Ecological Systems and Devices Annotation << Back Particle Transport by Internal Waves across the Continental Slope: The Effect of Hydrological Factors and Tidal Forcing in Numerical Modeling Kuznetsov P.D., Rouvinskaya E.A., Kurkina O.E., Kurkin A.A. This paper examines the impact of reduced bottom bathymetry, background density, and barotropic forcing on the estimates of neutral buoyancy particle displacements along the continental slope using fully nonlinear nonhydrostatic modeling. It is shown that in areas where the primary transformation of the baroclinic tide occurs due to steep continental slopes, models with a simplified model bottom that preserves the slope angle provide acceptable estimates of transport distances. Replacing the multicomponent tide with a semidiurnal tide, while maintaining the energy of tidal oscillations, also does not significantly alter the estimates of vertical and horizontal displacements. Although the instantaneous velocity fi elds will differ in the two cases, the overall dynamics of internal waves will be similar, ultimately allowing for close estimates of particle transport distances. In regions where the main transformation of long waves occurs on local bottom irregularities, simplification of the bathymetry leads to a significant change in the dynamic regimes, resulting in estimates of horizontal and vertical transport distances that differ by orders of magnitude. A change in background density does not critically affect the obtained results unless it leads to a change in wave regimes. Keywords: Lagrangian trajectories, transport distances, neutrally buoyant particles, internal waves, baroclinic flows, clustering, level exceedance probability. DOI: 10.25791/esip.12.2025.1562 Pp. 23-36.