Neodymium isotopes records from western flank of Sicily channel since the last deglaciation

In this work we present a continuous record of quantitative estimations of eastern-western E-W Med water exchange since the last deglaciation, including the YD and the S1 events. Estimations are based on neodymium isotope (εNd) measurements on planktic foraminifera Fe-Mn crusts. We use a sediment core NDT-6-2016 collected during the Next Data expedition (CNR-URANIA R/V, Date/Time : 2016-06-25T05:19:44) in the transition area between the W-Sicily channel and the southern Tyrrhenian Sea (38°0'26,60'' N and 11°47'44,84''E) at 1066 m of water depth. The core depth is below the present-day interphase between WMDW and the EMSW outflowing through the Strait of Sicily, thus a suitable location to evaluate changes in the intermediate-deep water exchange between the two main Mediterranean sub-basins.

本研究构建了末次冰消期以来地中海东西向（E-W）水体交换的连续定量估算记录，涵盖新仙女木事件（Younger Dryas, YD）与S1事件。该估算基于浮游有孔虫铁锰结壳的钕同位素（εNd）测试数据。研究采用的沉积岩芯NDT-6-2016采自“Next Data”考察航次（CNR-URANIA号科考船，日期/时间：2016-06-25T05:19:44），站位位于西西里海峡西部与第勒尼安海南部的过渡区域，地理坐标为北纬38°0′26.60″、东经11°47′44.84″，采样水深1066米。该岩芯的沉积深度位于现今西地中海深层水（Western Mediterranean Deep Water, WMDW）与经西西里海峡流出的东地中海表层水（Eastern Mediterranean Surface Water, EMSW）之间的水层界面之下，因此是评估地中海两个主要次级海盆间中层-深层水体交换变化的理想站位。