Update from Will, Christiane, Brian

latest tag of the FVcubed dycore, last check-in

  • fvcubed_cam3_6_34_tags/fvcubed21_cam3_6_34

issues in the current FVcubed dycore (parallelization, performance)

  • Extensive problems on Jaguar (Art), still many on bluefire
  • Latest GEOS FVcubed release may solve some problems.

current workaround/fix: no 4th order divergence damping with potential for noisy simulations

  • Noise can be compensated for with higher 2nd order DD
  • Upgrade to FVcubed may solve this

upgrade of the dycore to the newest NASA version, pathway for future upgrades

  • Brian now can compile FVcubed on Bluefire and Dublin (PGI)
  • Lahey still an issue (question)
  • Will has started modifying CAM-GFDL interface FV_StateMod to accommodate new release. 1-2 days of work (question)

status of baroclinic tests and built-in test suite

  • Test cases 1-2 run, with tracers 1234. Results available
  • Test case 4 seems to be running
  • Test 5 develops a wave-4 instability, run dies after 0.5 days. So far tried different divergence damping configurations, is time step unstable? Test ran fine during 2008 colloquium. Further investigations needed
  • Test cases 3, 6: problems with specification of the hybrid coefficients for the 60 and 20 levels, Will investigates

status of the ideal physics tests (Held-Suarez)

  • 400 day simulation available. Results look good.

status of the aqua-planet tests

  • Runs for 5 days, but cubed sphere artifacts appear.
  • Dry air mass adjustment runs. Some scientific questions remain.

offline interpolation of the CAM history files with interpolation package GECoRe: status and current issues

  • It is running now for both history and restart NetCDF files!
  • Assumes equi-angular grid - not the case in FVCUBED; initialization needs to be tweaked (Paul and Christtiane)
  • Document on WIKI page (Will)

initial condition netcdf files and use of the interpic_new tool

  • This all works as advertized.
  • Document on WIKI page (Will)

science issues with the dry air adjustment routine in the dycore

  • Discuss with S.J.
  • Mark Taylor has worked on this - contact

Open software engineering issues: (Will, Brian)

restart

  • Bug found in mapping
  • Now runs, but there is still a subtle bug
  • Something in fv_dynamics is not being set directly

upgrade to new version: time line and complexity

  • More information by the end of Friday, May 29.

analytic (online) initialization of the staggered edge-tangent velocities

  • After discussion with

    use of routine outfld

ESMF clock

will the namelist option INIC work? If yes, with staggered velocities?

Performance analyses (Art, Pat)

  • selection of test case for performance studies: test 2 (baroclinic wave)
  • FVcubed model configurations (resolution, number of tracers)
  • compilation and run time issues on Bluefire and Jaguar
  • comparisons to CAM FV lat-lon?

Documentation (all)

Plans for CCSM workshop (Christiane, all)

  • poster: selection of test cases and simple performance plots
  • round-table meeting at the CCSM workshop, common area, on Wednesday 4-5pm (MDT).

Plans for the next few weeks: (all, advise by HOMME team)

  • aqua-planet runs
  • analysis of aqua-planet results, standard NCL scripts?
  • coupling to land, ice and ocean, are full CCSM runs possible? Brian: grid weight files needed. Contact Mark.
  • AMIP-style runs with data ocean; Contact Mark.
  • on the wishlist: settings that allow a single-level shallow water setup
  • future maintenance
  • Next Telecon: Friday, June 12, 2009.
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