Ecological Systems and Devices Annotation << Back PROBABILISTIC AND SPECTRAL ANALYSIS OF EXTREME INTERNAL WAVES IN THE SEA OF OKHOTSK M.V. Kokoulina, O.E. Kurkina, А.А. Kurkin, L.V. Talalushkina In this work, we presented the results of the analysis of the data on the time series of the sea water temperature and salinity distribution, as well as the speed of the total fl ow of internal waves, obtained during the expeditions of the Special Research Bureau for Automation of Marine Researches, Far Eastern Branch of Russian Academy of Sciences (SRB AMR FEB RAS), from 1983–1990. in various aquatoriesof the Sea of Okhotsk. Data for the investigations was provided by SRB AMR FEB RAS in the framework of cooperation with NNSTU n.a. R.E. Alekseeva. The measurement duration is no more than 8 days for the entire sounding period, for one region of the Sea of Okhotsk. Based on temperature and salinity time series using the TEOS-10 state equation, sea water density field was obtained, and the isopycn shift at the first baroclinic mode maximum was isolated. It is shown that the spectra of the current velocity and density of sea water are similar and straightened on the functional grid of the exponential law, and the histograms of the distribution density of the current velocity components in the region of the Frieza Strait and Cape Eustathius do not satisfy the Gaussian distribution, and therefore it can be assumed that in the presented regions flows caused by nonlinear wave processes are observed. Based on the given amplitude estimates of the expected internal waves, we can say that the maximum wave height in the mixing zone reaches 22 m and is expected over a period of 90 days. Keywords: Sea of Okhotsk; internal waves; spectral analysis; probabilistic analysis; in-situ measurements. DOI: 10.25791/esip.05.2020.1157 Pp. 42-55.