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C $Header: /u/gcmpack/models/MITgcmUV/model/inc/PARAMS.h,v 1.8 1998/05/25 16:17:36 cnh Exp $ |
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C |
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C /==========================================================\ |
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C | PARAMS.h | |
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C | o Header file defining model "parameters". | |
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C |==========================================================| |
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C | The values from the model's standard input file are | |
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C | stored into the variables held here. Notes describing | |
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C | the parameters can also be found here. | |
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C \==========================================================/ |
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|
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C-- Contants |
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C Useful physical values |
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Real*8 PI |
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PARAMETER ( PI = 3.14159265358979323844D0 ) |
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Real*8 deg2rad |
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PARAMETER ( deg2rad = 2.D0*PI/360.D0 ) |
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|
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C Symbolic values |
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C precXXXX - Used to indicate what precision to use for |
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C dumping model state. |
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INTEGER precFloat32 |
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PARAMETER ( precFloat32 = 0 ) |
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INTEGER precFloat64 |
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PARAMETER ( precFloat64 = 1 ) |
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|
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C Checkpoint data |
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INTEGER maxNoChkptLev |
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PARAMETER ( maxNoChkptLev = 2 ) |
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|
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C-- COMMON /PARM_C/ Character valued parameters used by the model. |
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C checkPtSuff - List of checkpoint file suffices |
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COMMON /PARM_C/ checkPtSuff |
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CHARACTER*(5) checkPtSuff(maxNoChkptLev) |
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|
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C-- COMMON /PARM_I/ Integer valued parameters used by the model. |
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C cg2dMaxIters - Maximum number of iterations in the |
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C two-dimensional con. grad solver. |
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C cg2dChkResFreq - Frequency with which to check residual |
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C in con. grad solver. |
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C nIter0 - Start time-step number of for this run |
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C nTimeSteps - Number of timesteps to execute |
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C numStepsPerPickup - For offline setup. Frequency of pickup |
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C of flow fields. |
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C writeStatePrec - Precision used for writing model state. |
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C writeBinaryPrec - Precision used for writing binary files |
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C readBinaryPrec - Precision used for reading binary files |
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C nCheckLev - Holds current checkpoint level |
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COMMON /PARM_I/ |
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& cg2dMaxIters, |
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& cg2dChkResFreq, |
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& nIter0, nTimeSteps, |
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& numStepsPerPickup, |
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& writeStatePrec, nCheckLev, |
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& writeBinaryPrec, readBinaryPrec |
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INTEGER cg2dMaxIters |
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INTEGER cg2dChkResFreq |
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INTEGER nIter0 |
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INTEGER nTimeSteps |
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INTEGER numStepsPerPickup |
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INTEGER writeStatePrec |
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INTEGER writeBinaryPrec |
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INTEGER readBinaryPrec |
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INTEGER nCheckLev |
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|
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C-- COMMON /PARM_L/ Logical valued parameters used by the model. |
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C usingCartesianGrid - If TRUE grid generation will be in a cartesian |
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C coordinate frame. |
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C usingSphericalPolarGrid - If TRUE grid generation will be in a |
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C spherical polar frame. |
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C momViscosity - Flag which turns momentum friction terms on and off. |
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C momAdvection - Flag which turns advection of momentum on and off. |
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C momForcing - Flag which turns external forcing of momentum on |
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C and off. |
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C momPressureForcing - Flag which turns pressure term in momentum equation |
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C on and off. |
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C useCoriolis - Flag which turns the coriolis terms on and off. |
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C tempDiffusion - Flag which turns diffusion of temperature on |
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C and off. |
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C tempAdvection - Flag which turns advection of temperature on |
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C and off. |
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C tempForcing - Flag which turns external forcing of temperature on |
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C and off. |
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C saltDiffusion - Flag which turns diffusion of salinit on |
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C and off. |
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C saltAdvection - Flag which turns advection of salinit on |
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C and off. |
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C saltForcing - Flag which turns external forcing of salinit on |
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C and off. |
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C implicitFreeSurface - Set to true to use implcit free surface |
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C rigidLid - Set to true to use rigid lid |
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COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid, |
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& momViscosity, momAdvection, momForcing, useCoriolis, momPressureForcing, |
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& tempDiffusion, tempAdvection, tempForcing, |
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& saltDiffusion, saltAdvection, saltForcing, |
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& implicitFreeSurface, rigidLid |
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LOGICAL usingCartesianGrid |
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LOGICAL usingSphericalPolarGrid |
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LOGICAL momViscosity |
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LOGICAL momAdvection |
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LOGICAL momForcing |
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LOGICAL momPressureForcing |
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LOGICAL useCoriolis |
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LOGICAL tempDiffusion |
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LOGICAL tempAdvection |
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LOGICAL tempForcing |
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LOGICAL saltDiffusion |
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LOGICAL saltAdvection |
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LOGICAL saltForcing |
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LOGICAL implicitFreeSurface |
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LOGICAL rigidLid |
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|
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C-- COMMON /PARM_R/ "Real" valued parameters used by the model. |
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C cg2dTargetResidual |
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C - Target residual for cg2d solver. |
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C cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal. |
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C Note. 20th May 1998 |
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C I made a weird discovery! In the model paper we argue |
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C for the form of the preconditioner used here ( see |
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C A Finite-volume, Incompressible Navier-Stokes Model |
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C ...., Marshall et. al ). The algebra gives a simple |
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C 0.5 factor for the averaging of ac and aCw to get a |
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C symmettric pre-conditioner. By using a factor of 0.51 |
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C i.e. scaling the off-diagonal terms in the |
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C preconditioner down slightly I managed to get the |
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C number of iterations for convergence in a test case to |
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C drop form 192 -> 134! Need to investigate this further! |
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C For now I have introduced a parameter cg2dpcOffDFac which |
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C defaults to 0.51 but can be set at runtime. |
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C delZ - Vertical grid spacing ( m ) - delZ is the distance |
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C between "w" surfaces. |
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C delX - Separation between cell faces (m) or (deg), depending |
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C delY on input flags. |
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C gravity - Accel. due to gravity ( m/s^2 ) |
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C gBaro - Accel. due to gravity used in barotropic equation ( m/s^2 ) |
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C ronil - Reference density |
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C startTime - Start time for model ( s ) |
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C phiMin - Latitude of southern most cell face. |
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C thetaMin - Longitude of western most cell face (this |
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C is an "inert" parameter but it is included |
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C to make geographical references simple.) |
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C rSphere - Radius of sphere for a spherical polar grid ( m ). |
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C f0 - Reference coriolis parameter ( 1/s ) |
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C ( Southern edge f for beta plane ) |
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C beta - df/dy ( s^-1.m^-1 ) |
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C viscAh - Eddy viscosity coeff. for mixing of |
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C momentum laterally ( m^2/s ) |
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C viscAz - Eddy viscosity coeff. for mixing of |
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C momentum vertically ( m^2/s ) |
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C viscA4 - Biharmonic viscosity coeff. for mixing of |
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C momentum laterally ( m^4/s ) |
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C diffKhT - Laplacian diffusion coeff. for mixing of |
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C heat laterally ( m^2/s ) |
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C diffKzT - Laplacian diffusion coeff. for mixing of |
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C heat vertically ( m^2/s ) |
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C diffK4T - Biharmonic diffusion coeff. for mixing of |
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C heat laterally ( m^4/s ) |
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C diffKhS - Laplacian diffusion coeff. for mixing of |
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C salt laterally ( m^2/s ) |
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C diffKzS - Laplacian diffusion coeff. for mixing of |
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C salt vertically ( m^2/s ) |
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C diffK4S - Biharmonic diffusion coeff. for mixing of |
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C salt laterally ( m^4/s ) |
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C deltaT - Default timestep ( s ) |
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C deltaTClock - Timestep used as model "clock". This determines the |
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C IO frequencies and is used in tagging output. It can |
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C be totally different to the dynamical time. Typically |
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C it will be the deep-water timestep for accelerated runs. |
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C Frequency of checkpointing and dumping of the model state |
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C are referenced to this clock. ( s ) |
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C deltaTMom - Timestep for momemtum equations ( s ) |
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C deltaTtracer - Timestep for tracer equations ( s ) |
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C freesurfFac - Parameter to turn implicit free surface term on or off |
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C freesurfac = 1. uses implicit free surface |
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C freesurfac = 0. uses rigid lid |
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C tauCD - CD scheme coupling timescale ( 1/s ) |
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C rCD - CD scheme normalised coupling parameter ( 0-1 ) |
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C GMmaxslope - max. slope allowed in GM/Redi tensor |
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C GMlength - Length to use in Visbeck et al. formula for K (m) |
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C GMalpha - alpha to use in Visbeck et al. formula for K |
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C GMdepth - Depth over which to integrate Richardson # (Visbeck et al.) |
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C GMkbackground - background value of GM/Redi coefficient |
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C startTime - Starting time for this integration ( s ). |
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C endTime - Ending time for this integration ( s ). |
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C chkPtFreq - Frequency of rolling check pointing ( s ). |
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C pChkPtFreq - Frequency of permanent check pointing ( s ). |
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C dumpFreq - Frequency with which model state is written to |
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C post-processing files ( s ). |
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C afFacMom - Advection of momentum term scaling parameter |
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C vfFacMom - Momentum viscosity scaling parameter |
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C pfFacMom - Momentum pressure forcing parameter |
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C cfFacMom - Coriolis term scaling parameter |
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C foFacMom - Momentum forcing scaling parameter |
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C cAdjFreq - Frequency of convective adjustment |
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COMMON /PARM_R/ cg2dTargetResidual, cg2dpcOffDFac, delZ, delX, delY, |
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& deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime, phiMin, |
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& thetaMin, rSphere, f0, fCori, beta, viscAh, viscAz, viscA4, |
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& diffKhT, diffKzT, diffK4T, diffKhS, diffKzS, diffK4S, delT, |
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& tauCD, rCD, freeSurfFac, |
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& GMmaxslope,GMlength,GMalpha,GMdepth,GMkbackground, |
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& gravity, gBaro, rhonil, tRef, sRef, |
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& endTime, chkPtFreq, pchkPtFreq, dumpFreq, |
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& afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom, |
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& cAdjFreq |
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_RL cg2dTargetResidual |
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_RL cg2dpcOffDFac |
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_RL delZ(Nz) |
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_RL delX(Nx) |
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_RL delY(Ny) |
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_RL deltaT |
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_RL deltaTClock |
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_RL deltaTmom |
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_RL deltaTtracer |
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_RL abeps |
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_RL phiMin |
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_RL thetaMin |
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_RL rSphere |
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_RL f0 |
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_RL freeSurfFac |
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_RL beta |
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_RL viscAh |
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_RL viscAz |
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_RL viscA4 |
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_RL diffKhT |
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_RL diffKzT |
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_RL diffK4T |
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_RL diffKhS |
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_RL diffKzS |
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_RL diffK4S |
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_RL delt |
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_RL tauCD |
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_RL rCD |
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_RL GMmaxslope |
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_RL GMlength |
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_RL GMalpha |
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_RL GMdepth |
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_RL GMkbackground |
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_RL gravity |
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_RL gBaro |
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_RL rhonil |
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_RL tRef(Nz) |
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_RL sRef(Nz) |
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_RL Fcori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL startTime |
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_RL endTime |
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_RL chkPtFreq |
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_RL pChkPtFreq |
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_RL dumpFreq |
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_RL afFacMom |
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_RL vfFacMom |
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_RL pfFacMom |
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_RL cfFacMom |
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_RL foFacMom |
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_RL cAdjFreq |
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|
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COMMON /PARM_A/ HeatCapacity_Cp, |
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& Lamba_theta |
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_RL HeatCapacity_Cp |
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_RL Lamba_theta |
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|
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C Equation of State (polynomial coeffients) |
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COMMON /PARM_EOS_NL/ eosC,eosSig0,eosRefT,eosRefS |
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_RL eosC(Nz+1,9),eosSig0(Nz+1),eosRefT(Nz+1),eosRefS(Nz+1) |
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C Linear equation of state |
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C tAlpha - Linear EOS thermal expansion coefficient ( 1/degree ). |
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C sBeta - Linear EOS haline contraction coefficient. |
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COMMON /PARM_EOS_LIN/ tAlpha,sBeta |
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_RL tAlpha |
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_RL sBeta |
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