Opened 15 years ago
Closed 15 years ago
#382 closed upgrade (Done)
Observation Impact, OBS_IMPACT_SPLIT
| Reported by: | arango | Owned by: | arango |
|---|---|---|---|
| Priority: | major | Milestone: | Adjoint Based Algorithms |
| Component: | Adjoint | Version: | 3.3 |
| Keywords: | Cc: |
Description
The observation impact operator for W4DPSAS and W4DVAR was further developed to additionally compute the contributions due to initial conditions, surface forcing, and boundary conditions. A new C-preprocessing option, OBS_IMPACT_SPLIT, is introduced to achieve this. It requires additional integrations of the tangent linear model. This option needs to be used at the same time with OBS_IMPACT and W4DPSAS_SENSITIVITY or W4DVAR_SENSITIVITY.
If OBS_IMPACT_SPLIT is defined as well, then the contribution to the observation sensitivities for the increments in the initial conditions, surface forcing, and boundary conditions are all computed separately. This is a very nice feature and is very revealing.
Many thanks to Andy Moore for coding and testing this new option.
