Various sediment properties, such as mean grain size, total organic carbon, total nitrogen, C/N ratio, CaCO₃, and biogenic opal content, were analyzed for a box core (BC02; 45 cm long) and a gravity core (GC02; 628 cm long), which were collected from the western margin of the Hupo Trough located off the eastern coast of Korea. The study area has been affected by the East Korea Warm Current (EKWC), a branch of the Tsushima Warm Current (TWC). The analytical results obtained for BC02 and the upper part of GC02 were in agreement, affirming the core-top preservation of GC02. Based on the corrected calibrated AMS ¹⁴C dates, the sedimentation rate of GC02 changed abruptly at ~8.2 ka from ~4.0–10.2 cm/kyr in the lower part to ~56.6–91.0 cm/kyr in the middle to upper part. This corresponds to the lithologic change from sandy mud to mud sediments showing the mean grain size change from 6.9 to 46.0 μm. Diverse paleoceanographic proxies representing the surface water condition exhibited varying degree of change at ~8.2 ka, after which all the properties remain almost unchanged, implying stable and continuous depositional conditions following the complete development of the EKWC. Furthermore, it indicated that the sediment depositional conditions in the Hupo Trough in response to the EKWC might have stabilized at ~8.2 ka since the opening of the Korea Strait during the Holocene sea level rise. Moreover, microfossil data from previous studies on the establishment of the TWC in the East Sea (Japan Sea) support our interpretation that the sediment properties revealed the Holocene development of the EKWC in the Hupo Trough.

对于箱形岩心（BC02； 45厘米长）和重力岩心（GC02；生物质），分析了各种沉积物的性质，例如平均粒径，总有机碳，总氮，碳氮比，CaCO ₃和生物蛋白石含量。 628厘米长）是从位于韩国东部沿海的Hupo槽西缘采集的。研究区域受到对马暖流（TWC）分支东朝鲜暖流（EKWC）的影响。BC02与GC02上部的分析结果相吻合，肯定了GC02的核心-顶部保存性。基于校正后的AMS ¹⁴至今，GC02的沉积速率在〜8.2 ka处突然从下部的〜4.0–10.2 cm / kyr改变为中部至上部的〜56.6–91.0 cm / kyr。这对应于从砂质泥浆到泥浆沉积物的岩性变化，显示出平均粒径从6.9μm到46.0μm。代表地表水状况的各种古海洋学代理在〜8.2 ka处表现出不同程度的变化，此后所有特性几乎保持不变，这意味着随着EKWC的完全开发，沉积条件变得稳定和连续。此外，这表明自全新世海平面上升以来，自海峡开放以来，响应EKWC的Hupo海槽中的沉积物沉积条件可能已稳定在〜8.2 ka。而且，