/[MITgcm]/MITgcm_contrib/ksnow/press_release/code_expt/SHELFICE.h
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Revision 1.4 - (hide annotations) (download)
Mon Feb 13 15:24:16 2017 UTC (8 years, 5 months ago) by ksnow
Branch: MAIN
Changes since 1.3: +4 -2 lines
File MIME type: text/plain
update to limit melt in very thin cells

1 ksnow 1.4 C $Header: /u/gcmpack/MITgcm_contrib/ksnow/press_release/code_expt/SHELFICE.h,v 1.3 2017/02/01 12:45:48 dgoldberg Exp $
2 ksnow 1.1 C $Name: $
3    
4     #ifdef ALLOW_SHELFICE
5    
6     CBOP
7     C !ROUTINE: SHELFICE.h
8    
9     C !DESCRIPTION: \bv
10     C *==========================================================*
11     C | SHELFICE.h
12     C | o Basic header thermodnynamic shelf ice package.
13     C | Contains all SHELFICE field declarations.
14     C *==========================================================*
15    
16     C-----------------------------------------------------------------------
17     C
18     C-- Constants that can be set in data.shelfice
19     C SHELFICEtopoFile :: File containing the topography of the
20     C shelfice draught (unit=m)
21     C SHELFICEmassFile :: name of shelfice Mass file
22     C SHELFICEloadAnomalyFile :: name of shelfice load anomaly file
23     C SHELFICEMassDynTendFile :: file name for other mass tendency
24     C (e.g. dynamics)
25     C useISOMIPTD :: use simple ISOMIP thermodynamics, def: F
26     C SHELFICEconserve :: use conservative form of H&O-thermodynamics
27     C following Jenkins et al. (2001, JPO), def: F
28     C SHELFICEMassStepping :: flag to step forward ice shelf mass/thickness
29     C accounts for melting/freezing & dynamics
30     C (from file or from coupling), def: F
31     C SHELFICEDynMassOnly :: step ice mass ONLY with Shelficemassdyntendency
32     C (not melting/freezing) def: F
33     C SHELFICEboundaryLayer :: turn on vertical merging of cells to for a
34     C boundary layer of drF thickness, def: F
35     C SHELFICErealFWflux :: ensure vert advective flux at bdry uses top cell
36     C value rather than "boundary layer" value F
37     C SHELFICEadvDiffHeatFlux :: use advective-diffusive heat flux into the
38     C ice shelf instead of default diffusive heat
39     C flux, see Holland and Jenkins (1999),
40     C eq.21,22,26,31; def: F
41     C SHELFICEheatTransCoeff :: constant heat transfer coefficient that
42     C determines heat flux into shelfice
43     C (def: 1e-4 m/s)
44     C SHELFICEsaltTransCoeff :: constant salinity transfer coefficient that
45     C determines salt flux into shelfice
46     C (def: 5.05e-3 * 1e-4 m/s)
47     C -----------------------------------------------------------------------
48     C SHELFICEuseGammaFrict :: use velocity dependent exchange coefficients,
49     C see Holland and Jenkins (1999), eq.11-18,
50     C with the following parameters (def: F):
51     C shiCdrag :: quadratic drag coefficient to compute uStar
52     C (def: 0.0015)
53     C shiZetaN :: ??? (def: 0.052)
54     C shiRc :: ??? (not used, def: 0.2)
55     C shiPrandtl, shiSchmidt :: constant Prandtl (13.8) and Schmidt (2432.0)
56     C numbers used to compute gammaTurb
57     C shiKinVisc :: constant kinetic viscosity used to compute
58     C gammaTurb (def: 1.95e-5)
59     C SHELFICERemeshFrequency :: Frequency that size of etaN is checked to
60     C trigger remesh
61     C SHELFICESplitThreshold :: Max size of etaN allowed before a remesh
62     C SHELFICEMergeThreshold :: Min size of etaN allowed before a remesh
63     C -----------------------------------------------------------------------
64     C SHELFICEDragLinear :: linear drag at bottom shelfice (1/s)
65     C SHELFICEDragQuadratic :: quadratic drag at bottom shelfice (default
66     C = shiCdrag or bottomDragQuadratic)
67     C no_slip_shelfice :: set slip conditions for shelfice separately,
68     C (by default the same as no_slip_bottom, but
69     C really should be false when there is linear
70     C or quadratic drag)
71     C SHELFICElatentHeat :: latent heat of fusion (def: 334000 J/kg)
72     C SHELFICEwriteState :: enable output
73     C SHELFICEHeatCapacity_Cp :: heat capacity of ice shelf (def: 2000 J/K/kg)
74     C rhoShelfIce :: density of ice shelf (def: 917.0 kg/m^3)
75     C
76     C SHELFICE_dump_mnc :: use netcdf for snapshot output
77     C SHELFICE_tave_mnc :: use netcdf for time-averaged output
78     C SHELFICE_dumpFreq :: analoguous to dumpFreq (= default)
79     C SHELFICE_taveFreq :: analoguous to taveFreq (= default)
80     C
81     C-- Fields
82     C ktopC :: index of the top "wet cell" (2D)
83     C R_shelfIce :: shelfice topography [m]
84     C shelficeMassInit :: ice-shelf mass (per unit area) (kg/m^2)
85     C shelficeMass :: ice-shelf mass (per unit area) (kg/m^2)
86     C shelfIceMassDynTendency :: other mass balance tendency (kg/m^2/s)
87     C :: (e.g., from dynamics)
88     C shelficeLoadAnomaly :: pressure load anomaly of shelfice (Pa)
89     C shelficeHeatFlux :: upward heat flux (W/m^2)
90     C shelficeFreshWaterFlux :: upward fresh water flux (virt. salt flux)
91     C (kg/m^2/s)
92     C shelficeForcingT :: analogue of surfaceForcingT
93     C units are r_unit.Kelvin/s (=Kelvin.m/s if r=z)
94     C shelficeForcingS :: analogue of surfaceForcingS
95     C units are r_unit.psu/s (=psu.m/s if r=z)
96 ksnow 1.2 C conserve_ssh :: KS16. Use the obcs to conserve net open
97     C ocean eta to 0m
98 ksnow 1.1 C-----------------------------------------------------------------------
99     C \ev
100     CEOP
101    
102     COMMON /SHELFICE_PARMS_I/ kTopC,
103     & SHELFICEselectDragQuadr,
104     & shelfice_etarestore_spongewidth
105     INTEGER kTopC (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
106     INTEGER SHELFICEselectDragQuadr
107     INTEGER shelfice_etarestore_spongewidth
108    
109     COMMON /SHELFICE_PARMS_R/
110     & SHELFICE_dumpFreq, SHELFICE_taveFreq,
111     & SHELFICEheatTransCoeff, SHELFICEsaltTransCoeff,
112     & rhoShelfice, SHELFICEkappa,
113     & SHELFICElatentHeat,
114     & SHELFICEheatCapacity_Cp,
115     & SHELFICEthetaSurface,
116     & SHELFICEDragLinear, SHELFICEDragQuadratic,
117     & shiCdrag, shiZetaN, shiRc,
118     & shiPrandtl, shiSchmidt, shiKinVisc,
119     & SHELFICERemeshFrequency,
120     & SHELFICESplitThreshold,
121     & SHELFICEMergeThreshold,
122 ksnow 1.4 & shelficeEtaRelax,
123     & depthMinMelt
124 ksnow 1.1 _RL SHELFICE_dumpFreq, SHELFICE_taveFreq
125     _RL SHELFICEheatTransCoeff
126     _RL SHELFICEsaltTransCoeff
127     _RL SHELFICElatentHeat
128     _RL SHELFICEheatCapacity_Cp
129     _RL rhoShelfice
130     _RL SHELFICEkappa
131     _RL SHELFICEDragLinear
132     _RL SHELFICEDragQuadratic
133     _RL SHELFICEMergeThreshold
134     _RL SHELFICEthetaSurface, SHELFICESplitThreshold
135     _RL shiCdrag, shiZetaN, shiRc
136     _RL SHELFICERemeshFrequency
137     _RL shiPrandtl, shiSchmidt, shiKinVisc
138     _RL SHELFICEGroundW, SHELFICEGroundC, shelficeEtaRelax
139 ksnow 1.4 _RL depthMinMelt
140 ksnow 1.1 COMMON /SHELFICE_FIELDS_RL/
141     & shelficeMass, shelficeMassInit,
142     & shelficeLoadAnomaly,
143     & shelficeForcingT, shelficeForcingS,
144 dgoldberg 1.3 & shiTransCoeffT, shiTransCoeffS, EFFMASS
145 ksnow 1.1 _RL shelficeMass (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
146     _RL shelficeMassInit (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
147     _RL shelficeLoadAnomaly (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
148     _RL shelficeForcingT (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
149     _RL shelficeForcingS (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
150     _RL shiTransCoeffT (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
151     _RL shiTransCoeffS (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
152     _RL EFFMASS (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
153     _RL SeaLevelRestore (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
154    
155     COMMON /SHELFICE_FIELDS_RS/
156     & R_shelfIce, R_MWCT,
157     & shelficeHeatFlux,
158     & shelfIceFreshWaterFlux,
159     & shelfIceMassDynTendency
160 dgoldberg 1.3 #ifdef ALLOW_SHELFICE_GROUNDED_ICE
161     & , GrdFactor
162     #endif
163    
164 ksnow 1.1 _RS R_shelfIce (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
165     _RS R_MWCT (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
166     _RS shelficeHeatFlux (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
167     _RS shelficeFreshWaterFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
168     _RS
169     & shelfIceMassDynTendency(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
170 dgoldberg 1.3 #ifdef ALLOW_SHELFICE_GROUNDED_ICE
171     _RS GrdFactor (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
172     #endif
173 ksnow 1.1
174     #ifdef ALLOW_SHIFWFLX_CONTROL
175     COMMON /SHELFICE_MASKS_CTRL/ maskSHI
176     _RS maskSHI (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
177     #endif /* ALLOW_SHIFWFLX_CONTROL */
178    
179     LOGICAL SHELFICEisOn
180     LOGICAL useISOMIPTD
181     LOGICAL SHELFICEconserve
182     LOGICAL SHELFICEboundaryLayer
183     LOGICAL SHELFICEthickBoundaryLayer
184     LOGICAL SHELFICErealFWflux
185     LOGICAL no_slip_shelfice
186     LOGICAL SHELFICEwriteState
187     LOGICAL SHELFICE_dump_mdsio
188     LOGICAL SHELFICE_tave_mdsio
189     LOGICAL SHELFICE_dump_mnc
190     LOGICAL SHELFICE_tave_mnc
191     LOGICAL SHELFICEadvDiffHeatFlux
192     LOGICAL SHELFICEuseGammaFrict
193     LOGICAL SHELFICEMassStepping
194     LOGICAL SHELFICEDynMassOnly
195     LOGICAL SHELFICEEtaSponge
196     LOGICAL SHELFICE_dig_ice
197     LOGICAL SHELFICE_massmin_truedens
198     C KS16 put var here
199     LOGICAL conserve_ssh
200     COMMON /SHELFICE_PARMS_L/
201     & SHELFICEisOn,
202     & useISOMIPTD,
203     & SHELFICEconserve,
204     & SHELFICErealFWflux,
205     & SHELFICEboundaryLayer,
206     & SHELFICEthickBoundaryLayer,
207     & no_slip_shelfice,
208     & SHELFICEwriteState,
209     & SHELFICE_dump_mdsio,
210     & SHELFICE_tave_mdsio,
211     & SHELFICE_dump_mnc,
212     & SHELFICE_tave_mnc,
213     & SHELFICEadvDiffHeatFlux,
214     & SHELFICEuseGammaFrict,
215     & SHELFICEMassStepping,
216     & SHELFICEDynMassOnly,
217     & SHELFICEEtaSponge,
218     & SHELFICE_dig_ice,
219 ksnow 1.2 & SHELFICE_massmin_truedens,
220 ksnow 1.1 C KS16 and here;
221 dgoldberg 1.3 & conserve_ssh
222 ksnow 1.1
223     CHARACTER*(MAX_LEN_FNAM) SHELFICEloadAnomalyFile
224     CHARACTER*(MAX_LEN_FNAM) SHELFICEmassFile
225     CHARACTER*(MAX_LEN_FNAM) SHELFICEGroundTopoFile
226     CHARACTER*(MAX_LEN_FNAM) SHELFICEtopoFile
227     CHARACTER*(MAX_LEN_FNAM) SHELFICEMassDynTendFile
228     CHARACTER*(MAX_LEN_FNAM) SHELFICEGroundInitFile
229     CHARACTER*(MAX_LEN_FNAM) SHELFICETransCoeffTFile
230 ksnow 1.2
231 ksnow 1.1
232     COMMON /SHELFICE_PARM_C/
233     & SHELFICEloadAnomalyFile,
234     & SHELFICEmassFile,
235     & SHELFICEtopoFile,
236     & SHELFICEGroundTopoFile,
237     & SHELFICEMassDynTendFile,
238     & SHELFICEGroundInitFile,
239 ksnow 1.2 & SHELFICETransCoeffTFile
240 ksnow 1.1
241     #endif /* ALLOW_SHELFICE */

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