b.e30_alpha08o.B1850C_MTso.ne30_t232_wgx3.343

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Quiet
Tech stack
fortran
Domain
hpc

Research direction

Start by comparing experiment 343 with experiment 341, then inspect the SourceMods/src.cam/air_composition.F90 file and the user_nl_cam configuration described in the issue. The work is complete when the 343 case includes that SourceMods change and EFIX is added to fincl1, with the resulting diagnostics available for comparison.

Written by the indexing model from the issue text.

Description

Purpose:
To support new dynamical cores that use discrete total energy definitions different from CAM physics, we configured the total energy fixer to enforce energy consistent with the dynamical core. This required scaling the physics tendencies in the physics-dynamics coupling layer — and there was a convoluted bug in that scaling!

There are two experiments:

  • 343 = "the hammer" - changed dycore to use physics energy (no leaks associated with energy definition)
  • 344 = bugfix in CAM7 approach to energy

This is 343


Description:

Same as 341 except:

  • add SourceMods
/glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha08o.B1850C_MTso.ne30_t232_wgx3.343/SourceMods/src.cam/
air_composition.F90  
  • user_nl_cam

add 'EFIX' to fincl1


Case directory:


Sandbox:


Diagnostics:


Output:

  • Raw output on derecho (if still available): /glade/derecho/scratch/hannay/archive/b.e30_alpha08o.B1850C_MTso.ne30_t232_wgx3.343/
  • CAM Climos: /glade/campaign/cgd/amp/amwg/climo/b.e30_alpha08o.B1850C_MTso.ne30_t232_wgx3.343

Contacts:
@cecilehannay @dlawrenncar @adamrher @PeterHjortLauritzen @JulioTBacmeister @swrneale @slevis-lmwg @wwieder @olyson @gustavo-marques @iangrooms @fobryan3 @klindsay28 @dabail10 @duvivier @tilmes @mbramberger @gunterl


Extra details:

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Stars
11
Forks
3
PR merge metrics
No merged PRs in 30d

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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