/[MITgcm]/MITgcm/model/inc/PARAMS.h
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revision 1.4 by cnh, Mon Apr 27 04:24:22 1998 UTC revision 1.11 by cnh, Tue May 26 21:29:44 1998 UTC
# Line 10  C     | the parameters can also be found Line 10  C     | the parameters can also be found
10  C     \==========================================================/  C     \==========================================================/
11    
12  C--   Contants  C--   Contants
 C     nOBands - No. of offline data time bands  
       INTEGER nOBands  
       PARAMETER ( nOBands = 12 )  
13  C     Useful physical values  C     Useful physical values
14        Real*8 PI        Real*8 PI
15        PARAMETER ( PI    = 3.14159265358979323844D0   )        PARAMETER ( PI    = 3.14159265358979323844D0   )
16        Real*8 deg2rad        Real*8 deg2rad
17        PARAMETER ( deg2rad = 2.D0*PI/360.D0           )        PARAMETER ( deg2rad = 2.D0*PI/360.D0           )
18    
19    C     Symbolic values
20    C     precXXXX - Used to indicate what precision to use for
21    C                dumping model state.
22          INTEGER precFloat32
23          PARAMETER ( precFloat32 = 0 )
24          INTEGER precFloat64
25          PARAMETER ( precFloat64 = 1 )
26    
27    C     Checkpoint data
28          INTEGER maxNoChkptLev
29          PARAMETER ( maxNoChkptLev = 2 )
30    
31  C--   COMMON /PARM_C/ Character valued parameters used by the model.  C--   COMMON /PARM_C/ Character valued parameters used by the model.
32  C     oBandId  - Offline dataset identifiers for different periods.  C     checkPtSuff - List of checkpoint file suffices
33        COMMON /PARM_C/ oBandId        COMMON /PARM_C/ checkPtSuff
34        CHARACTER*3 oBandId(nOBands)        CHARACTER*(5) checkPtSuff(maxNoChkptLev)
35    
36  C--   COMMON /PARM_I/ Integer valued parameters used by the model.  C--   COMMON /PARM_I/ Integer valued parameters used by the model.
37  C     cg2dMaxIters        - Maximum number of iterations in the  C     cg2dMaxIters        - Maximum number of iterations in the
38  C                           two-dimensional con. grad solver.  C                           two-dimensional con. grad solver.
# Line 32  C     nIter0              - Start time-s Line 42  C     nIter0              - Start time-s
42  C     nTimeSteps          - Number of timesteps to execute  C     nTimeSteps          - Number of timesteps to execute
43  C     numStepsPerPickup   - For offline setup. Frequency of pickup  C     numStepsPerPickup   - For offline setup. Frequency of pickup
44  C                           of flow fields.  C                           of flow fields.
45    C     writeStatePrec      - Precision used for writing model state.
46    C     writeBinaryPrec     - Precision used for writing binary files
47    C     readBinaryPrec      - Precision used for reading binary files
48    C     nCheckLev           - Holds current checkpoint level
49        COMMON /PARM_I/        COMMON /PARM_I/
50       &        cg2dMaxIters,       &        cg2dMaxIters,
51       &        cg2dChkResFreq,       &        cg2dChkResFreq,
52       &        nIter0, nTimeSteps,       &        nIter0, nTimeSteps,
53       &        numStepsPerPickup       &        numStepsPerPickup,
54         &        writeStatePrec, nCheckLev,
55         &        writeBinaryPrec, readBinaryPrec
56        INTEGER cg2dMaxIters        INTEGER cg2dMaxIters
57        INTEGER cg2dChkResFreq        INTEGER cg2dChkResFreq
58        INTEGER nIter0        INTEGER nIter0
59        INTEGER nTimeSteps        INTEGER nTimeSteps
60        INTEGER numStepsPerPickup        INTEGER numStepsPerPickup
61          INTEGER writeStatePrec
62          INTEGER writeBinaryPrec
63          INTEGER readBinaryPrec
64          INTEGER nCheckLev
65    
66  C--   COMMON /PARM_L/ Logical valued parameters used by the model.  C--   COMMON /PARM_L/ Logical valued parameters used by the model.
67  C     usingCartesianGrid - If TRUE grid generation will be in a cartesian  C     usingCartesianGrid - If TRUE grid generation will be in a cartesian
# Line 52  C     momViscosity  - Flag which turns m Line 72  C     momViscosity  - Flag which turns m
72  C     momAdvection  - Flag which turns advection of momentum on and off.  C     momAdvection  - Flag which turns advection of momentum on and off.
73  C     momForcing    - Flag which turns external forcing of momentum on  C     momForcing    - Flag which turns external forcing of momentum on
74  C                     and off.  C                     and off.
75    C     momPressureForcing - Flag which turns pressure term in momentum equation
76    C                          on and off.
77  C     useCoriolis   - Flag which turns the coriolis terms on and off.  C     useCoriolis   - Flag which turns the coriolis terms on and off.
78  C     tempDiffusion - Flag which turns diffusion of temperature on  C     tempDiffusion - Flag which turns diffusion of temperature on
79  C                     and off.  C                     and off.
# Line 65  C     saltAdvection - Flag which turns a Line 87  C     saltAdvection - Flag which turns a
87  C                     and off.  C                     and off.
88  C     saltForcing   - Flag which turns external forcing of salinit on  C     saltForcing   - Flag which turns external forcing of salinit on
89  C                     and off.  C                     and off.
90    C     implicitFreeSurface - Set to true to use implcit free surface
91    C     rigidLid            - Set to true to use rigid lid
92    C     momStepping   - Turns momentum equation time-stepping off
93    C     momStepping   - Turns temperature equation time-stepping off
94        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,
95       & momViscosity, momAdvection, momForcing, useCoriolis,       & momViscosity, momAdvection, momForcing, useCoriolis, momPressureForcing,
96       & tempDiffusion, tempAdvection, tempForcing,       & tempDiffusion, tempAdvection, tempForcing,
97       & saltDiffusion, saltAdvection, saltForcing       & saltDiffusion, saltAdvection, saltForcing,
98         & implicitFreeSurface, rigidLid, momStepping, tempStepping
99        LOGICAL usingCartesianGrid        LOGICAL usingCartesianGrid
100        LOGICAL usingSphericalPolarGrid        LOGICAL usingSphericalPolarGrid
101        LOGICAL momViscosity        LOGICAL momViscosity
102        LOGICAL momAdvection        LOGICAL momAdvection
103        LOGICAL momForcing        LOGICAL momForcing
104          LOGICAL momPressureForcing
105        LOGICAL useCoriolis        LOGICAL useCoriolis
106        LOGICAL tempDiffusion        LOGICAL tempDiffusion
107        LOGICAL tempAdvection        LOGICAL tempAdvection
# Line 81  C                     and off. Line 109  C                     and off.
109        LOGICAL saltDiffusion        LOGICAL saltDiffusion
110        LOGICAL saltAdvection        LOGICAL saltAdvection
111        LOGICAL saltForcing        LOGICAL saltForcing
112          LOGICAL implicitFreeSurface
113          LOGICAL rigidLid
114          LOGICAL momStepping
115          LOGICAL tempStepping
116    
117  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.
118  C     cg2dTargetResidual  C     cg2dTargetResidual
119  C               - Target residual for cg2d solver.  C               - Target residual for cg2d solver.
120    C     cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal.
121    C     Note. 20th May 1998
122    C           I made a weird discovery! In the model paper we argue
123    C           for the form of the preconditioner used here ( see
124    C           A Finite-volume, Incompressible Navier-Stokes Model
125    C           ...., Marshall et. al ). The algebra gives a simple
126    C           0.5 factor for the averaging of ac and aCw to get a
127    C           symmettric pre-conditioner. By using a factor of 0.51
128    C           i.e. scaling the off-diagonal terms in the
129    C           preconditioner down slightly I managed to get the
130    C           number of iterations for convergence in a test case to
131    C           drop form 192 -> 134! Need to investigate this further!
132    C           For now I have introduced a parameter cg2dpcOffDFac which
133    C           defaults to 0.51 but can be set at runtime.
134  C     delZ      - Vertical grid spacing ( m ) - delZ is the distance  C     delZ      - Vertical grid spacing ( m ) - delZ is the distance
135  C                 between "w" surfaces.  C                 between "w" surfaces.
136  C     delX      - Separation between cell faces (m) or (deg), depending  C     delX      - Separation between cell faces (m) or (deg), depending
137  C     delY        on input flags.  C     delY        on input flags.
138  C     gravity   - Accel. due to gravity ( m/s^2 )  C     gravity   - Accel. due to gravity ( m/s^2 )
139    C     gBaro     - Accel. due to gravity used in barotropic equation ( m/s^2 )
140  C     ronil     - Reference density  C     ronil     - Reference density
141  C     startTime - Start time for model ( s )  C     startTime - Start time for model ( s )
142  C     phiMin    - Latitude of southern most cell face.  C     phiMin    - Latitude of southern most cell face.
# Line 118  C     diffKzS   - Laplacian diffusion co Line 165  C     diffKzS   - Laplacian diffusion co
165  C                 salt vertically ( m^2/s )  C                 salt vertically ( m^2/s )
166  C     diffK4S   - Biharmonic diffusion coeff. for mixing of  C     diffK4S   - Biharmonic diffusion coeff. for mixing of
167  C                 salt laterally ( m^4/s )  C                 salt laterally ( m^4/s )
 C     tAlpha    - Linear EOS thermal expansion coefficient ( 1/degree ).  
 C     sBeta     - Linear EOS haline contraction coefficient.  
168  C     deltaT    - Default timestep ( s )  C     deltaT    - Default timestep ( s )
169    C     deltaTClock  - Timestep used as model "clock". This determines the
170    C                    IO frequencies and is used in tagging output. It can
171    C                    be totally different to the dynamical time. Typically
172    C                    it will be the deep-water timestep for accelerated runs.
173    C                    Frequency of checkpointing and dumping of the model state
174    C                    are referenced to this clock. ( s )
175  C     deltaTMom    - Timestep for momemtum equations ( s )  C     deltaTMom    - Timestep for momemtum equations ( s )
176  C     deltaTtracer - Timestep for tracer equations ( s )  C     deltaTtracer - Timestep for tracer equations ( s )
177    C     freesurfFac  - Parameter to turn implicit free surface term on or off
178    C                    freesurfac = 1. uses implicit free surface
179    C                    freesurfac = 0. uses rigid lid
180  C     tauCD     - CD scheme coupling timescale ( 1/s )  C     tauCD     - CD scheme coupling timescale ( 1/s )
181  C     rCD       - CD scheme normalised coupling parameter ( 0-1 )  C     rCD       - CD scheme normalised coupling parameter ( 0-1 )
182    C     GMmaxslope  - max. slope allowed in GM/Redi tensor
183    C     GMlength  - Length to use in Visbeck et al. formula for K (m)
184    C     GMalpha   - alpha to use in Visbeck et al. formula for K
185    C     GMdepth   - Depth over which to integrate Richardson # (Visbeck et al.)
186    C     GMkbackground - background value of GM/Redi coefficient
187  C     startTime - Starting time for this integration ( s ).  C     startTime - Starting time for this integration ( s ).
188  C     endTime   - Ending time for this integration ( s ).  C     endTime   - Ending time for this integration ( s ).
189  C     chkPtFreq - Frequency of check pointing ( s ).  C     chkPtFreq  - Frequency of rolling check pointing ( s ).
190    C     pChkPtFreq - Frequency of permanent check pointing ( s ).
191  C     dumpFreq  - Frequency with which model state is written to  C     dumpFreq  - Frequency with which model state is written to
192  C                 post-processing files ( s ).  C                 post-processing files ( s ).
193        COMMON /PARM_R/ cg2dTargetResidual, delZ, delX, delY, deltaT,  C     afFacMom  - Advection of momentum term scaling parameter
194       & deltaTmom, deltaTtracer, abeps, startTime, phiMin, thetaMin,  C     vfFacMom  - Momentum viscosity scaling parameter
195       & rSphere, f0, fCori, beta, viscAh, viscAz, viscA4, diffKhT, diffKzT,  C     pfFacMom  - Momentum pressure forcing parameter
196       & diffK4T, diffKhS, diffKzS, diffK4S, delT, tauCD, rCD,  C     cfFacMom  - Coriolis term scaling parameter
197       & tAlpha, sBeta, gravity, rhonil, tRef, sRef,  C     foFacMom  - Momentum forcing scaling parameter
198       & endTime, chkPtFreq, dumpFreq  C     cAdjFreq  - Frequency of convective adjustment
199        REAL cg2dTargetResidual        COMMON /PARM_R/ cg2dTargetResidual, cg2dpcOffDFac, delZ, delX, delY,
200        REAL delZ(Nz)       & deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime, phiMin,
201        REAL delX(Nx)       & thetaMin, rSphere, f0, fCori, beta, viscAh, viscAz, viscA4,
202        REAL delY(Ny)       & diffKhT, diffKzT, diffK4T, diffKhS, diffKzS, diffK4S, delT,
203        REAL deltaT       & tauCD, rCD, freeSurfFac,
204        REAL deltaTmom       & GMmaxslope,GMlength,GMalpha,GMdepth,GMkbackground,
205        REAL deltaTtracer       & gravity, gBaro, rhonil, tRef, sRef,
206        REAL abeps       & endTime, chkPtFreq, pchkPtFreq, dumpFreq,
207        REAL phiMin       & afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom,
208        REAL thetaMin       & cAdjFreq
209        REAL rSphere        _RL cg2dTargetResidual
210        REAL f0        _RL cg2dpcOffDFac
211        _RL  beta        _RL delZ(Nz)
212        REAL viscAh        _RL delX(Nx)
213        REAL viscAz        _RL delY(Ny)
214        REAL viscA4        _RL deltaT
215        REAL diffKhT        _RL deltaTClock
216        REAL diffKzT        _RL deltaTmom
217        REAL diffK4T        _RL deltaTtracer
218        REAL diffKhS        _RL abeps
219        REAL diffKzS        _RL phiMin
220        REAL diffK4S        _RL thetaMin
221        REAL delt        _RL rSphere
222        REAL tauCD        _RL f0
223        REAL rCD        _RL freeSurfFac
224        REAL tAlpha        _RL beta
225        REAL sBeta        _RL viscAh
226        REAL gravity        _RL viscAz
227        REAL rhonil        _RL viscA4
228        REAL tRef(Nz)        _RL diffKhT
229        REAL sRef(Nz)        _RL diffKzT
230        real Fcori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)        _RL diffK4T
231        REAL startTime        _RL diffKhS
232        REAL endTime        _RL diffKzS
233        REAL chkPtFreq        _RL diffK4S
234        REAL dumpFreq        _RL delt
235          _RL tauCD
236          _RL rCD
237          _RL GMmaxslope
238          _RL GMlength
239          _RL GMalpha
240          _RL GMdepth
241          _RL GMkbackground
242          _RL gravity
243          _RL gBaro
244          _RL rhonil
245          _RL tRef(Nz)
246          _RL sRef(Nz)
247          _RS Fcori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
248          _RL startTime
249          _RL endTime
250          _RL chkPtFreq
251          _RL pChkPtFreq
252          _RL dumpFreq
253          _RL afFacMom
254          _RL vfFacMom
255          _RL pfFacMom
256          _RL cfFacMom
257          _RL foFacMom
258          _RL cAdjFreq
259    
260        COMMON /PARM_A/ HeatCapacity_Cp,        COMMON /PARM_A/ HeatCapacity_Cp,
261       &                Lamba_theta       &                Lamba_theta
262        REAL HeatCapacity_Cp        _RL HeatCapacity_Cp
263        REAL Lamba_theta        _RL Lamba_theta
264    
265    C Equation of State (polynomial coeffients)
266          COMMON /PARM_EOS_NL/ eosC,eosSig0,eosRefT,eosRefS
267          _RL eosC(Nz+1,9),eosSig0(Nz+1),eosRefT(Nz+1),eosRefS(Nz+1)
268    C Linear equation of state
269    C     tAlpha    - Linear EOS thermal expansion coefficient ( 1/degree ).
270    C     sBeta     - Linear EOS haline contraction coefficient.
271          COMMON /PARM_EOS_LIN/ tAlpha,sBeta
272          _RL tAlpha
273          _RL sBeta
274    
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