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Hydrometeor Characteristics from S-Pol Radar: DYNAMO Workshop Breakout Session

Explore findings on hydrometeor behavior: persistent ice, wet snow peaks, graupel presence, and limited range near melting level in MCS. Study wet aggregates and graupel using CFADs, Z, ZDR, and LDR data. Plan next steps for model comparison and radar simulator.

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Hydrometeor Characteristics from S-Pol Radar: DYNAMO Workshop Breakout Session

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  1. Hydrometeor characteristics from S-Pol Angela Rowe Radar Breakout Session DYNAMO Workshop, Kona, Hawaii 5 March 2013

  2. CFADs Z (dBZ) Z (dBZ) Convection Stratiform Oct Nov Dec Nov Dec Oct

  3. Hydrometeor Characteristics • Persistent ice • Wet snow peaks during active periods • Presence of graupel • Limited to within a few km of melting level all MCS

  4. 11/23/2011 Z V PID

  5. 11/23/2011 Z V 50 dBZ! ZDR PID

  6. Suzuki et al. (2008) Straka et al. (2000): wet aggregates (Z <45, ZDR 0.5-3, LDR -10 to -20) Z ~30-40dBZ ZDR ~0.5dB Z ~42dBZ ZDR ~1dB Straka et al. (2000): graupel (Z 20-50, ZDR -0.5-2, LDR <-20) PID: Wet snow LDR~-25dB PID: Graupel LDR~-21dB PID: Wet snow

  7. Next steps • Continue improvement of PID • Comparison with aircraft data • Useful format for model comparison • Radar simulator? • Characteristics as transitions from shallow to deep to stratiform E-mail: akrowe@atmos.uw.edu Funded by NSF Grant # AGS-1059611 and DOE Grant # DE-SC0008452 MJO Field Data and Science Workshop, March 2013, Hawaii

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