A Generalized Physics Interface for Operational NWP Models

Several different numerical weather prediction (NWP) models in use at the National Centers for Environmental Prediction Environmental Modeling Center (NCEP/EMC) use similar physics packages each with some differences in the interfaces, code structure, and underlying computations. As part of a multi-agency Physical Interoperability (PI) group, a part of the National Unified Operational Prediction Capability (NUOPC) program, we have developed a prototype driver enabling different models in the National Environmental Modeling System (NEMS) to use a common physics interface. In this presentation, we will describe the current progress of this work, discuss some of the design and technical issues encountered, and highlight some of the recommendations from different stakeholders in order to improve the overall design, implementation, and eventual transition into operations.