Data Assimilation - UFS R2O
Team Leads:
|
Dan Holdaway |
Sergey Frolov |
The Data Assimilation sub-project aims to enhance the initialization of all Unified Forecast System (UFS) applications by transitioning to the Joint Effort for Data assimilation Integration (JEDI) system. JEDI leverages modern software engineering practices to support model-native grid data assimilation, built upon shared code and flexible algorithms.
Over the coming years, JEDI will be integrated into multiple UFS applications. It will first be used to initialize the ocean, sea ice, and snow components in the upcoming version 17 upgrade of the Global Forecast System (GFS). With this upgrade, GFS will become a more fully coupled system, and JEDI will initialize all its newly integrated components. In version 18, JEDI is planned to expand further to initialize the atmosphere and land surface (soil temperature and moisture). Simultaneously, the ensemble data assimilation system will also transition to JEDI, starting with the marine components.
JEDI will also play a key role in initializing the new Global Chemistry and Aerosol Forecast System (GCAFS). GCAFS will introduce the first operational Global Constituent Data Assimilation System (GCDAS) at NCEP, producing aerosol species analyses four times daily using JEDI. In parallel, work is progressing to apply JEDI to high-resolution global ocean analysis within the Global Real-Time Ocean Forecast System (RTOFS), building on efforts from the GFSv17 development.
In the near future, NOAA will operationally implement version 1 of the Rapid Refresh Forecast System (RRFS). Version 2 will feature two major advancements: a switch to the MPAS dynamical core and the replacement of the GSI system with JEDI for atmospheric initialization.
The Hurricane Analysis and Forecast System (HAFS) currently uses GSI for atmospheric initialization and RTOFS for ocean initialization. HAFS version 3 will adopt JEDI for atmospheric initialization, and ongoing investigations are exploring JEDI-based ocean initialization to support more comprehensive coupled data assimilation.
The broader research and development community continues to advance JEDI through the Joint Center for Satellite Data Assimilation (JCSDA). Innovative approaches such as strongly coupled data assimilation and continuously cycling assimilation are actively being explored and tested.
Over the coming years, JEDI will be integrated into multiple UFS applications. It will first be used to initialize the ocean, sea ice, and snow components in the upcoming version 17 upgrade of the Global Forecast System (GFS). With this upgrade, GFS will become a more fully coupled system, and JEDI will initialize all its newly integrated components. In version 18, JEDI is planned to expand further to initialize the atmosphere and land surface (soil temperature and moisture). Simultaneously, the ensemble data assimilation system will also transition to JEDI, starting with the marine components.
JEDI will also play a key role in initializing the new Global Chemistry and Aerosol Forecast System (GCAFS). GCAFS will introduce the first operational Global Constituent Data Assimilation System (GCDAS) at NCEP, producing aerosol species analyses four times daily using JEDI. In parallel, work is progressing to apply JEDI to high-resolution global ocean analysis within the Global Real-Time Ocean Forecast System (RTOFS), building on efforts from the GFSv17 development.
In the near future, NOAA will operationally implement version 1 of the Rapid Refresh Forecast System (RRFS). Version 2 will feature two major advancements: a switch to the MPAS dynamical core and the replacement of the GSI system with JEDI for atmospheric initialization.
The Hurricane Analysis and Forecast System (HAFS) currently uses GSI for atmospheric initialization and RTOFS for ocean initialization. HAFS version 3 will adopt JEDI for atmospheric initialization, and ongoing investigations are exploring JEDI-based ocean initialization to support more comprehensive coupled data assimilation.
The broader research and development community continues to advance JEDI through the Joint Center for Satellite Data Assimilation (JCSDA). Innovative approaches such as strongly coupled data assimilation and continuously cycling assimilation are actively being explored and tested.
Agile development and transition of the next generation data assimilation infrastructure (JEDI) for all the components of the UFS (Atm, Ocean, Sea Ice, Land) targeting GFS v17 and v18, GEFS v13, GODAS, and the SFS v1 thereafter. Development of reanalysis capabilities and initial conditions for reforecast. Preparation of state-of-the-art data assimilation components for next generation of operational systems.