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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")
    • 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

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

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)
    • Phaeocystis and trace gas module
    • organic carbon
    • methane
    • ice and ocean BGC coupling
  • Coupling of trace gas and organics with atmosphere (Shanlin Wang) – 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)
  • CDOM (radiative transfer to ocean)



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