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Mesoscale Breakout Session

Summary of the June 2009 NSF Facility User’s Workshop mesoscale breakout session with key topics, recommendations, and discussions on enhancing weather observations. Topics include hurricanes, complex terrain phenomena, winter weather, and multi-year field campaigns considerations.

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Mesoscale Breakout Session

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  1. Mesoscale Breakout Session NSF Facility User’s Workshop June 2009 ~30 participants Good spectrum of students, NCAR, university, and NSF representation No consensus recommendations, just good discussion

  2. Some (but not all) interesting mesoscale phenomena that need more observations • Hurricanes • Flux measurements in extreme conditions (>50 m/s) • Sea spray measurements • Enhanced Observations • Towed drone (not in DP) • Rapid-fire (km scale)dropsondes (enhancement to DP)

  3. Complex Terrain • Orographic precipitation, moist processes, wave dynamics • Enhanced Observations • “More” mobile and polarimetricradars (enhancement to DP) • Remote sensing of wind (enhancement to DP) and thermodynamics (new to DP) from aircraft • Particle size distribution via polarimetric radar (available, but challenging) and disdrometers (new to DP)

  4. Other topics of interest • Winter weather • Latent heating in tropical cyclogenesis • Improved microphysics, surface & boundary layer parameterizations in mesoscale modeling • Issues in mesoscale data integration, assimilation, and analyses

  5. Multi-year field campaigns • Do we need longer-term mesoscale observations (i.e. multiple year field campaigns)? • Advantages: • Increased sample size • Increased probability of detection • Disadvantages: • Resource commitments • NSF Mission of basic research vs. long-term monitoring

  6. Observational Wish-list • High density up & down soundings (potential trade-off in # of obs vs. platform & expendable cost/accuracy) • Multiple dual-polarimetric, phased-array, mobile radars • UAVs • Surveillance radar on DP aircraft • Dropsonde system on King Air (A10?) • Scanning water vapor DIAL (3D moisture) • 3D temperature?

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