AFWA Data Assimilation Efforts related to JCSDA

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

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Overview

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

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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 RD community for tech transition to
  operations

Vision Foster a community DA approach
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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

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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

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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

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AFWA DA Priorities

• Radiance Data Assimilation in WRFVAR to improve
  characterization for Warfighters
• Atmospheric Infrared Sounder (AIRS) (FY07)
• NCAR leverage JCSDA
• Improved characterization100x 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
  characterizationover land, through clouds

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AFWA DA Priorities

• European Space Agencys MetOp (FY08/09)
• NCAR
• Improved vertical moisture/temperature
  characterizationover 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

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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

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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

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Questions?