Aircraft measurements of vertical wind velocity and turbulence parameters by LRV-2 lidar during nadir sounding
A.M. Sherstobitov, V.A. Banakh, I.N. Smalikho
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: pulsed coherent Doppler lidar, LRV-2, vertical wind velocity, turbulent dissipation rate
Abstract
Wind Doppler lidars have proven themselves as an effective means of evaluating wind turbulence in aircraft measurements. However, existing methods of sounding from aboard an aircraft assume the presence of a complex scanning system. In this work, we test possibility of evaluating turbulence parameters and wind convective flows using the second version of the lidar created in the Laboratory of Wave Propagation of IAO SB RAS during nadir sounding from aboard a flying aircraft. Based on the analysis of experimental data, we retrieved vertical profiles of estimates of vertical wind velocity (VWV) dispersion and turbulent kinetic energy dissipation rate up to altitudes of 1250-1600 m. During the analysis of sounding data near clouds, we recorded VWV shear according to one lidar signal spectrum, which contained two Doppler peaks. The results of this work can be useful in creating new methods for evaluating turbulence and wind shear.
|
