295     _RL cfFacMom
296     _RL foFacMom
297 cnh 1.15 _RL mTFacMom
298 cnh 1.9 _RL cAdjFreq
299 cnh 1.15 _RL omega
300 adcroft 1.6
301 cnh 1.1 COMMON /PARM_A/ HeatCapacity_Cp,
302     & Lamba_theta
303 adcroft 1.6 _RL HeatCapacity_Cp
304     _RL Lamba_theta
305 adcroft 1.5
306     C Equation of State (polynomial coeffients)
307     COMMON /PARM_EOS_NL/ eosC,eosSig0,eosRefT,eosRefS
308 adcroft 1.12 _RL eosC(9,Nz+1),eosSig0(Nz+1),eosRefT(Nz+1),eosRefS(Nz+1)
309 adcroft 1.5 C Linear equation of state
310     C tAlpha - Linear EOS thermal expansion coefficient ( 1/degree ).
311     C sBeta - Linear EOS haline contraction coefficient.
312 adcroft 1.12 COMMON /PARM_EOS_LIN/ tAlpha,sBeta,eosType
313 adcroft 1.6 _RL tAlpha
314     _RL sBeta
315 adcroft 1.12 character*(6) eosType
316 cnh 1.7

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