Joint Effort for Data assimilation Integration (JEDI) Tom Auligné, Director, Joint Center for Satellite Data Assimilation
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1 Joint Effort for Data assimilation Integration (JEDI) Tom Auligné, Director, Joint enter for Satellite Data Assimilation 1
2 Description of the JSDA Vision: An interagency partnership working to become a world leader in applying satellite data and research to operational goals in environmental analysis and prediction NOAA NESDIS NASA GSF U.S. Navy JSDA NOAA NWS U.S. Air Force NOAA OAR Science priorities: Radiative Transfer Modeling (RTM), new instruments, clouds and precipitation, land surface, ocean, atmospheric composition. Mission: to accelerate and improve the quantitative use of research and operational satellite data in weather, ocean, climate and environmental analysis and prediction models.
3 Myriad of concurrent DA Initiatives NWP Earth System Modeling (Ocean, Waves, ryosphere, Land, Hydrology, Aerosols, Atmospheric composition, Whole Atmosphere) Weakly/Strongly oupled Reanalyses for reforecast & climate Operational/Research, Global/Regional models Situational awareness, Nowcasting, Observation impact assessment and OSSEs Software is like entropy. It is difficult to grasp, weighs nothing, and obeys the second law of thermodynamics; i.e. it always increases. Norman Ralph Augustine
4 Joint Effort for Data assimilation Integration (JEDI) GOALS 1. Next-generation unified data assimilation system 2. Increase R2O transition rate (from academia to operations) 3. Increase science productivity and code performance STRATEGY 1. Modular code for flexibility, robustness and optimization 2. Mutualize model-agnostic components across Applications (atmosphere, ocean, strongly coupled, etc.) Models & Grids (operational/research, regional/global models) Observations (past, current and future) 3. ollective reduction of entropy
5 A D E MULTI-LEVEL OMMUNITY REPOSITORY Other DA Research Generic Oper B B A B A B A NODA ode Standards & onstraints Research (TRL 1-4) (TRL 4-7) (TRL 7-9) 1 Generic Scientific efforts in academia 2 Scientific efforts in research community Scientific efforts in satellite DA in partner Y Operational 3 JSDA s own DA Activities Scientific efforts in partner X B A E D A B D E Operations DART GSI
6 Observations Pre-processor Reading Data selection Basic Q DATA ASSIMILATION OMPONENTS for Atmosphere, Ocean, Waves, Sea-ice, Land, Aerosols, hemistry, Hydrology, Ionosphere ODBMS (observations) Model(s) Unified Forward Operator (UFO) Background [& Obs.] Error Solver Variational/EnKF Hybrid ODBMS (model equivalents) Analysis Model Initial onditions Observation Impact (OSE, OSSE) Data Fusion Reanalysis Verification Model postproc al/val, Monitoring Retrievals Simulated Obs
7 Observations Pre-processor Reading Data selection Basic Q DATA ASSIMILATION OMPONENTS for Atmosphere, Ocean, Waves, Sea-ice, Land, Aerosols, hemistry, Hydrology, Ionosphere ODBMS (observations) Model(s) Unified Forward Operator (UFO) Background [& Obs.] Error Solver Variational/EnKF Hybrid ODBMS (model equivalents) Analysis Model Initial onditions Observation Impact (OSE, OSSE) Data Fusion Reanalysis Verification Model postproc al/val, Monitoring Retrievals Simulated Obs
8 Observation Pre-Processor BUFR HDF ASII Data Decoder Thinning, blacklist, selection Basic Q Data Encoder ODBMS (all) Inspired by OPE Project (EMWF) ODBMS (reduced) Flexible architecture = series of filters an be done as soon as data is available Standardized output ODBMS (ommunity Observation Data Base Management System) Metadata for variety of sensors (past, current, future) Flexible data manipulation, yet fast Parallel distribution; archiving; data on the loud Low cost
9 Observations Pre-processor Reading Data selection Basic Q DATA ASSIMILATION OMPONENTS for Atmosphere, Ocean, Waves, Sea-ice, Land, Aerosols, hemistry, Hydrology, Ionosphere ODBMS (observations) Model(s) Unified Forward Operator (UFO) Background [& Obs.] Error Solver Variational/EnKF Hybrid ODBMS (model equivalents) Analysis Model Initial onditions Observation Impact (OSE, OSSE) Data Fusion Reanalysis Verification Model postproc al/val, Monitoring Retrievals Simulated Obs
10 Unified Forward Operator Obs. Loc. ODBMS Read ODB Obs. Type Model / Obs. Type Matching Model Options Look-up table (JSON) Atm Dycore (TBD) NEMS / ESMF ouple Land Surface (NOAH) r Atm Physics (GFS) Ocean (HYOM/MOM) Aerosols (GOART) NEMS/ESMF Wave (WW3/SWAN) Atm DA (GSI) locstreams Sea Ice (IE/SIS2/KISS) Obs. info Model Interpolate GOMs => NULL GOMs (model locations) Observer Options Model(s) Observer RTM, Bias orrection, Q, loud Detection, etc. H (x k ) [Jacobian, Revised Q, Obs. Error, Bias, ] Write ODB ODBMS
11 Observations Pre-processor Reading Data selection Basic Q DATA ASSIMILATION OMPONENTS for Atmosphere, Ocean, Waves, Sea-ice, Land, Aerosols, hemistry, Hydrology, Ionosphere ODBMS (observations) Model(s) Unified Forward Operator (UFO) Background [& Obs.] Error Solver Variational/EnKF Hybrid ODBMS (model equivalents) Analysis Model Initial onditions Observation Impact (OSE, OSSE) Data Fusion Reanalysis Verification Model postproc al/val, Monitoring Retrievals Simulated Obs
12 Solver The opposition VAR vs. EnKF is so 2005 Examples of flexible infrastructures with variety of solver options Object Oriented Prediction System (OOPS - Tremolet, EMWF) Parallel Data Assimilation Framework (PDAF - Nerger, Wegner Inst.) Fundamental distinction = how the large DA problem is divided Sequential observations Minimizer iterations Subdomains f. Mahajan s presentation
13 onclusions Do we find sufficient overlap? Research and operation Domains (Ocean, Land, Atmosphere, Air Quality, ) Utilization of DA (reanalysis, NWP, Data Fusion, OSSE, ) Do we see sufficient benefit in a unified system? Multiple options (observer, solver, ) Multiple constraints (research, generic, operational) Multiple levels of engagement an we build a sustainable collaborative structure?
14 Questions? Just as the constant increase of entropy is the basic law of the universe, so it is the basic law of life to be ever more highly structured and to struggle against entropy. Vaclav Havel 14
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