During winter, strong winds and waves significantly enhance sediment resuspension in the Yellow River Delta. Based on the continuous and high-resolution data on water levels, wave heights, current velocities, and echo intensities collected by the Acoustic Doppler Current Profiler at different depths (5 m and 12 m) in the northern Yellow River Delta simultaneously, this study investigated the sediment resuspension during gale events and tranquil conditions. In deeper waters (12 m), the suspended sediment volume concentration (SSVC) showed a strong correlation with current speed (r = 0.74), while in shallower waters (5 m), the SSVC correlated more closely with wave height (r = 0.72). The thorough analysis of gale events revealed that the maximum wave heights during northwest gales were 23.80% and 34.59% lower than that during northeast gales at deep and shallow stations, respectively, primarily due to the longer wind fetch associated with northeast gales. Conversely, the maximum current velocities during northwest gales were 10.34% and 37.31% higher than that during northeast gales at deep and shallow stations. In deeper waters, the maximum wave–current induced shear stress $({\tau }_{cw}$) and SSVC during northwest gales were 30.38% and 3.70% higher than those during northeast gales, highlighting current-driven resuspension. In contrast, in shallower waters, the maximum ${\tau }_{cw}$ and SSVC during northeast gales were 47.35% and 4.94% higher than those during northwest gales, underscoring the dominance of wave-induced resuspension.

Quaternary climate has been characterized by pronounced glacial–interglacial cycles, with eustatic sea-level fluctuations directly controlling coastal sedimentary environments. The Yellow River Delta, situated on the southwestern coast of Bohai Bay, bears a distinct stratigraphic imprint of marine–terrestrial environmental transitions. However, critical knowledge gaps persist in reconstructing an integrated continental–marine stratigraphic framework. This study focuses on the nearshore core CB2302, integrating sediment lithology, grain size, foraminiferal assemblages, and geochemical proxies to establish a regional stratigraphic chronology since MIS5. Three depositional units (DU1–DU3) and 12 sedimentary subunits (C1–C12) were identified based on grain-size distributions, geochemical signatures, hydrodynamic, and microfossil assemblages. Integration of AMS ¹⁴C dating and sequence stratigraphic analysis establishes a post-MIS 5 stratigraphic framework for the northern Yellow River Delta, revealing sedimentary responses to three transgressive–regressive cycles (MIS 5e, 5c, and 5a) and confirming widespread terrestrial deposition during MIS 4–2, with no detectable marine influence in MIS 3 strata. Furthermore, correlation with representative cores across the Yellow–Bohai Sea coastal system elucidates a unified model of shoreline migration patterns driven by post-MIS5 sea-level oscillations. These findings advance the understanding of Quaternary sediment–landscape interactions in deltaic systems and provide critical stratigraphic benchmarks for petroleum exploration and coastal engineering in active depositional basins.

The Bohai Sea, located at the edge of western Pacific, is one of the most vulnerable regions under climate change. Using the high‐precision MIKE three‐dimensional hydrodynamic numerical model, this study conducted comparative experiments to investigate the impacts of atmospheric pressure, wind, specific volume, and evaporation precipitation and runoff on the seasonal variations of the sea surface height (SSH) in the Bohai Sea. The findings reveal that the average annual SSH in the Bohai Sea is lower in the northeast and higher in the southwest, higher in summer and lower in winter. Moreover, the seasonal SSH variation decreases from north to south, with variations exceeding 0.4 m in the northern Liaodong Bay but only 0.2 m in the southern Laizhou Bay. Atmospheric pressure emerges as a significant factor, contributing 72.7%, 73.9%, 71.0%, and 92.0% to the seasonal SSH changes in Liaodong Bay, Laizhou Bay, Bohai Bay, and the Bohai Strait, respectively, and causing seasonal SSH difference of approximately 0.22 m in most areas. Specific volume changes contribute 6.1%, 21.7%, 19.3%, and 4.0% to the seasonal SSH variations in the respective regions. Wind direction impacts result in lower SSH in the northern Bohai Sea during winter and higher SSH in summer, while the southern part exhibits the opposite trend. This study evaluates the contribution of each factor to seasonal SSH changes, and provides reference for other areas, which improves the accuracy of engineering design and non‐period water level forecasts, and evaluates potential climate changes affecting marine environments.