AO: Areas solicited for contribution

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AO Areas solicited for contribution

• Validation using other satellite, airborne, or
  ground-based experiments providing independent
  measurements of wind profiles, clouds, and
  aerosols
• Experiments to assess accuracy, resolution, and
  stability of the ADM-Aeolus instrument ALADIN
• Assessment and validation of Aeolus retrieval and
  data processing

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US Cal-Val Effort Investigators

• Mike Hardesty, NOAA/ESRL
• Dave Bowdle, University of Alabama Huntsville
• Jason Dunion, NOAA/AOML
• Ed Eloranta, University of Wisconsin
• Dave Emmitt, Simpson Weather Associates
• Brian Etherton, University of North Carolina
  Charlotte
• Rich Ferrare NASA Langley
• Iliana Genkova, University of Wisconsin

• Bruce Gentry, NASA Goddard
• Gary Gimmestad Georgia Tech Research Instrument
• Ross Hoffman, AER, Inc.
• Chris Hostetler NASA Langley
• John Hair, NASA Langley
• Michael Kavaya, NASA Langley
• Matt McGill, NASA Goddard
• Lars Peter Riishojgaard JCSDA
• Chris Velden, University of Wisconsin
• Zhaoxia Pu, University of Utah

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Goals of the US Aeolus Cal/Val Effort

• Obtain and analyze aircraft measurements of wind
  speed, aerosol structure, aerosol backscatter,
  aerosol extinction, cloud climatologies and
  relevant parameters under the Aeolus flight track
  using remote sensors and dropsondes, Develop
  a data set extending over the life of the mission
  from surface remote sensors and in situ sensors
  (radiosondes, dropsondes, aircraft winds) by
  gathering and analyzing measurements when Aeolus
  measurement volume coincides with sensor
  observational locations, Investigate
  correlations, differences and synergisms between
  Aeolus and Atmospheric Motion Vector winds
  derived from cloud and water vapor motion
  Investigate Aeolus data quality based on data
  assimilation studies

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Current status

• Proposals were reviewed within ESA and by members
  of ADM Advisory Group
• Proposers were asked to address certain points
  and to submit revised proposals
• Our revised proposal was accepted
• Next step Locate funding

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Airborne Wind Studies

• Lower troposphere studies (Hardesty and Emmitt)
• Apply low energy, high prf systems (HRDL and
  TODWL to investigate Aeolus performance in high
  aerosol regions
• Study effects of mesoscale atmospheric
  inhomogeneities on Aeolus measurements
• Structured aerosol field
• Broken cloud fields
• Wind shear and horizontal circulations, vertical
  motions
• Full tropospheric studies (Gentry and Kavaya)
• Apply TwiLite instrument for comparisons with
  Aeolus of direct detection winds as opportunities
  present (focus on severe storms)
• Apply DAWN lidar for free tropospheric studies to
  investigate effects of clouds, wind gradients,
  etc., as opportunities present
• Potentially compare Aeolus with notional hybrid
  of DAWN and TwilLite can fly together.

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Airborne Aerosol Comparisons

• Apply LaRC Airborne High Spectral Resolution
  Lidar to validate Aerolus aerosol/cloud
  extinction and backscatter data products
  (Hostetler, Hair, Ferrare)
• Conduct flights along the Aeolus sampling curtain
  under different atmospheric conditions and
  measurement scenarios
• Compare estimates of backscatter and extinction
  directly computed by HSRL with Aerolus
  measurements

Comparisons with photometer
Measurements from Milagro campaign
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Airborne Aerosol Comparisons

• Apply NASA Cloud Physics lidar for Aeolus studies
  (McGill)
• Operate NASA CPL from a high altitude aircraft
• Provide observations of cloud and aerosol layers
  at 1064, 532, and 355 nm
• For elevated layers direct determination of
  optical depth is provided without assumptions on
  lidar ration

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Surface Wind Comparisons

• Use surface or in situ instruments (lidars, wind
  profilers, radiosondes) for long term comparison
  over the life the mission (Hardesty, Bowdle,
  Kavaya)
• Measurements taken when Aeolus measurement volume
  coincides with instrument location
• Perform comparisons when Aeolus measurements are
  within the domain of a mesoscale atmospheric
  model (Bowdle)
• Use local observations to validate the model,
  then use the model to validate the instrument
• Comparison of model, surface instruments, and
  Aeolus will address validity of applying models
  for instrument validation

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Surface Aerosol Comparisons

• Develop a data set for comparison of cloud and
  aerosol backscatter and extinction from a visible
  HSRL lidar operating in far northern latitudes,
  investigate wavelength differences in HSRL
  measurements (Eloranta)
• Apply a 355 nm backscatter lidar and a sun
  photometer to retrieve aerosol backscatter to
  extinction ratios and optical depths (Gimmestad).
  Apply a forward model to compare Aeolus and
  locally measured raw data characteristics

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Dropsonde and satellite comparisons

• Investigate Aeolus performance in the Saharan
  Aerosol Layer and in the vicinity of tropical
  cyclones through comparisons with dropsondes
  (Dunion and Etherton). Investigate capability of
  Aeolus to represent winds in the clean tropical
  environment

• Compare Aeolus global-coverage line of sight
  winds with current state of the art feature
  tracked atmospheric motion vectors (Genkova and
  Velden).
• Investigate complementarities of the two data
  sets by comparing ADM winds with the global AMV
  data
• Investigate how ADM wind profiles can be used to
  assess uncertainty in AMVs, based on assumption
  that cloud and water vapor features are ideal
  tracers

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Data Assimilation

• Joint Center will study ADM observations in the
  context of two data assimilation systems GFS and
  GEOS-5 (Riischojgaard)
• Monitor innovation statistics for level 1 and 2
  products
• Make available two different level-2 ADM wind
  data products
• Implement KNMI-developed level-2 processor to
  create its own alternative level product
• Perform data impact experiments with ADM Level 2
  LOS observations
• Three phases Preparation, data acquisition,
  extended analysis

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Next steps

• Proposals being reviewed now
• Notification sometime in spring
• First meeting of cal/val team likely in mid
  summer
• If proposal is accepted, US team will have to
  develop funding strategy to support the effort