Development of Infrastructure to Support the Transition of the Global Data Assimilation System (GDAS) to the Joint Effort for Data assimilation Integration (JEDI)

The transition from the Gridpoint Statistical Interpolation (GSI) software to the Joint Effort for Data assimilation Integration (JEDI) framework for producing operational analyses is underway at the National Centers for Environmental Prediction (NCEP). While the spirit of JEDI is a single, shared codebase between NCEP and other partners of the Joint Center for Satellite Data Assimilation (JCSDA), significant effort is required to integrate JEDI into each operational numerical weather prediction application. Here we present a summary of the infrastructure developed initially for the Global Data Assimilation System (GDAS) with flexible design such that many pieces can be reused in other operational systems at NCEP. Software has been developed to ingest observations from the Binary Universal Form for the Representation of meteorological data (BUFR) format directly into JEDI using the Interface for Observation Data Access (IODA). New observation-space monitoring tools leveraging the JCSDA Evaluation and Verification of the Analysis (EVA) python package have been implemented. A tool to generate configuration files for input to JEDI applications, the JEDI Configuration Builder (JCB) will be summarized. Through the GDASApp, the interface between the generic JEDI libraries and the specific implementation for the GDAS, cycling infrastructure has been developed in conjunction with NCEP’s global-workflow. In addition to a summary of these infrastructure developments, some results from our prototype cycling system will be shown.