9:00 AM - 10:30 AM
[AAS01-P05] Simultaneous measurements with a Doppler Lidar, a UHF wind profiler and radiosondes: Preliminary results on vertical velocity and turbulence parameter retrievals
Keywords:Vertical velocity, Doppler Lidar, Wind profiler, Turbulence Kinetic Energy dissipation rate, Convective boundary layer
In September 2022, a WindCube v2 Infrared Doppler Lidar (EKO Co. , Japan) was deployed for about one month at Shigaraki MU Observatory. Vertical and horizontal wind measurements were obtained in the altitude range 40-300 m (AGL) with a vertical and temporal resolution of 20 m and 4 seconds, respectively. Simultaneous measurements were performed with the UHF (1.357 GHz) wind profiler WPR LQ-7 operating in routine mode from 300 m AGL with a range and time resolution of 100 m and 1 min, respectively. On some occasions, we also tested the quality of the raw data collected by the iMS-100 GPS Meisei and RS41-SGP Vaisala radiosondes under tethered balloons and drone for turbulence studies in the boundary layer near the lidar. Despite the lack of overlap between the lidar and radar altitude ranges, we checked the consistency of the vertical velocity W time series, their frequency spectra, and those of temperature acquired by the radiosondes. We also compared Turbulence Kinetic Energy (TKE) dissipation rates in Convective Boundary Layers (CBL) estimated from spectra of W time series measured by the lidar and from radar Doppler spectrum width using the empirical model described by Luce et al. (2018, 2023). These comparisons seem to confirm the relevance of the radar model, suggesting that WPR LQ-7 may also provide dissipation rates in the CBL routinely. More such studies are necessary to understand the underlying physics of the empirical model applicable in the CBL and to clarify its domain of validity. Future investigations will require a more powerful Doppler Lidar for CBL studies with the WPR LQ-7 and MU radars and we call on the holders of Doppler Lidars to join us in these studies.