Changeset 1214 for TI01-discovery
- Timestamp:
- 16/06/06 16:43:41 (13 years ago)
- Location:
- TI01-discovery/trunk/schema/numsim/NMM/higem
- Files:
-
- 2 edited
-
HiGEM_HADGEM_6.1_control.xml (modified) (4 diffs)
-
NMMModel_higem.xml (modified) (2 diffs)
Legend:
- Unmodified
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- Removed
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TI01-discovery/trunk/schema/numsim/NMM/higem/HiGEM_HADGEM_6.1_control.xml
r1169 r1214 170 170 </NS_Description> 171 171 </NS_Component> 172 </NS_Component> 173 <!-- OCEAN --> 174 <NS_Component> 172 </NS_Component> 173 <NS_Component><!-- OCEAN --> 175 174 <NS_Name>Ocean</NS_Name> 176 175 <NS_ComponentType>Ocean</NS_ComponentType> … … 183 182 The atmospheric timestep period is 20 minutes (72 timesteps per 1 days). 184 183 The ocean GCM includes a polar island as standard. 184 The ocean GCM uses the McDougall equation of state. 185 185 </NS_Description> 186 186 <NS_References> … … 195 195 The option to use upwind advection in the bottom gridcell at each point avoids instabilities found in high resolution runs. 196 196 The Griffies diffusion scheme orientates the mixing tensor to lie along isopycnal rather than horizontal sufarces (Griffies et al., 1998). 197 Isopycnal diffusivity is 5.00e+02 m*m/sand is constant with depth.197 Isopycnal diffusivity is 5.00e+02 (m*m/s) and is constant with depth. 198 198 The Gent and McWilliams (GM) Scheme parametrises the effect of mesoscale eddies on tracer transports. 199 199 The Visbeck scheme allows the diffusivity for the GM scheme to be spatially and temporally variable, … … 285 285 </NS_Description> 286 286 </NS_Component> 287 </NS_Component> 288 <NS_Component> 287 </NS_Component> 288 <NS_Component><!-- SEA ICE (part of ocean scheme really)--> 289 289 <NS_Name>Sea Ice</NS_Name> 290 290 <NS_ComponentType>Cryosphere</NS_ComponentType> 291 <NS_Description> </NS_Description> 291 <NS_Description><!-- Sea Ice --> 292 The prognostic sea ice model contains ice thermodynamics based on 293 Semtner's "zero-layer" and calculates prognostic ice depth, ice concentration and snow depth. 294 The multiple ice categories model allows the sub-grid scale ice thickness distribution to be represented. 295 The EVP (elastic-viscous-plastic) dynamics based on Hibler's sea-ice rheology calculates velocities 296 that are used to advect sea-ice. 297 A north polar island is included and sea ice can be advected over it. 298 </NS_Description> 292 299 <NS_References> 293 <NS_Reference> </NS_Reference> 300 <NS_Reference> 301 Semtner, A. J., 1976: 302 A model for the thermodynamic growth of sea ice in numerical investigations of climate. 303 J. Phys. Oceanogr., 6, 379-389. 304 </NS_Reference> 305 <NS_Reference> 306 Hibler, W. D., 1979: Dynamic Thermodynamic Sea Ice Model. 307 Journal of Physical Oceanography, 9(4), 815-846. 308 </NS_Reference> 294 309 </NS_References> 310 <NS_Component><!-- Sea Ice Thermodynamics --> 311 <NS_Name>Sea Ice Thermodynamics</NS_Name> 312 <NS_ComponentType>Cryosphere</NS_ComponentType> 313 <NS_Description> 314 Ocean to ice heat flux parameterisation uses the 'McPhee scheme' 315 (McPhee, 1992), which uses both the ocean-ice temperature difference and 316 the friction velocity in the flux parameterisation. 317 The 'McPhee scheme' produces a flux proportional to the ice concentration 318 above a marginal sea ice concentration of 0.05. For lower concentrations, 319 the heat flux is constant. 320 321 Number of sea ice categories is 5. 322 Minimum local ice depth is 0.1 m. 323 Min local snow thickness: 1.0E-5 m 324 Min local thickness of new ice growing in leads: 0.05m 325 </NS_Description> 326 <NS_References> 327 <NS_Reference> 328 McPhee, M. G., 1992: Turbulent heat-flux in the upper ocean under sea ice. 329 Journal of Geophysical Research-Oceans, 97(C4), 5365-5379. 330 </NS_Reference> 331 <NS_Reference> 332 Maykut G. A., M.G. McPhee, 1995: Solar heating of the Arctic mixed layer 333 Journal of Geophysical Research-Oceans, 100(C12), 24691-24703. 334 </NS_Reference> 335 </NS_References> 336 </NS_Component> 337 <NS_Component><!-- Sea Ice Dynamics --> 338 <NS_Name>Sea Ice Dynamics</NS_Name> 339 <NS_ComponentType>Cryosphere</NS_ComponentType> 340 <NS_Description> 341 The sea ice velocity arises from a balance of windstress, ocean drag, coriolis and internal ice stresses. 342 It is based on the viscous-plastic sea-ice rheology of Hibler (1979), and recommended for use in 343 climate modelling by the Sea Ice Model Intercomparison Project [Kreyscher et al, 2000]. 344 Convergence of ice is impeded or prevented when the ice is thick. 345 The ice ridging scheme converts thinner ice to thicker ice, and if the ice is converging, the scheme 346 ensures that enough ice ridges to keep the ice concentration equal or below 1 (Hunke and Lipscomb). 347 348 Maximum compressive strength of ice per unit thickness is 2.00e+04 (N/m**2) 349 Ice strength is smoothed to avoid instabilities at high northern latitudes polewards of 87.5 lat.. 350 Ice velocities are filtered at high northern latiitudes to prevent excessive ridging and buildup of ice. 351 The Quadratic ice-ocean drag coefficient is 1.50e-02 352 </NS_Description> 353 <NS_References> 354 <NS_Reference> 355 Hibler, W. D., 1979: Dynamic Thermodynamic Sea Ice Model. 356 Journal of Physical Oceanography, 9(4), 815-846. 357 </NS_Reference> 358 <NS_Reference> 359 Kreyscher M et al., 2000: Results of the Sea Ice Model Intercomparison Project: 360 Evaluation of sea ice rheology schemes for use in climate simulations 361 Journal of Geophysical Research-Oceans, 105 (C5): 11299-11320. 362 </NS_Reference> 363 <NS_Reference> 364 Thorndike, A. S., D. A. Rothrock, G. A. Maykut et al., 1975: 365 Thickness Distribution of Sea Ice. 366 Journal fo Geophysical Research-Oceans and Atmosphereres, 80(33), 4501-4513. 367 </NS_Reference> 368 <NS_Reference> 369 Flato, G. M. and W. D. Hibler, 1995: 370 Ridging and strength in modeling the thickness distribution of arctic sea-ice. 371 Journal of Geophysical Research-Oceans, 100 (C9), 18611-18626. 372 </NS_Reference> 373 <NS_Reference> 374 Lipscomb, W.H. and E. C. Hunke, 2004: Modeling sea ice transport using incremental remapping. 375 Monthly Weather Review, 132 (6), 1341-1354. 376 </NS_Reference> 377 </NS_References> 378 </NS_Component> 295 379 </NS_Component> 296 380 <NS_Component> 297 381 <NS_Name>Atmos-Ocean Coupler</NS_Name> 298 382 <NS_ComponentType>Coupler</NS_ComponentType> 299 <NS_Description> </NS_Description> 383 <NS_Description> 384 </NS_Description> 300 385 </NS_Component> 301 386 </NS_Model> -
TI01-discovery/trunk/schema/numsim/NMM/higem/NMMModel_higem.xml
r1169 r1214 2904 2904 <modificationReason></modificationReason> 2905 2905 </modifiedFromStandard> 2906 <references></references> 2906 <references> 2907 <reference> 2908 Semtner, A. J., 1976: 2909 A model for the thermodynamic growth of sea ice in numerical investigations of climate. 2910 J. Phys. Oceanogr., 6, 379-389. 2911 </reference> 2912 <reference> 2913 Hibler, W. D., 1979: Dynamic Thermodynamic Sea Ice Model. 2914 Journal of Physical Oceanography, 9(4), 815-846. 2915 </reference> 2916 <reference> 2917 McPhee, M. G., 1992: Turbulent heat-flux in the upper ocean under sea ice. 2918 Journal of Geophysical Research-Oceans, 97(C4), 5365-5379. 2919 </reference> 2920 <reference> 2921 Maykut G. A., M.G. McPhee, 1995: Solar heating of the Arctic mixed layer 2922 Journal of Geophysical Research-Oceans, 100(C12), 24691-24703. 2923 </reference> 2924 </references> 2907 2925 <parameters> 2908 2926 <!-- Ocean/ice heat flux option --> … … 3007 3025 <modificationReason></modificationReason> 3008 3026 </modifiedFromStandard> 3009 <references></references> 3027 <references> 3028 <reference> 3029 Hibler, W. D., 1979: Dynamic Thermodynamic Sea Ice Model. 3030 Journal of Physical Oceanography, 9(4), 815-846. 3031 </reference> 3032 <reference> 3033 Kreyscher M et al., 2000: Results of the Sea Ice Model Intercomparison Project: 3034 Evaluation of sea ice rheology schemes for use in climate simulations 3035 Journal of Geophysical Research-Oceans, 105 (C5): 11299-11320. 3036 </reference> 3037 <reference> 3038 Thorndike, A. S., D. A. Rothrock, G. A. Maykut et al., 1975: 3039 Thickness Distribution of Sea Ice. 3040 Journal fo Geophysical Research-Oceans and Atmosphereres, 80(33), 4501-4513. 3041 </reference> 3042 <reference> 3043 Flato, G. M. and W. D. Hibler, 1995: 3044 Ridging and strength in modeling the thickness distribution of arctic sea-ice. 3045 Journal of Geophysical Research-Oceans, 100 (C9), 18611-18626. 3046 </reference> 3047 <reference> 3048 Lipscomb, W.H. and E. C. Hunke, 2004: Modeling sea ice transport using incremental remapping. 3049 Monthly Weather Review, 132 (6), 1341-1354. 3050 </reference> 3051 </references> 3010 3052 <parameters> 3011 3053 <parameter>
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