Update on CICE activities
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1 CLIMATE, OCEAN AND SEA ICE MODELING PROGRAM Update on CICE activities Elizabeth Hunke October 30, 2009
2 Outline 1 The Current State of the Model 2 Community Development Examples 3 LANL Development
3 Outline 1 The Current State of the Model 2 Community Development Examples 3 LANL Development
4 CICE 3.14 August 2006 version 3.14 energy conserving, multi-layer thermodynamics ice thickness distribution with 5 categories and open water variables/tracers (for each thickness category): ice area fraction ice/snow volume in each vertical layer ice/snow energy in each vertical layer surface temperature elastic-viscous-plastic (EVP) dynamics incremental remapping advection energy-based, multi-category ridging and ice strength Fortran 90 nonuniform, curvilinear, logically rectangular grids parallelization via the Message Passing Interface (MPI) netcdf or binary input/output users in many countries, dozens of institutions
5 CICE 4.0 August 2008 version 3.14 version 4.0 energy conserving, multi-layer thermodynamics multi-layer snow ice thickness distribution with 5 categories and open water multiple-scattering radiation variables/tracers (for each thickness category): ice area fraction ice age ice/snow volume in each vertical layer melt ponds ice/snow energy in each vertical layer surface temperature elastic-viscous-plastic (EVP) dynamics incremental remapping advection energy-based, multi-category ridging and ice strength Fortran 90 nonuniform, curvilinear, logically rectangular grids parallelization via the Message Passing Interface (MPI) netcdf or binary input/output users in many countries, dozens of institutions tripole grids regional configuration cache-based decomposition more coupling/forcing options available to collaborators through subversion repository
6 CICE October 2009 version 3.14 version 4.0 energy conserving, multi-layer thermodynamics multi-layer snow ice thickness distribution with 5 categories and open water multiple-scattering radiation variables/tracers (for each thickness category): ice area fraction ice age ice/snow volume in each vertical layer melt ponds ice/snow energy in each vertical layer algal ecosystem surface temperature icebergs 3D salinity elastic-viscous-plastic (EVP) dynamics incremental remapping advection energy-based, multi-category ridging and ice strength Fortran 90 nonuniform, curvilinear, logically rectangular grids parallelization via the Message Passing Interface (MPI) netcdf or binary input/output users in many countries, dozens of institutions tripole grids regional configuration cache-based decomposition more coupling/forcing options multi-frequency history output available to collaborators through subversion repository CICE wiki:
7 Outline 1 The Current State of the Model 2 Community Development Examples 3 LANL Development
8 Operational Forecasting/Data Assimilation Naval Research Laboratory
9 Melt Pond Physics University College London h sl h surf α Thro area o meltw signif avera cover β Figure 1: Sea ice topography.
10 Aerosol Deposition and Cycling National Center for Atmospheric Research Aerosol cycling implementation Snow SSL (4cm) Snow Interior Ice SSL (5cm) Ice Interior Four aerosol reservoirs in the vertical Aerosol cycling due to ice transport, vertical melt/growth Melt water scavenging Six aerosols 2 black carbon (hydrophilic/phobic), 4 dust Currently affects radiative transfer Receiving aerosol deposition from CAM Near term (months) work will link to ocean iron deposition
11 Grease and Frazil Ice Bjerknes Centre for Climate Research, Norway
12 EVP on the C-grid Alfred Wegener Institute for MITgcm
13 Tripole T-fold Option U.K. Hadley Centre/University of Reading
14 CICE on an Unstructured Grid University of Massachusetts
15 Outline 1 The Current State of the Model 2 Community Development Examples 3 LANL Development
16 Prognostic salinity Brine inclusions Cecilia Bitz University of Washington
17 Prognostic salinity Brine inclusions Cecilia Bitz University of Washington Adrian Turner University College London (now) LANL (Jan 2010)
18 Prognostic salinity Brine inclusions Cecilia Bitz University of Washington Adrian Turner University College London (now) LANL (Jan 2010) Wang Xiucheng Chinese Academy of Sciences
19 Sea Ice Ecosystem Scott Elliott Nicole Jeffery Mat Maltrud Elizabeth Hunke Los Alamos National Laboratory Clara Deal Meibing Jin IARC, U. of Alaska, Fairbanks
20 Sea Ice Ecosystem stand-alone CICE WOA nutrient climatology nitrate, silicate, ammonium, DMS(P) limiting by light, nutrients, melting coupled POP-CICE ecosystem in progress
21 Vertical Transport Nicole Jeffery
22 Ice-ocean dynamic coupling approaches ocean-ice stress τ w = drag coef quadratic f (U o U i ) 1 ice-ocean stress = (ocean-ice stress) 2 ice-ocean stress = div(ice internal stress) + wind stress 3 various levels of "embedding" 4 variable drag coef 5 resolution of ocean boundary layer
23 Ice-ocean dynamic coupling approaches ocean-ice stress τ w = drag coef quadratic f (U o U i ) 1 ice-ocean stress = (ocean-ice stress) 2 ice-ocean stress = div(ice internal stress) + wind stress 3 various levels of "embedding" 4 variable drag coef 5 resolution of ocean boundary layer How much is necessary for climate modeling?
24 Icebergs in CICE Lagrangian particles with finite size Berg momentum balance includes Coriolis, tilt, wind/ocean stresses, sea-ice dynamic interaction Sea ice ridging, momentum balance include berg interaction E. Hunke
25 Icebergs in CICE Lagrangian particles with finite size Berg momentum balance includes Coriolis, tilt, wind/ocean stresses, sea-ice dynamic interaction Sea ice ridging, momentum balance include berg interaction Change in sea ice thickness due to bergs, cm E. Hunke
26 Snow compaction and densification granularization moisture transport wind redistribution slush and snow-ice...
27 Snow compaction and densification granularization moisture transport wind redistribution slush and snow-ice... Help needed!
28 Sea Ice Constitutive Modeling Now: Elastic-viscous-plastic (EVP) Compare: Newton-Krylov solver for viscous-plastic Future: Elastic-decohesive implementation?
29 Sea Ice Constitutive Modeling Now: Elastic-viscous-plastic (EVP) Compare: Newton-Krylov solver for viscous-plastic Future: Elastic-decohesive implementation? Help needed!
30 Summary: CICE 4.0 Development Community Efforts data assimilation physical parameterizations numerical implementations LANL Efforts prognostic salinity, ice hydrology ecosystem icebergs ice-ocean coupling constitutive modeling snow
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