Opened 9 years ago

Closed 9 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:


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.

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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