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Yuying Zhang, Jay Mace (University of Utah), Ping Yang (Texas A&M University)

A suite of radar-lidar-radiometer cirrus retrieval algorithms for the combined cloudsat, calipso, and aqua datastreams; development and initial results. Yuying Zhang, Jay Mace (University of Utah), Ping Yang (Texas A&M University). Data provided by: Gerry Heymsfield, Matt McGill, Andy Heymsfield.

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Yuying Zhang, Jay Mace (University of Utah), Ping Yang (Texas A&M University)

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  1. A suite of radar-lidar-radiometer cirrus retrieval algorithms for the combined cloudsat, calipso, and aqua datastreams; development and initial results Yuying Zhang, Jay Mace (University of Utah), Ping Yang(Texas A&M University) Data provided by: Gerry Heymsfield, Matt McGill, AndyHeymsfield

  2. The A-Train ?/05 ?/07 12/02 3/05 1/04 Slide Courtesy Graeme Stephens Cloud observations in the near future

  3. II. Retrieval algorithms X X X X X X X X X

  4. II. Retrieval algorithms 2. Forward model Qabs fitted Yang et al. 2003 empirical relation

  5. II. Retrieval algorithms 3. Optimal estimation framework (Rodgers, 1976; Rodgers, 2002)

  6. III. Sensitivity

  7. III. Sensitivity

  8. III. Sensitivity

  9. IV. Case Study CRYSTAL-FACE July 26 2002

  10. Courtesy G.Heymsfield Courtesy G.Heymsfield& M. McGill Courtesy G.Heymsfield& S. Platnick

  11. Avalone et al. Weinstock et al. 2002

  12. MOD06 Cloud Products compare with lidar-Radiometer retrievals MOD06 (King et al. 1997) retrieval Optical thickness

  13. IV. Summary • A major advantage of the A-Train: use multiple data streams for cloud property retrieval Goal: develop an algorithm suite to exploit this resource • From IWC comparison with WB57, the lidar-radiometer algorithm is able to retrieve reliable microphysical properties • Retrieval algorithms are sensitive to empirical constants • In future, use radar and lidar profiles to retrieve vertical structure of cirrus clouds

  14. Aqua MODIS  Passive radiometer scattered and emitted radiance  Integral constraint  Algorithm development Radiance  emissivity CO2 channel (Wylie and Menzel, 1989; Wylie et al., 1994; Liou, 2002)

  15. CloudSat Radar  Millimeter radar  Vertical profile of Ze

  16. CALIPSO • Optical lidar • Vertical profile of attenuated backscatter Lidar signal  cloud layer transmissivity (Mitrescu and Stephens, 2002; Young 1995) Height (km) Lidar signal

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