Core Insights - The research conducted by the Polar Research Center's team provides a new perspective on the tidal dynamics in the Kara Sea region, challenging traditional understandings and enhancing the comprehension of Arctic tidal mixing mechanisms [1] Group 1: Research Findings - The Barents Sea-Kara Sea area is a sensitive core region for Arctic sea ice changes and plays a crucial role in influencing climate variations in East Asia and the Northern Hemisphere [1] - The Kara Strait is identified as a key hub for sea ice transport and energy transfer, significantly impacting the Arctic Northeast Passage [1] - The study reveals that the continental slope near Vaigach Island is another important source of internal tides, with energy intensity surpassing that of the central strait [2] Group 2: Ocean Dynamics - Background currents confine internal tides to approximately 10 kilometers offshore from the Vaigach Island slope, creating a unique coastal trapped wave [2] - These coastal trapped waves exhibit a high modal structure, accompanied by strong vertical shear and energy dissipation, which are critical for the mixing processes and water mass transformation in the Arctic marginal seas [2] - The research successfully separates internal tides from topographic waves using Lagrangian filtering methods, revealing that energy dissipation caused by topographic waves is comparable to that caused by internal tides, correcting previous underestimations of topographic wave contributions [2]