Working Paper Article Version 1 This version is not peer-reviewed

Sodar Observation of the ABL Structure and Waves over the Black Sea Offshore Site

Version 1 : Received: 20 October 2019 / Approved: 22 October 2019 / Online: 22 October 2019 (11:26:12 CEST)

How to cite: Lyulyukin, V.S.; Kallistratova, M.; Zaitseva, D.; Kuznetsov, D.; Artamonov, A.; Repina, I.; Petenko, I.; Kouznetsov, R.; Pashkin, A. Sodar Observation of the ABL Structure and Waves over the Black Sea Offshore Site. Preprints 2019, 2019100258 Lyulyukin, V.S.; Kallistratova, M.; Zaitseva, D.; Kuznetsov, D.; Artamonov, A.; Repina, I.; Petenko, I.; Kouznetsov, R.; Pashkin, A. Sodar Observation of the ABL Structure and Waves over the Black Sea Offshore Site. Preprints 2019, 2019100258

Abstract

The three-axes Doppler sodar Latan-3 operated on an oceanographic stationary platform in the coastal zone of the Black Sea in June 2015. The platform is located 450 meters offshore from the southern coast of the Crimea Peninsula in the region of Katsiveli (44.39°N, 33.99°E). The water depth at the site is about 30 meters. The atmospheric boundary layer (ABL) typical for the mediterranean seas was observed when the wind is from the sea. The physical processes typical for the coastal mountain terrain was observed when the wind was from the shore. Complex measurements of the ABL parameters were performed using a sodar. Auxiliary measurements of the ABL parameters were performed using a temperature profiler and an ultrasonic thermometer-anemometer. Observations were made mostly during a fair weather with a pronounced diurnal course of meteorological parameters. Sodar data analysis revealed a strong wave activity in the ABL. Internal gravity waves with amplitudes of up to one hundred meters were regularly observed in a layered turbulence structure under stable conditions. Various forms of Kelvin-Helmholtz billows were observed at the interface between the sea breeze and the return flow aloft and in the low level jets.

Subject Areas

breeze; sodar; atmospheric boundary layer; internal gravity waves; Kelvin-Helmholtz billows

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