Based on the high-resolution Mg/Ca and oxygen isotope ratio (δ¹⁸O) of planktonic foraminifera Globigerinoides ruber, sea surface temperature (SST) and salinity (SSS) were reconstructed in Core PC-1 from the northern Okinawa Trough during the last 24 kyr. From the last glacial maximum to Holocene, SST varied from 20.2°C to 24.6°C. Millennial-scale climatic events of the SST during the last glacial, such as the Heinrich events, Bølling-Allerød warming, and Younger Dryas, have been identified, which are synchronous with the climate changes in the North Atlantic, suggesting a teleconnection between the northwestern Pacific and the North Atlantic. During the last 24 kyr, the SSS variation can be divided into three parts: (1) during 21–15.5 ka, there was a significantly low SSS; (2) during 15.5–11.7 ka, the SSS increased obviously; (3) since 11.7 ka, the SSS is relatively stable. In order to discuss the main factors influencing the SSS in the northern Okinawa Trough, the relative abundance of Pulleniatina obliquiloculata and the oxygen isotope difference between the northern and middle Okinawa Trough (Δδ¹⁸O_sw) have been used to indicate the intensity of the Kuroshio Current and Changjiang freshwater discharge, respectively. The Δδ¹⁸O_sw result shows that there is a large amount of Changjiang freshwater emptied into the northern Okinawa Trough during 18–15.5 ka, which is caused by the subtropical monsoon rain band lingering in the lower reaches of the Changjiang River drainage, supporting the Jet Transition Hypothesis. As the Kuroshio Current strengthened since 15.5 ka as indicated by the increased relative abundance of P. obliquiloculata, the variation of Kuroshio Current became the more important contribution to the SSS in the study region. The results of our study indicate that the key factor influencing the SSS in the northern Okinawa Trough is variable during the last 24 kyr.

基于浮游有孔虫Globigerinoides ruber的高分辨率Mg/Ca和氧同位素比值（δ ¹⁸ O）在过去的 24 kyr 期间，在冲绳海槽北部的 Core PC-1 中重建了海面温度 (SST) 和盐度 (SSS)。从末次冰期到全新世，海温从 20.2°C 变化到 24.6°C。已经确定了末次冰期海温事件的千禧年尺度气候事件，如海因里希事件、Bølling-Allerød 变暖和 Younger Dryas，它们与北大西洋的气候变化同步，表明西北地区之间存在遥相关。太平洋和北大西洋。在过去的 24 kyr 期间，SSS 变化可以分为三个部分：（1）在 21-15.5 ka 期间，SSS 显着降低；(2) 15.5～11.7 ka，SSS明显增加；(3) 自 11.7 ka 以来，SSS 相对稳定。为探讨影响冲绳海槽北部 SSS 的主要因素，斜纹白粉虱和冲绳海槽北部和中部的氧同位素差异(Δδ ¹⁸ O _sw )分别用于指示黑潮和长江淡水排放的强度。Δδ ¹⁸ O _sw结果表明，^18~ 15.5 ka 期间有大量长江淡水排入冲绳海槽北部，这是由于长江流域下游的亚热带季风雨带挥之不去，支持了喷射过渡假说。由于P 的相对丰度增加表明自 15.5 ka 以来黑潮电流增强。斜花，黑潮海流的变化成为研究区SSS的更重要贡献。我们的研究结果表明，在过去的 24 kyr 期间，影响冲绳海槽北部 SSS 的关键因素是可变的。