Comparison of winds, waves, and turbulence as observed by airborne lidar, ground-based radars, and instrumented tower

摘要: On June 29, 1981, two ground-based Doppler radars, an airborne lidar, a tall (444 m) instrumented tower, and rawinsonde collected wind data in the planetary boundary layer (PBL) central Oklahoma. This allowed, for first time, intercomparison of fields synthesized from lidar with those dual radar data. The vertical profile PBL measured by radars compared favorably profiles tower while one obtained differed other three as much 3 m/s speed 38° direction. time dependence differences estimates suggested that these discrepancies could be attributed to Schuler resonance aircraft's inertial navigation system which caused erroneous component aircraft velocity vector subtracted radial velocities, thus creating errors horizontal fluctuations detected different sensing systems well. Also, spectra well both magnitude shape, suggesting similar structure PBL. A peak at 4-km wavelength, evident all systems, is proposed horizontally symmetrical cells having wavelength 4 times height accord theory.