Multi-proxy analyses of sediment core GeoB13801-2@en

Over the Uruguayan shelf and uppermost slope the coalescence of northward flowing Subantarctic Shelf Water and southward flowing Subtropical Shelf Water forms a distinct thermohaline front termed the Subtropical Shelf Front (STSF). Running in a SW direction diagonally across the shelf from the coastal waters at 32°S towards the shelf break at ca. 36°S, the STSF represents the shelf-ward extension of the Brazil-Malvinas Confluence zone. This study reconstructs latitudinal STSF shifts during the Holocene based on benthic foraminifera d18O and d13C, total organic carbon, carbonate contents, Ti/Ca, and grain-size distribution from a high-accumulation sedimentary record located at an uppermost continental-slope terrace. […]在乌拉圭陆架及上陆坡区域，向北流动的亚南极陆架水（Subantarctic Shelf Water）与向南流动的亚热带陆架水（Subtropical Shelf Water）交汇融合，形成特征鲜明的温盐锋面，命名为亚热带陆架锋（Subtropical Shelf Front，STSF）。该锋面以西南走向斜穿陆架，从南纬32°的近岸水域延伸至约南纬36°的陆架坡折处，是巴西-马尔维纳斯汇流区向陆架方向的延伸体。本研究基于采自一处上陆坡台地的高沉积速率沉积记录中的底栖有孔虫δ¹⁸O、δ¹³C、总有机碳、碳酸盐含量、钛钙比及粒度分布数据，重建了全新世时期亚热带陆架锋的纬度位移变化。[…]