Ecological Systems and Devices Annotation << Back Numerical Modeling and Analysis of Spatiotemporal Features of the Field of Internal Waves in Avacha Bay Shcherbakova V.S., Rouvinskaya E.A., Kurkina O.E. Regional features of the internal wave fi eld in the Avacha Bay of the Pacifi c Ocean are investigated in the framework of the fully nonlinear non-hydrostatic numerical modeling using data from the WOA18 climate atlas for the summer season, bathymetry from GEBCO and tidal forcing from the TPXO 8 model based on satellite altimetry data. The simulation took into account the rotation of the Earth. It is shown that baroclinic fi elds have a complex multimode structure: wave beams are observed. Amplitudes of the diurnal and semi-diurnal baroclinic tide along the selected section were determined and plotted. Heights and periods of waves extracted from the isopycnal displacements at a depth of 50 m are well described by the lognormal law; wavelengths have a Weibull distribution. In 5 % of cases, waves with heights of 10–15 m are recorded; waves with heights of 1–4 m have the greatest frequency, which is in good agreement with fi eld observation data. Keywords: baroclinic tide amplitudes, fully nonlinear model, Euler equations, probabilistic characteristics of internal waves. DOI: 10.25791/esip.9.2024.1474 Pp. 44-56.