During the second phase of the GI project, tools for small-scale interaction have been implemented. These tools are based on new and existing concepts, such as object-based modification areas, structure functions, time evolution (also known as "tweening"), the merging of different models, model field calculator, and others. These new GI techniques will enable the forecaster to efficiently modify short-range NWP model output based on data from other sources.
The ultimate goal of the complete GI project is to provide the forecaster with tools to apply both synoptic and small-scale modifications to models, which may be merged, in order to derive a final model solution. A central forecast database is being developed concurrently with this project to manage the original and forecaster-modified model data, thus ensuring a coherent and consistent dataset for the generation of forecast end products.
The GI concepts for small-scale interaction will be presented both from a functional and technical point of view. Also some operational experiences and a short demonstration showing the total GI project will be presented.