v2 code needs to be in repo and verified ~1 year from now.

This page is a reduction of the/wiki/spaces/OCNICE/pages/30442728.

Each section (ocean, sea-ice, land-ice, coastal, coupler) get 15 minutes.

Goal of each 15 minute segment is:

1. to ID the most important v2 feature(s)
2. ID who is willing take the lead in pulling together a design document for feature(s)

ocean (Mark Petersen)

• performance (Philip Jones)
  
  • Change number of layers to 64 or 128 for vector performance
  • Always loop vertically to nVertLevels, or multiples of 8, with a mask ("Strip-mining")

  • Remove all allocatable arrays for GPUs: change scratch arrays to permanent arrays.

  • reduce excessive diagnostics computations, other items, see: /wiki/spaces/OCNICE/pages/82673686
• analysis
  
  • Continued work on analysis members and MPAS Analysis
  • smooth automated implementation in ACME, working at high resolution.
• Sea-Level Rise Topic
• non-Boussinseq / TEOS-10 (Mark Petersen)
  
  • needed for steric SLR
  • expected for next generation ocean models
• wetting-drying / massless layers (Xylar Asay-Davis)
  
  • needed for ocean / land-ice coupling, moving grounding line
  • needed for coastal inundation
• high-order pressure gradient (Mark Petersen)
  
  • mitigates errors associated with strongly sloped layer interfaces
• quasi-Lagrangian vertical coordinate (regridding/remapping, hybrid vertical coordinates) (Luke Van Roekel (Unlicensed))
  
  • exploits a capability built into MPAS-Ocean
  • should improve representation / preservation of water masses
• super-cycling of tracer transport
  • needed to make BGC more computationally tractable
• Mesoscale eddy closure
  • funded by SciDAC3, in code base, needed to be validated in global configurations
• thin-wall approach for bottom bathymetry
  • a great idea that we never have time to implement
• improved vertical turbulence scheme (Luke Van Roekel (Unlicensed))
  
  • needed to get beyond KPP
• prognostic SW penetration model (LV notes: mostly done already, just needs hooks to BGC)
  
  • needed to improve ocean boundary layer representation

sea-ice (Adrian Turner)

• Improved snow model (Nicole Jeffery)
• icepack support (Elizabeth Hunke (Unlicensed))
  
• Icebergs (postdoc)
  
• Unified ridging and form drag (with Andrew Roberts, NPS?) (@Andrew Roberts)
  
• Improved radiation extinction in snow (SNCR)*
• MPAS-Seaice buoy simulator
• Improve salinity coupling between ocean and sea ice (postdoc)
  
• Remaining sea ice metrics for coupled simulations (2/9 completed) (Adrian Turner)
  
• Performance enhancements
  • Concurrent halo exchanges (Philip Jones)
    
  • Equatorial grid culling in coupler (Jon Wolfe)
  
  

land-ice (Stephen Price)

• analysis and validation (standalone and coupled) (Stephen Price)
  
• improved calving*
• spin up initialization
• Sub-glacial hydrology and basal processes (Matt Hoffman)
  
• Spatially-temporally varying sea-level forcing at land ice front

coupler (Jeremy Fyke (Unlicensed))

• Schematic
• Couple icebergs from land ice to sea ice via coupler (coordination with land ice, sea ice, ocean) (Jeremy Fyke (Unlicensed), Darin Comeau)
  
• time-variable footprint of land / ocean / sea-ice / atmosphere / land - "dynamic fractions" (coordination with land ice, ocean, sea ice, land) (Jeremy Fyke (Unlicensed))
  
• finalization/testing of boundary layer melt scheme in coupler (coordination with land ice and ocean) (Jeremy Fyke (Unlicensed))
  
• test existing subgrid downscaling for land SMB fields to high-res ice sheet grid (coordination with land ice, land) *
  
• Self-attraction for regional SLR
  
• track coupler re-write (all coupler efforts need to be coordinated w/ R. Jacob and coupler re-write team)
  

coastal ocean / coastal BGC (Phillip Wolfram (Unlicensed))

• Tides (Phillip J. Wolfram, Joseph Zhang (Unlicensed))
  
  • needed for estuary modeling project
  • global / regional
    
• Variable time step (Max Gunzburger (Unlicensed))
  
  • would allow two-way coupling of open to coastal system models
  • key performance opportunity
  • Implicit / explicit tradeoffs
• Land inundation (Xylar Asay-Davis)
  
  • wetting / drying between land and free surface (see also ocean-ice sheet wetting / drying)
  • coordinate w/ land ice effort
• Surface wave model (Phillip Wolfram (Unlicensed))
  
  • needed for inundation modeling
  • needed for improved ocean boundary layer modeling
• Coastal BGC - Coupled river-estuary-coastal ocean reaction eqs.
  • includes inorganic carbon chemistry
  • extending BGC into the coastal ocean system
• Sediment transport
  • needed for the evolution of the coastline and BGC processes
• coordination with marine BGC effort

Marine BGC 

• MARBL into MPAS-O (including new processes in MARBL (isotope module, different complexities, pH-depended CaCO3 dissolution) (Jon Wolfe)
• Bring MARBL up to date with ACME.v1/POP (Shanlin Wang (Unlicensed))
  • Phaeocystis and trace gas module
  • organic carbon
  • methane
  • ice and ocean BGC coupling
• Coupling of trace gas and organics with atmosphere (Shanlin Wang (Unlicensed)) – need atmos. counterpart
• CFCs into MPAS-O (Mathew Maltrud)
• BGC analysis members/metrics for MPAS-seaice (Nicole Jeffery)
  
• BGC analysis members/metrics for MPAS-O (Shanlin Wang (Unlicensed))
• CDOM (radiative transfer to ocean)
• coordination with coastal