Meeting Notes

Infrastructure:

• Observation Ingest:
  • Ashley: TEMPEST and COWVR added to observation ingest suite.
• Spack:
  • Ashley: Spack-stack 1.9.0 for Intel Classic, OneAPI, and GNU installed on discover-scu17 (Milan).
  • Steve H: Spack-stack 1.9.0 release branch cut last week. Rollout on HPC and AWS platforms progressing well this week. Official release anticipated in the next couple of days.
• r2d2:
  • Steve G: Overhauling r2d2 automated tests for server and client; testing r2d2 kernel functions.
  • Eric: Stress, concurrency, and scalability testing of the r2d2 production server on AWS using full-resolution Skylab runs.

SOCA:

• Memory and CPU optimizations ongoing.
• Anna: Fixed a bottleneck impacting LETKF CPU usage.
• Kriti: Working on HTLM application in SOCA; experiencing high linearization errors. Working with Christian to resolve.

ALGO:

• GEOS-JEDI: PRs open to allow building JEDI against GEOS (first step towards running GEOS with JEDI for 4DVar).
• Clean GEOS EDA experiment being developed for inclusion with JEDI release.
• Workflow changes in Skylab for CDA testing being implemented.
• OOPS changes being designed for shifting the beginning of the window.
• SVD truncation option for HTLM coefficient calculation being explored.
• BJ's CCPP model variable name PR in MPAS-JEDI under review.
• MPAS 120km 3DVar static B experiment in Skylab being fixed/updated (requires ingesting new BUMP files).
• Minor update for ProcessPerts merge in progress.

Observations (OBS):

• Surface Operator: Unified surface operator strategy being developed for various variables (T, Ps, Q) and algorithms (NOAA GSL, EMC, Met Office, etc.). Met Office created a generic operator with placeholders. GSL will transition their surface T operator development into this generic operator. Met Office will then transition surface pressure. Surface Q will be last.
• Aircraft VarBC: Pathway for development established with NOAA/EMC, NASA, and Met Office. Met Office working on ObsBias writeout (branch name in UFO issue #3473, open for testing).
• Other PRs and development ongoing (to be discussed in OBS meetings).

CRTM:

• Cloud Lookup Table: Penn State requested a new cloud lookup table with new particle habits in different size bins. This will enhance CRTM flexibility and support developing a melting-to-model transition and improving passive microwave in cold clouds.
• Aircraft Jacobian: Continuing work with STAR.

Compo:

• GEOS CF 32-member experiment ongoing; publication in progress.

Interfaces:

• welcome to the team Raji !
• Vader: Steve V working to make VADER LVCs more flexible / usable
• GPU Spectral B: Liam working on adjoints for Legendre and Fourier transforms.
• working on ectrans offload to GPU; Legendre transforms done and Fourier transforms next
• enabling UFO H(x) application to switch ObsSpace backend between current ObsGroup and new OSDF, this enables testing of OSDF for performance validation. Towards this goal, adding channel-selection to new ObsSpace OSDF backend.

EMC:

• GFS 17 Prototyping: Focused on high-resolution coupled system experiments with snow, land, and marine DA using JEDI.
• UFO: PRs enable all-sky microwave in precip regions. Starting work on European cloud detection. PR to allow compiling OOPS with static libraries (discussion point).
• FV3-JEDI: Changes to unstructured grid writer improve memory usage and speed.
• GSI Workflow Replication: Need to consider vertical interpolation and terrain. All FV3-JEDI geometries should have a concept of terrain.
• Intel Compilers: Issues with recent code versions and older Intel compilers.
• Vertical Interpolation: Post-processing planned (Dan).

GMAO:

• Spack Update:  updated to Spack 1.9; SWElL dev pinned. New SWElL changes incorporate aircraft bias correction.
• QC for Specific Humidity: Hui corrected YAMLs (working with Ben R on UFO-related things, including CO2 visibility in IR).
• 3D Pressure: Working on capability (Dan, Ro). Changes to linear operators caused ctest failures.
• Interpolation: Ricardo working with Francois.
• Spack Testing: Dorukan reports Spack working; testing cycling experiments.
• GSI-BEC: Issues noted; hoping interpolation changes will help.

Navy:

• Nancy Baker retired, she will be missed. 
• Primarily preparing for review.

Met Office:

• CI Container: Not yet working.
• Special Topic (March 13th): Multi-resolution DA and hybrid B matrix added. Getting configurations ready for JEDI observation processing.
• Parameter Validation: Now controlled by an environment variable.
• RTTOV: Plans to incorporate new version. RTTOV 14 potentially in use early next year.

MMM:

• Variable Name Change: Ongoing.
• VarBC: Investigating potential issue with covariance of the Jacobian predictor (radiance VarBC).