Opened 9 years ago
Closed 9 years ago
#373 closed upgrade (Done)
Level of no motion in 4DVar Balance Operator
Reported by: | arango | Owned by: | arango |
---|---|---|---|
Priority: | major | Milestone: | Adjoint Based Algorithms |
Component: | Adjoint | Version: | 3.3 |
Keywords: | Cc: |
Description
The error covariance balance operator was updated to include the options for what state variable to use as a constraints (in the off-diagonal terms), and a level of no motion option when computing the balanced free-surface contribution.
Notice that the following new parameters were added to input script External/s4dvar.in:
! Balance operator level of no motion depth (m) used when computing balanced ! free-surface contribution, [1:Ngrids]. LNM_depth == 1000.0d0 ! meters, positive ! Balance operator level of no motion flag used to compute balanced ! free-surface contribution: ! ! [0] Integrate from local bottom to the surface ! [1] Integrate from LNM_depth to surface or integrate from local bottom ! if shallower than LNM_depth ! LNM_flag = 0 ! Balance operator logical switches for state variables to consider in the ! error covariance multivariate constraints. balance(isSalt) = T ! salinity balance(isFsur) = T ! free-sruface balance(isVbar) = F ! 2D momentum (ubar, vbar) balance(isVvel) = T ! 3D momentum (u, v)
I also cleaned few things:
- Removed the internal flag SET_ZETA. This is now the default configuration in all adjoint-based algorithm. This option was introduced a while ago during the perfect restart. The assignment of the free-surface to is its fast-time averaged value is now done by calling set_zeta in main3d and not in rhs3d. This change was supported in the adjoint-based algorithms by activating this flag. This is fully tested and we get identical solutions.
- Removed obsolete routine load_forcing from frc_adjust.F. This is not longer necessary.
- Added a new global attribute state_vector to output NetCDF file containing the variables and their order in the 4DVar state vector.
Change History (1)
comment:1 Changed 9 years ago by arango
- Resolution set to Done
- Status changed from new to closed
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