Generalized Stability Theory Drivers

Hernan G. Arango
IMCS, Rutgers University

The Generalized stability Theory drivers can be used to study the dynamics, sensitivity and stability of the ocean circulation to naturally ocurring perturbation, errors or uncertainties in a forecast system. The propagators for optimal perturbations (singular vectors), finite time eigenmodes, adjoint finite time eigenmodes, and forcing singular vectors will be discussed in terms of the practical steps need to run these algorithms.

4D Variational Data Assimilation Drivers

The drivers for data assimilation includes both strong and weak constraint four-dimensional variational assimilation (4DVAR) algorithms. The strong constraint algorithms (conventional and incremental methods) assume that errors exits only in the observational data while the weak constraint algorithms (indirect representer method) includes both observational and model errors. These drivers will be discussed in terms of the practical steps needed to run these algorithms.