Abstract

In order to study the capabilities of a turbulent lidar, an experiment was carried out with a BSE-4 system, a meteorological measuring system, and an MTP-5 temperature profiler. The profile of the structural parameter of the refractive index \(C_{n}^{2}\) was determined with the lidar with a 15-s interval up to an altitude of 2 km. The dynamic turbulence strength was measured over rough terrain when the wind increased. Lidar operation under buoyant convection conditions allowed us to observe the rise of thermals and the formation of Cu clouds in the atmospheric boundary layer. Under the conditions of cellular convection, the lidar recorded quasi-periodic oscillations of \(C_{n}^{2}\) (Benard cells), which represented a stationary wave. Under stable temperature stratification, when the Richardson number was less than 1/4, the turbulent lidar detected a Kelvin–Helmholtz wave.

中文翻译：

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用于研究大气边界层的湍流 BSE-Lidar 的能力

摘要

为了研究湍流激光雷达的功能，使用 BSE-4 系统、气象测量系统和 MTP-5 温度廓线仪进行了实验。折射率\(C_{n}^{2}\)的结构参数的分布是用激光雷达以 15 秒的间隔确定的，高度为 2 公里。当风增加时，在崎岖地形上测量动态湍流强度。在浮力对流条件下运行的激光雷达使我们能够观察到热气流的上升和大气边界层中铜云的形成。在蜂窝对流条件下，激光雷达记录到\(C_{n}^{2}\)的准周期振荡（贝纳德细胞），代表驻波。在稳定温度分层下，当理查森数小于 1/4 时，湍流激光雷达检测到开尔文-亥姆霍兹波。