The Oregon State University (OSU) Tidal Inversion Software (OTIS) is being automated, tested and used to generate tidal solutions in the East-Asian Seas (EAS) region. This effort was undertaken to improve the tidal solutions within a relocatable version of the Navy Coastal Ocean Model (NCOM). Tests were conducted within the EAS and with a smaller domain within the EAS, the Yellow Sea, to look at the effects on OTIS of ...
Realistic dynamic systems are often strongly nonlinear, particularly those for the ocean and atmosphere. Applying variational data assimilation to these systems requires the linearization of the nonlinear dynamics about a background state for the cost function minimization, except when the gradient of the cost function can be analytically or explicitly computed. Although there is no unique choice of linearization, the tangent linearization is to be preferred if it can be ...
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