Agenda

Review status of action items for mid-term review Tues 09/29

Attending

Tom, Thomas N., Don, Xin, Beau, Hongli, Walls

Minutes

Round table of work related to WRF+ in the past 2 weeks.

Walls

• Working on WRF ADJ code optimization: a careful analysis of the code showed two potential areas of improvement:

• Memory "I/O": 80% of the variables are stored without being used. Potential for 20% speed-up
• Improve cash usage by breaking large "do loops". Estimated improvement in performance of 10%

• estimated time for the work: 1 or 2 months

Beau

• Namelist entry to disable solver in WRF+
• Namelist entry stop_on_error to force fatal stop on tladj-related error
• Working on documentation of Namelist entries. Many namelist entries seem not to be used. Discussed strategy: clean the obvious unnecessary Namelist entries (e.g. physics options that are not implemented in WRF+) and document as much as possible
• Working on expanding TL and ADJ tests in test_solve_em: from one time step to multiple time steps

Xin

• J_LBC: report is finished
• clean-up for 3DVar and 4DVar (e.g. adjoint variables disabled in 3DVar)
• minimize I/O between Var&NL and also Var&Plus
• Penn State student uses Real.exe routines to balance "ndown" and "nup" + other bugfixes for multi-incremental 4DVar

Don

• Working on user document about single executable
• Working on task related to ESMF report
• will start at RAL on Oct 5

ThomasN

• working on testing MPAS TL/ADJ generated with OpenAD
• next step: will contact Argonne (OpenAD) team to provide feedback and figure their strategy to solve problems encountered