Opened 15 years ago
Closed 15 years ago
#258 closed upgrade (Done)
W4DPSAS revisited
| Reported by: | arango | Owned by: | arango |
|---|---|---|---|
| Priority: | major | Milestone: | Adjoint Based Algorithms |
| Component: | Adjoint | Version: | 3.2 |
| Keywords: | Cc: |
Description (last modified by )
The W4DPSAS weak-constraint data assimilation algorithm was redesigned to follow closely Courtier's (1997) dual formulation paper. This upgrade includes:
- Added spectral and Ritz preconditioning to W4DPSAS similar to that coded for W4DVAR.
- Added hot start for subsequent outer loop in W4DPSAS and W4DVAR. This can be activated by turning new input parameter LhotStart in s4dvar.in.
- Added all the variables necessary for the observation sensitivity driver in output NetCDF MODname. We are currently working on this new driver which is the adjoint of the W4DPSAS and W4DVAR system.
- Removed obsolete routine impulse.F.
Now both weak-constraint data assimilation driver are working very nicely. Many thanks to Andy Moore for his help coding and testing these algorithms.
Change History (1)
comment:1 by , 15 years ago
| Description: | modified (diff) |
|---|---|
| Resolution: | → Done |
| Status: | new → closed |
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