A finite-difference GCM dynamical core with a variable-resolution stretched grid

In other words, the longer-term integrations suffer from an inaccurate interaction at the boundaries of the area of interest. [...]a nested-grid approach does not allow one to perform continuous long-term integrations without updating initial and boundary conditions. [...]the fine-resolution fields may provide only a marginal to moderate impact on the coarse-resolution fields within a buffer zone around the area of interest.