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Light Precipitation Validation Experiment

Light Precipitation Validation Experiment. LPVEx. FMI. Science Goals. Characterize the relative abilities of space-based W, Ku-, and Ka-band radars and microwave imagers and sounders to detect light. What are the detection limits of each instrument?

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Light Precipitation Validation Experiment

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  1. Light Precipitation Validation Experiment LPVEx FMI

  2. Science Goals • Characterize the relative abilities of space-based W, Ku-, and Ka-band radars and microwave imagers and sounders to detect light. • What are the detection limits of each instrument? • Can rainfall probabilities be assigned to Z and TB signatures? • Evaluate retrievals of rainfall intensity in shallow freezing level environments. • How does the ratio of cloud-rain impact PIA and PMW TBs? • How does the vertical structure of precipitation impact emission/attenuation-based algorithms? • What are the impacts of other algorithm assumptions including DSD and melting layer properties on rainrate estimates? • How do well are FOV-dependent factors such as beamfilling and multiple-scattering represented? • Determine the properties of the local environment that influence the characteristics of precipitation in this region. LPVEx 2010

  3. Ground Instrumentation • Ground Sensors • Disdrometers: 2DVD (2) and Parsivel (6-10) • 10+ rain gauges • 5 SWE probes • ADMIRARI Radiometer (total LWP) • 3 C-band Doppler radars (fully adaptable scanning geometry) • Still looking for Ka- and or X-band radar • 2 Precipitation Occurrence Sensing Systems (POSS) • UHF Wind Profiler • 3 Micro Rain Radars (MRR) • SMEAR aerosol/flux tower • 6 Ceilometers • Sounding system and expendables at Jarvenpaa (+ twice daily soundings from St. Petersburg, Tallinn, and Jokioinen) LPVEx 2010

  4. Aircraft & Research Vessel Z • Wyoming King Air • W-band cloud radar • Water content: DMT, Gerber, Nevzorov • Microphysics: 2D-P, CIP, CDP (FSSP/2D-C) • Aerosol: PCASP-100X, UWYO CCNC-100A • Ancillary: RH, T, altitude, wind speed • RV Aranda • Weather mast with disdrometers installed • Vaisala sounding system • Oceanographic measurements (conductivity, temperature, depth, Accoustic Doppler Current Profiler (ADCP), etc.) DSD/PSD RH and LWP T and z LPVEx 2010

  5. Layout • Green = FMI Wx Stn •  = Enhanced Obs. • = Vaisala WxTs (inc. rain) • Gray circles = 20 km radar range rings = Spiral = Stacked flight tracks Kerava NW Kerava NE Järvenpää Turku Maximum Extent of Flight Operations Kerava SW Kerava Emasalo Region of Likely Flight Operations  Kumpula Ferry Kumpula SE  Harmaja  Kalbadaglund Gulf Stack Kumpula SW Ferry RV Aranda Ops. Spiral S1

  6. Physical Validation Strategy Direct Evaluation • Coordinated airborne W-band radar with in situ ground-based, and ship-based μ-physics, precip., and thermodynamics. • In situ observations constrain DSD retrievals within C-band radar volumes. These 3D fields provide input to PMW and Ka/Ku-band simulators. • Cloud resolving model simulations with both GCE and RAMS provide another source of input to simulators. Measurement Observable Simulators Cloud Resolving Models & Satellite Simulators

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