Abstract
The results of lidar study of wind turbulence, low level jet streams, and internal atmospheric waves in the stable boundary layer of atmosphere on the coast of Lake Baikal are presented. Few events of the atmospheric internal waves (AIWs) were registered during the experimental campaign. All the registered AIWs were observed in the presence of low level jet streams. Two dimensional time–height patterns of the wind turbulence dissipation rate during AIW events were obtained as well.
Highlights
Wind turbulence, low level jet streams, and atmospheric internal waves (AIWs) were studied on the coast of the Lake Baikal in summer campaigns of 2015 and 2016 with the use of a Stream Line lidar (Halo Photonics)
The analysis of the lidar data processing results shows several AIW events occurred in the presence of jet streams
To assess the turbulence energy dissipation rate ε, we used the method of transverse structure function of the radial velocity measured by the lidar during conical scanning [5]
Summary
Low level jet streams, and atmospheric internal waves (AIWs) were studied on the coast of the Lake Baikal in summer campaigns of 2015 and 2016 with the use of a Stream Line lidar (Halo Photonics). The lidar was mounted 340 m away from the coast of the lake, on the territory of the Baikal Astrophysical Observatory of Institute of Solar-Terrestrial Physics, Siberian Branch, Russian Academy of Sciences (51°50'47.17"N, 104°53'31.21"E); the lidar altitude above the lake level was 180 m. The analysis of the lidar data processing results shows several AIW events occurred in the presence of jet streams. Two jet streams were observed simultaneously during some AIW events. Using the initial data of these measurements (arrays of radial velocities and signalto-noise ratios (SNR)) we retrieved the time– height patterns of the turbulence kinetic energy dissipation rate and calculated the relative error of assessment of the dissipation rate from the lidar data
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