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Atmospheric and Oceanic Optics

2020 year, number 8

Wind temperature probing in the atmospheric boundary layer in the coastal area of Lake Baikal. I. The Richardson number

V.A. Banakh, I.N. Smalikho, A.V. Falits
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: пограничный слой атмосферы, скорость ветра, температура, зондирование, число Ричардсона, устойчивая стратификация, atmospheric boundary layer, wind velocity, temperature, remote sensing, Richardson number, stable stratification


The results of experimental studies of the atmospheric boundary layer in the coastal zone of Lake Baikal using a coherent Doppler wind lidar and a temperature profiler are presented. Temporal-altitude distributions of the wind speed, temperature, and the Richardson number are derived. It is found that in the measurement site during all the experiment from August 6 to 23, 2018, day and night the thermal stratification was stable with formation of low-level jets. The temporal-altitude distributions of the Richardson number have layered structure. Layers with Richardson numbers higher than the critical value alternate with layers with the Richardson number lower than the critical value.