Page Comparison

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• Expect to use last 30 min for discussions with Chris Golaz on how to best support coupled model with alpha9 / alpha10 / beta1 (discuss process)

• Mathew Maltrud discussed eddy closure 60to30 runs for low-res water cycle / BGC (/wiki/spaces/OCNICE/pages/102039847)
  
  • ocean-ice core circulations having trouble to have robust meridional overturning circulation (MOC) without salinity restoring
  • some improvement with salinity restoring, but additional strength of restoring may be required as demonstrated from RAPID array
    
  • increase in piston velocity reduces drift in salinity
    
  • note, no ocean model in world that doesn't require salinity restoring (e.g., precipitation independent of ocean model without feedback); debate continues over use of restoring timescale
  • sea surface temperature drift is minimal, no restoring needed for sst
  • minimal cost at higher resolution (1440 cores on eos, 6 SYD)
  • BGC version only run for 1 yr, can couple 1 to 2 way with sea ice BGC to add 3-4 cost in individual components above physics-only configuration.  Configurations current in testing by Shanlin Wang (Unlicensed) with Keith Moore et al
• MARBL SciDac project with NCAR with Matt Long for v2
  
• Hard to get anything higher resolution than 60to30 through queue at reasonable SYD because of queue times and node failures
• 16to5 and 18to6 have gone through a few times at 64k processors
• David C. Bader: "don't submit additional jobs on titan (beside Mathew Maltrud and Jon Wolfe)"

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• Todd Ringler (Unlicensed): science papers
  • papers compelling and ready to be written but they are awaiting simulation data (esp. high profile papers)
    
  • model development papers already started
  • many papers can be written with CORE-II G case
  • goal is to move to coupled system dynamics, e.g., Julie McClean's Indian dipole paper requires high-res coupled model
    
  • Are simulations producing data needed to write papers? 
    
  • Should be working on model development and writing papers concurrently
    

• v2/v3 Development /wiki/spaces/OCNICE/pages/30442728 (activities not necessarily staged, but needs to be done following aging of v1 activities)
  
  • Ocean
    • maintenance
    • comp Phys
    • vertical coord.
    • mesoscale eddy closure
    • improved transport scheme (LEAP- reasonably well but struggles with consistency and algorithmic issues for horizontal / vertical transport); performance still challenge but surmountable
  • Land ice
    
    • wetting / drying
    • sea level change issues
      • self attraction
      • isostatic effects
    • improved calving schemes (physics-based for advance / retreat of front)
      
    • improved spin-ups / initialization techniques
    • improve basal boundary condition with subglacial hydrology changing which parts of ice sheet discharge into ocean
      
  • Coastal modeling
    
    • 2 new university projects tied to MPAS-Coastal
    • hope is to build out coastal modeling capability over 3-5 years (streams of funding outside ACME likely)
    • ACME sea level rise impacts require MPAS-Coastal
    • wave model interesting at higher resolution (e.g., storm surge needed)
      
    • BGC
      
  • Next gen arch.
  • Sea ice
    • snow model
    • changes needed for advancing front for land ice / sea ice interaction (e.g., ice bergs)
    • ice bergs / sea ice buoy simulator
      
  • coupling
    • salt transfer from ocean to sea ice to be improved
    • wetting / drying needed for dynamic land ice / foot print of ice sheet to change and accommodate changing sea ice, ocean, atmospheric interactions