ROMS Framework and Algorithms

The typical annual overview of ROMS framework and algorithms will be presented. ROMS is still evolving and substantial structural changes have been made to allow multiple levels of nesting (composite, mosaic and refinement grids), multiple model coupling, and parallel I/O. We continue improving the 4DVar data assimilation algorithms to accelerate convergence. A new algorithm was coded to quantify the impact that each observation has on the 4DVar data assimilation system. This driver can help us to determine the type of measurements that need to be made, where to observe, and when.