Abstract: Incremental four-dimensional variational data assimilation is a method that solves the assimilation problem by minimizing a sequence of approximate ?inner-loop? functions. In any implementation of such a scheme a decision ...

Abstract: Incremental four-dimensional variational data assimilation is the method of choice in many operational atmosphere and ocean data assimilation systems. It allows the four-dimensional variational data assimilation (4DVAR) ...