combining todwl with smart towed platform for unique investigation of the marine atmospheric...
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Combining TODWL with Smart Towed Platform for unique investigation of the marine
atmospheric boundary layer
G. D. Emmitt and C. O'Handley, Simpson Weather Associates
H. Jonsson (NPS/CIRPAS) and D. Khelif (UCI)Lidar Working Group Meeting
SnowmassJuly 17 – 20 2007
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Objectives
• Use a flux measuring platform suspended from aircraft to obtain second level of observations to study energy budgets within the Marine Boundary Layer.
• Use a Doppler Wind Lidar to obtain winds and aerosol distributions between the observation levels (aircraft flight level and towed platform level)
• Use DWL data to position platform and select aircraft headings for optimal intercepts of MBL features of interest
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Background
• Smart Towed Platform funded as SBIR project for CIRPAS. PI’s were Carl Friehe and Djamal Kehlif of University of California Irvine.
• TODWL developed with joint funding from ONR and NPOESS
• First co-flights conducted in April 2007– 30 hours flight time all over water
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Specific Targets
• TODWL/STP targets included:– OLEs– MBL jets– Coastal transitions– Multilayer situations
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TODWLscanner
STV
Particleprobes
SurfaceTemperatureSensor
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STV attached to Twin Otter
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Smart Towed Platform
Temperature Relative HumidityWinds (gust)GPSProximity radarCruise missile flight control
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Smart Towed Vehicle
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Smart Towed Vehicle
Converted Cruise Missile
With flux sensors
Courtesy of Carl Friehe
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Plans
• Complete analyses of ’07 data– Very interesting conditions near shore– First time ever having fluxes near (~ 10 – 30
m) ocean surface with wind structure context provided by DWL
• More flights are planned for Spring ’08
• Possible flights at night over water