Millennial scale variations of terrigenous provenance in marine realm are closely related to regional environment and climate changes. Therefore, a wealth of information of past environment and climate can be constrained via fingerprinting sediment provenance. The Sea of Japan is a unique marginal sea in the North Pacific due to its high sill and distinct thermohaline circulation. The modern hydrography in the Sea of Japan is mainly affected by the East Asian Monsoon and Tsushima Warm Current, one branch of the Kuroshio Current. The Sea of Japan communicates with neighboring seas through four shallow and narrow straits, indicating great effects of global eustatic sea level change on its environment over glacial-interglacial cycles. Here we examine the terrigenous provenance in fine-grained fraction (<63 μm) of core KCES1, located near one end of the Tsushima Strait of the Sea of Japan over the last 48 ka, using radiogenic isotopes of strontium (Sr) and neodymium (Nd). Our data suggest that the terrigenous provenance in core KCES1 was mainly derived from the Yangtze River after 7 ka and a mixture of Yangtze and Yellow Rivers during the last glacial and deglacial periods. Notably, pronounced negative excursions of εNd values at HS1 were attributed to minor additions of unradiogenic Nd contribution from China-Korea cratonic hinterland. A binary mixing model further reveals that >85% terrigenous material is derived from the Yangtze and Yellow Rivers over the last 48 ka. Moreover, abrupt variations in sediment provenance occurred at ~18 ka and ~ 7 ka, which coincide with variations in oceanic surface circulation and deep ventilation recorded in the Sea of Japan. We suggest that paleo-Tsushima Warm Current invaded into the Sea of Japan with reopening of the Tsushima Strait at HS1 and the Tsushima Warm Current substantially entered the Sea of Japan after 7 ka due to intensified Kuroshio Current and rising eustatic sea level. The inflow of Tsushima Warm Current gives rise to a range of changes in surface hydrography, deep ventilation, ecological communities and productivity and sediment texture. The combination of fluxes of paleo-rivers and the intensity of Kuroshio Current, which are closely tied to the eustatic sea level and the East Asian Monsoon, plays a key role in controlling the variations in sediment provenance in the Ulleung Basin. Our study provides unique insight into the tight coupling between changes in sediment provenance and oceanic environment over the last 48 ka in the Sea of Japan.

海洋领域陆源出世的千年尺度变化与区域环境和气候变化密切相关。因此，通过指纹沉积物来源可以限制过去的环境和气候的大量信息。日本海由于其高高的基石和独特的热盐环流而成为北太平洋独特的边缘海。日本海的现代水文学主要受东亚季风和对流暖流（对流黑潮的一个分支）的影响。日本海通过四个浅海和狭窄海峡与邻近海域相通，这表明在冰冰间期循环中，全球向海平面的欢乐变化对其环境产生了巨大影响。在这里，我们检查了核心KCES1的细粒级分（<63μm）中的陆源，位于日本海对马海峡的最后一个近48 ka处，利用锶和钕的放射性同位素。我们的数据表明，核心KCES1中的陆源起源主要来自7ka之后的长江，以及最后一个冰川和冰消时期的长江和黄河的混合体。值得注意的是，HS1的εNd值出现明显的负偏移是由于中韩克拉通腹地增加了少量非放射性Nd贡献。二元混合模型进一步揭示，在过去的48 ka内，长江和黄河的陆源物质> 85％。此外，沉积物源的突然变化发生在〜18 ka和〜7 ka，这与日本海中记录的海洋表面环流和深层通风的变化一致。我们建议，随着对虾海峡在HS1的重新开放，古-对马暖流侵入日本海，而由于黑潮加剧和海平面上升，对马暖流在7 ka后基本上进入了日本海。对马暖流的流入引起地表水文学，深层通风，生态群落以及生产力和沉积物质地的一系列变化。古河通量与黑潮水流的强度密切相关，与欣喜的海平面和东亚季风密切相关，在控制Ulleung盆地沉积物来源的变化中起着关键作用。我们的研究提供了关于日本海最后48 ka沉积物来源变化与海洋环境之间紧密联系的独特见解。