/[MITgcm]/MITgcm/model/inc/PARAMS.h
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revision 1.6 by adcroft, Wed May 20 21:29:31 1998 UTC revision 1.15 by cnh, Mon Jun 8 21:43:00 1998 UTC
# Line 9  C     | stored into the variables held h Line 9  C     | stored into the variables held h
9  C     | the parameters can also be found here.                   |  C     | the parameters can also be found here.                   |
10  C     \==========================================================/  C     \==========================================================/
11    
12    C     Macros for special grid options
13    #include "PARAMS_MACROS.h"
14    
15  C--   Contants  C--   Contants
 C     nOBands - No. of offline data time bands  
       INTEGER nOBands  
       PARAMETER ( nOBands = 12 )  
16  C     Useful physical values  C     Useful physical values
17        Real*8 PI        Real*8 PI
18        PARAMETER ( PI    = 3.14159265358979323844D0   )        PARAMETER ( PI    = 3.14159265358979323844D0   )
19        Real*8 deg2rad        Real*8 deg2rad
20        PARAMETER ( deg2rad = 2.D0*PI/360.D0           )        PARAMETER ( deg2rad = 2.D0*PI/360.D0           )
21    
22    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  C--   COMMON /PARM_C/ Character valued parameters used by the model.  C--   COMMON /PARM_C/ Character valued parameters used by the model.
35  C     oBandId  - Offline dataset identifiers for different periods.  C     checkPtSuff - List of checkpoint file suffices
36        COMMON /PARM_C/ oBandId        COMMON /PARM_C/ checkPtSuff
37        CHARACTER*3 oBandId(nOBands)        CHARACTER*(5) checkPtSuff(maxNoChkptLev)
38    
39  C--   COMMON /PARM_I/ Integer valued parameters used by the model.  C--   COMMON /PARM_I/ Integer valued parameters used by the model.
40  C     cg2dMaxIters        - Maximum number of iterations in the  C     cg2dMaxIters        - Maximum number of iterations in the
41  C                           two-dimensional con. grad solver.  C                           two-dimensional con. grad solver.
# Line 32  C     nIter0              - Start time-s Line 45  C     nIter0              - Start time-s
45  C     nTimeSteps          - Number of timesteps to execute  C     nTimeSteps          - Number of timesteps to execute
46  C     numStepsPerPickup   - For offline setup. Frequency of pickup  C     numStepsPerPickup   - For offline setup. Frequency of pickup
47  C                           of flow fields.  C                           of flow fields.
48    C     writeStatePrec      - Precision used for writing model state.
49    C     writeBinaryPrec     - Precision used for writing binary files
50    C     readBinaryPrec      - Precision used for reading binary files
51    C     nCheckLev           - Holds current checkpoint level
52        COMMON /PARM_I/        COMMON /PARM_I/
53       &        cg2dMaxIters,       &        cg2dMaxIters,
54       &        cg2dChkResFreq,       &        cg2dChkResFreq,
55       &        nIter0, nTimeSteps,       &        nIter0, nTimeSteps,
56       &        numStepsPerPickup       &        numStepsPerPickup,
57         &        writeStatePrec, nCheckLev,
58         &        writeBinaryPrec, readBinaryPrec
59        INTEGER cg2dMaxIters        INTEGER cg2dMaxIters
60        INTEGER cg2dChkResFreq        INTEGER cg2dChkResFreq
61        INTEGER nIter0        INTEGER nIter0
62        INTEGER nTimeSteps        INTEGER nTimeSteps
63        INTEGER numStepsPerPickup        INTEGER numStepsPerPickup
64          INTEGER writeStatePrec
65          INTEGER writeBinaryPrec
66          INTEGER readBinaryPrec
67          INTEGER nCheckLev
68    
69  C--   COMMON /PARM_L/ Logical valued parameters used by the model.  C--   COMMON /PARM_L/ Logical valued parameters used by the model.
70  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 75  C     momViscosity  - Flag which turns m
75  C     momAdvection  - Flag which turns advection of momentum on and off.  C     momAdvection  - Flag which turns advection of momentum on and off.
76  C     momForcing    - Flag which turns external forcing of momentum on  C     momForcing    - Flag which turns external forcing of momentum on
77  C                     and off.  C                     and off.
78    C     momPressureForcing - Flag which turns pressure term in momentum equation
79    C                          on and off.
80    C     metricTerms   - Flag which turns metric terms on or off.
81    C     usingSphericalPolarMTerms - If TRUE use spherical polar metric terms.
82  C     useCoriolis   - Flag which turns the coriolis terms on and off.  C     useCoriolis   - Flag which turns the coriolis terms on and off.
83  C     tempDiffusion - Flag which turns diffusion of temperature on  C     tempDiffusion - Flag which turns diffusion of temperature on
84  C                     and off.  C                     and off.
# Line 65  C     saltAdvection - Flag which turns a Line 92  C     saltAdvection - Flag which turns a
92  C                     and off.  C                     and off.
93  C     saltForcing   - Flag which turns external forcing of salinit on  C     saltForcing   - Flag which turns external forcing of salinit on
94  C                     and off.  C                     and off.
95    C     implicitFreeSurface - Set to true to use implcit free surface
96    C     rigidLid            - Set to true to use rigid lid
97    C     momStepping   - Turns momentum equation time-stepping off
98    C     tempStepping  - Turns temperature equation time-stepping off
99    C     useConstantF  - Coriolis parameter set to f0
100    C     useBetaPlaneF - Coriolis parameter set to f0 + beta.y
101    C     useSphereF    - Coriolis parameter set to 2.omega.sin(phi)
102    C     implicitDiffusion - Turns implicit vertical diffusion on
103        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,
104       & momViscosity, momAdvection, momForcing, useCoriolis,       & momViscosity, momAdvection, momForcing, useCoriolis, momPressureForcing,
105       & tempDiffusion, tempAdvection, tempForcing,       & tempDiffusion, tempAdvection, tempForcing,
106       & saltDiffusion, saltAdvection, saltForcing       & saltDiffusion, saltAdvection, saltForcing,
107         & implicitFreeSurface, rigidLid, momStepping, tempStepping,
108         & metricTerms, usingSphericalPolarMTerms,
109         & useConstantF, useBetaPlaneF, useSphereF,
110         & implicitDiffusion
111        LOGICAL usingCartesianGrid        LOGICAL usingCartesianGrid
112        LOGICAL usingSphericalPolarGrid        LOGICAL usingSphericalPolarGrid
113          LOGICAL usingSphericalPolarMTerms
114        LOGICAL momViscosity        LOGICAL momViscosity
115        LOGICAL momAdvection        LOGICAL momAdvection
116        LOGICAL momForcing        LOGICAL momForcing
117          LOGICAL momPressureForcing
118        LOGICAL useCoriolis        LOGICAL useCoriolis
119        LOGICAL tempDiffusion        LOGICAL tempDiffusion
120        LOGICAL tempAdvection        LOGICAL tempAdvection
# Line 81  C                     and off. Line 122  C                     and off.
122        LOGICAL saltDiffusion        LOGICAL saltDiffusion
123        LOGICAL saltAdvection        LOGICAL saltAdvection
124        LOGICAL saltForcing        LOGICAL saltForcing
125          LOGICAL implicitFreeSurface
126          LOGICAL rigidLid
127          LOGICAL momStepping
128          LOGICAL tempStepping
129          LOGICAL metricTerms
130          LOGICAL useConstantF
131          LOGICAL useBetaPlaneF
132          LOGICAL useSphereF
133          LOGICAL implicitDiffusion
134    
135  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.
136  C     cg2dTargetResidual  C     cg2dTargetResidual
137  C               - Target residual for cg2d solver.  C               - Target residual for cg2d solver.
138    C     cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal.
139    C     Note. 20th May 1998
140    C           I made a weird discovery! In the model paper we argue
141    C           for the form of the preconditioner used here ( see
142    C           A Finite-volume, Incompressible Navier-Stokes Model
143    C           ...., Marshall et. al ). The algebra gives a simple
144    C           0.5 factor for the averaging of ac and aCw to get a
145    C           symmettric pre-conditioner. By using a factor of 0.51
146    C           i.e. scaling the off-diagonal terms in the
147    C           preconditioner down slightly I managed to get the
148    C           number of iterations for convergence in a test case to
149    C           drop form 192 -> 134! Need to investigate this further!
150    C           For now I have introduced a parameter cg2dpcOffDFac which
151    C           defaults to 0.51 but can be set at runtime.
152  C     delZ      - Vertical grid spacing ( m ) - delZ is the distance  C     delZ      - Vertical grid spacing ( m ) - delZ is the distance
153  C                 between "w" surfaces.  C                 between "w" surfaces.
154  C     delX      - Separation between cell faces (m) or (deg), depending  C     delX      - Separation between cell faces (m) or (deg), depending
155  C     delY        on input flags.  C     delY        on input flags.
156  C     gravity   - Accel. due to gravity ( m/s^2 )  C     gravity   - Accel. due to gravity ( m/s^2 )
157    C     gBaro     - Accel. due to gravity used in barotropic equation ( m/s^2 )
158  C     ronil     - Reference density  C     ronil     - Reference density
159  C     startTime - Start time for model ( s )  C     startTime - Start time for model ( s )
160  C     phiMin    - Latitude of southern most cell face.  C     phiMin    - Latitude of southern most cell face.
# Line 97  C     thetaMin  - Longitude of western m Line 162  C     thetaMin  - Longitude of western m
162  C                 is an "inert" parameter but it is included  C                 is an "inert" parameter but it is included
163  C                 to make geographical references simple.)  C                 to make geographical references simple.)
164  C     rSphere   - Radius of sphere for a spherical polar grid ( m ).  C     rSphere   - Radius of sphere for a spherical polar grid ( m ).
165    C     rRSphere  - Reciprocal radius of sphere for a spherical polar grid ( m ).
166  C     f0        - Reference coriolis parameter ( 1/s )  C     f0        - Reference coriolis parameter ( 1/s )
167  C                 ( Southern edge f for beta plane )  C                 ( Southern edge f for beta plane )
168  C     beta      - df/dy ( s^-1.m^-1 )  C     beta      - df/dy ( s^-1.m^-1 )
169    C     omega     - Angular velocity ( rad/s )
170  C     viscAh    - Eddy viscosity coeff. for mixing of  C     viscAh    - Eddy viscosity coeff. for mixing of
171  C                 momentum laterally ( m^2/s )  C                 momentum laterally ( m^2/s )
172  C     viscAz    - Eddy viscosity coeff. for mixing of  C     viscAz    - Eddy viscosity coeff. for mixing of
# Line 119  C                 salt vertically ( m^2/ Line 186  C                 salt vertically ( m^2/
186  C     diffK4S   - Biharmonic diffusion coeff. for mixing of  C     diffK4S   - Biharmonic diffusion coeff. for mixing of
187  C                 salt laterally ( m^4/s )  C                 salt laterally ( m^4/s )
188  C     deltaT    - Default timestep ( s )  C     deltaT    - Default timestep ( s )
189    C     deltaTClock  - Timestep used as model "clock". This determines the
190    C                    IO frequencies and is used in tagging output. It can
191    C                    be totally different to the dynamical time. Typically
192    C                    it will be the deep-water timestep for accelerated runs.
193    C                    Frequency of checkpointing and dumping of the model state
194    C                    are referenced to this clock. ( s )
195  C     deltaTMom    - Timestep for momemtum equations ( s )  C     deltaTMom    - Timestep for momemtum equations ( s )
196  C     deltaTtracer - Timestep for tracer equations ( s )  C     deltaTtracer - Timestep for tracer equations ( s )
197    C     freesurfFac  - Parameter to turn implicit free surface term on or off
198    C                    freesurfac = 1. uses implicit free surface
199    C                    freesurfac = 0. uses rigid lid
200  C     tauCD     - CD scheme coupling timescale ( 1/s )  C     tauCD     - CD scheme coupling timescale ( 1/s )
201  C     rCD       - CD scheme normalised coupling parameter ( 0-1 )  C     rCD       - CD scheme normalised coupling parameter ( 0-1 )
202  C     GMmaxslope  - max. slope allowed in GM/Redi tensor  C     GMmaxslope  - max. slope allowed in GM/Redi tensor
203  C     GMlength  - Length to use in Visbeck et al. formula for K  C     GMlength  - Length to use in Visbeck et al. formula for K (m)
204  C     GMalpha   - alpha to use in Visbeck et al. formula for K  C     GMalpha   - alpha to use in Visbeck et al. formula for K
205  C     GMdepth   - Depth over which to integrate Richardson # (Visbeck et al.)  C     GMdepth   - Depth over which to integrate Richardson # (Visbeck et al.)
206  C     GMbackground - background value of GM/Redi coefficient  C     GMkbackground - background value of GM/Redi coefficient
207  C     startTime - Starting time for this integration ( s ).  C     startTime - Starting time for this integration ( s ).
208  C     endTime   - Ending time for this integration ( s ).  C     endTime   - Ending time for this integration ( s ).
209  C     chkPtFreq - Frequency of check pointing ( s ).  C     chkPtFreq  - Frequency of rolling check pointing ( s ).
210    C     pChkPtFreq - Frequency of permanent check pointing ( s ).
211  C     dumpFreq  - Frequency with which model state is written to  C     dumpFreq  - Frequency with which model state is written to
212  C                 post-processing files ( s ).  C                 post-processing files ( s ).
213        COMMON /PARM_R/ cg2dTargetResidual, delZ, delX, delY, deltaT,  C     afFacMom  - Advection of momentum term scaling parameter
214       & deltaTmom, deltaTtracer, abeps, startTime, phiMin, thetaMin,  C     vfFacMom  - Momentum viscosity scaling parameter
215       & rSphere, f0, fCori, beta, viscAh, viscAz, viscA4, diffKhT, diffKzT,  C     pfFacMom  - Momentum pressure forcing parameter
216       & diffK4T, diffKhS, diffKzS, diffK4S, delT, tauCD, rCD,  C     cfFacMom  - Coriolis term scaling parameter
217    C     foFacMom  - Momentum forcing scaling parameter
218    C     mtFacMom  - Metric terms scaling parameter
219    C     cAdjFreq  - Frequency of convective adjustment
220          COMMON /PARM_R/ cg2dTargetResidual, cg2dpcOffDFac, delZ, delX, delY,
221         & deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime, phiMin,
222         & thetaMin, rSphere, rRSphere, f0, fCori, beta, viscAh, viscAz, viscA4,
223         & diffKhT, diffKzT, diffK4T, diffKhS, diffKzS, diffK4S, delT,
224         & tauCD, rCD, freeSurfFac,
225       & GMmaxslope,GMlength,GMalpha,GMdepth,GMkbackground,       & GMmaxslope,GMlength,GMalpha,GMdepth,GMkbackground,
226       & gravity, rhonil, tRef, sRef,       & gravity, gBaro, rhonil, tRef, sRef,
227       & endTime, chkPtFreq, dumpFreq       & endTime, chkPtFreq, pchkPtFreq, dumpFreq,
228         & afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom, mtFacMom,
229         & cAdjFreq, omega
230        _RL cg2dTargetResidual        _RL cg2dTargetResidual
231          _RL cg2dpcOffDFac
232        _RL delZ(Nz)        _RL delZ(Nz)
233        _RL delX(Nx)        _RL delX(Nx)
234        _RL delY(Ny)        _RL delY(Ny)
235        _RL deltaT        _RL deltaT
236          _RL deltaTClock
237        _RL deltaTmom        _RL deltaTmom
238        _RL deltaTtracer        _RL deltaTtracer
239        _RL abeps        _RL abeps
240        _RL phiMin        _RL phiMin
241        _RL thetaMin        _RL thetaMin
242        _RL rSphere        _RL rSphere
243          _RL rRSphere
244        _RL f0        _RL f0
245          _RL freeSurfFac
246        _RL beta        _RL beta
247        _RL viscAh        _RL viscAh
248        _RL viscAz        _RL viscAz
# Line 171  C                 post-processing files Line 262  C                 post-processing files
262        _RL GMdepth        _RL GMdepth
263        _RL GMkbackground        _RL GMkbackground
264        _RL gravity        _RL gravity
265          _RL gBaro
266        _RL rhonil        _RL rhonil
267        _RL tRef(Nz)        _RL tRef(Nz)
268        _RL sRef(Nz)        _RL sRef(Nz)
269        _RL Fcori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)        _RS Fcori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
270        _RL startTime        _RL startTime
271        _RL endTime        _RL endTime
272        _RL chkPtFreq        _RL chkPtFreq
273          _RL pChkPtFreq
274        _RL dumpFreq        _RL dumpFreq
275          _RL afFacMom
276          _RL vfFacMom
277          _RL pfFacMom
278          _RL cfFacMom
279          _RL foFacMom
280          _RL mTFacMom
281          _RL cAdjFreq
282          _RL omega
283    
284        COMMON /PARM_A/ HeatCapacity_Cp,        COMMON /PARM_A/ HeatCapacity_Cp,
285       &                Lamba_theta       &                Lamba_theta
# Line 187  C                 post-processing files Line 288  C                 post-processing files
288    
289  C Equation of State (polynomial coeffients)  C Equation of State (polynomial coeffients)
290        COMMON /PARM_EOS_NL/ eosC,eosSig0,eosRefT,eosRefS        COMMON /PARM_EOS_NL/ eosC,eosSig0,eosRefT,eosRefS
291        _RL eosC(Nz+1,9),eosSig0(Nz+1),eosRefT(Nz+1),eosRefS(Nz+1)        _RL eosC(9,Nz+1),eosSig0(Nz+1),eosRefT(Nz+1),eosRefS(Nz+1)
292  C Linear equation of state  C Linear equation of state
293  C     tAlpha    - Linear EOS thermal expansion coefficient ( 1/degree ).  C     tAlpha    - Linear EOS thermal expansion coefficient ( 1/degree ).
294  C     sBeta     - Linear EOS haline contraction coefficient.  C     sBeta     - Linear EOS haline contraction coefficient.
295        COMMON /PARM_EOS_LIN/ tAlpha,sBeta        COMMON /PARM_EOS_LIN/ tAlpha,sBeta,eosType
296        _RL tAlpha        _RL tAlpha
297        _RL sBeta        _RL sBeta
298          character*(6) eosType
299    
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