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AFWA Data Assimilation Efforts related to JCSDA

AFWA Data Assimilation Efforts related to JCSDA. Maj Lee Byerle HQ AFWA/A8T 2 May 07. Overview. Background Motivation Current Data Assimilation Approach Recent Collaboration AFWA DA Priorities Follow-on Actions. Background.

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AFWA Data Assimilation Efforts related to JCSDA

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  1. AFWA Data Assimilation Efforts related to JCSDA Maj Lee Byerle HQ AFWA/A8T 2 May 07

  2. Overview • Background • Motivation • Current Data Assimilation Approach • Recent Collaboration • AFWA DA Priorities • Follow-on Actions

  3. Background • To address COPC AI 2006.2.9, “AFWA will assess the direction of data assimilation (DA) development at NCAR as it relates to development at JCSDA and take steps to converge the efforts.” • To advocate community partnerships that leverage the entire R&D community for tech transition to operations Vision: Foster a community DA approach

  4. Motivation Establish data assimilation (DA) program which: • Delivers optimum required capability to the warfighter addressing specific deficiencies • Land/Sfc Interactions • Clouds • Dust Transport • Promotes national unity of effort between operational modeling centers

  5. AFWADA Course of Action Continue community DA approach through AFWA investment in NCAR • Maximize leverage through increased NCAR and JCSDA collaboration and integration work • Enables AFWA to: • Execute 5-year DA plan: NPOESS prep, next-gen DA • Work closely with NCEP/JCSDA to add radiance data sets to existing systems • Work with NASA to add ESMF-compliant land-surface model

  6. Recent Collaboration • NCAR and JCSDA scientists collaborated on WRFVAR (Dec 06); incorporated JCSDA-derived: • Community Radiative Transfer Model • AMSU-A/B bias-correction algorithms • Radiance data thinning algorithms • NCAR connecting DTC with JCSDA efforts • Evaluating hybrid DA techniques (Dr. Barker) • Collaborating with NCEP & NASA on land surface modeling (LSM) DA issues • Plan to merge radiance assimilation into LSM for WRF

  7. AFWA DA Priorities • Radiance Data Assimilation in WRFVAR to improve characterization for Warfighters • Atmospheric Infrared Sounder (AIRS) (FY07) • NCAR leverage JCSDA • Improved characterization—100x increase in vertical resolution • Special Sensor Microwave Imager/Sounder (SSMIS) (FY07/08) • NCAR leverage JCSDA • Fills voids, characterizes ocean surfaces better • Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) (FY08) • NCAR leverage JCSDA • Improved vertical moisture/temperature characterization—over land, through clouds

  8. AFWA DA Priorities • European Space Agency’s MetOp (FY08/09) • NCAR • Improved vertical moisture/temperature characterization—over land, through clouds • Advanced Technology Microwave Sounder (ATMS) (FY09/10) • NCAR collaborate with JCSDA • Characterization of cloud optical properties to improve cloud model forecasts • Cross-track Infrared Sounder (CrIS) (FY10/11) • NCAR collaborate with JCSDA • Characterization of cloud optical properties to improve cloud model forecasts • Visible/Infrared Imager/Radiometer Suite (VIIRS) (FY11/12) • NCAR collaborate with JCSDA • Characterization of cloud optical properties to improve cloud model forecasts

  9. AFWA DA Priorities • Hybrid Ensemble Transform Kalman Filter/ 3-D Variational (EtKF/3DVar) DA Technique • Improved initial conditions • Cheaper (fewer CPUs) than 4D-VAR • Investigate cloudy radiance assimilation w/NPOESS data • Improved CFLOS/representation of clouds in models

  10. Follow-on Actions • AFWA Statements of Work will require NCAR to exploit/reuse JCSDA research/completed DA techniques when possible • Improve two-way communication between JCSDA and AFWA • Codify AFW representation at JCSDA • Request JCSDA increase scope to COAMPS and WRF modeling systems

  11. Questions?

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