Eddy dissipation rate in the atmospheric boundary layer based on radial velocity of wind lidar

Atmospheric turbulence is highly dynamic in both temporal and spatial aspects, so to detect it, equipment that can rapidly scan with high resolution within seconds is necessary. The Wind Lidar can complement the shortcomings of various remote sensing equipment and enable high-resolution rapid scanning, making it an optimal device for turbulence detection. With various scan modes, it can capture the three-dimensional spatial distribution of winds within seconds, making it particularly advantageous for detecting low-level winds within 600 meters over the urban area. Data were collected from the WIND3D6000 model by LEICE, which is installed near Incheon airport, and seven quality management techniques were applied and evaluated for their performance to enhance the quality. Subsequently, using the radial velocity derived from VAD scans, the eddy dissipation rate (EDR) was calculated based on Kolmogorov theory. The atmospheric boundary layer height was estimated using radiosonde. Typhoon cases provide a good choice for explaining the development and variation of the atmospheric boundary layer as meteorological variables such as temperature, humidity, wind direction, and speed change rapidly along their path. This study revealed that during clear days between 09:00 and 16:00, the EDR generally increased as the atmospheric boundary layer developed, and following boundary layer destruction, the EDR values also decreased accordingly. After typhoons made landfall, precipitation increased, hindering the development of the atmospheric boundary layer, with high EDR values primarily observed during precipitation periods. These results validate the potential of utilizing wind lidars for high-resolution wind and turbulence detection in the lower atmosphere, and through EDR calculations, they also indicate the ability to estimate the development of the atmospheric boundary layer.