Abstract The Younger Dryas event is one of the most abrupt climate changes observed in Northern Hemisphere paleoclimatic records. The possible driver, despite being proposed by a number of authors, is still under vigorous debate with no scientific consensus. Most studies investigated the AMOC, with its shutdown being responsible for a reduction of heat and salt in the North Atlantic. However, by reanalyzing and comparing the paleoclimatic records from the northern and southern sites of the Brazilian cape, we consider a significant decrease of the North Brazil Current to be the main cause for the heat and salt transport to high latitudes through coupled effects of the Brazilian promontory and a southward shift of the Equatorial Currents in the equatorial Atlantic. We obtained the δ18O, δ13C, TOC, CaCO3 records at the northern and southern sites from the PANGAEA database. The results demonstrate a pronounced antiphased variation of the paleoclimatic records between the northern and southern sites during the YD, thus suggesting a significant southward migration of the Equatorial Currents.

中文翻译：

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新仙女木期间赤道大西洋海洋环境的快速重组

摘要 新仙女木事件是北半球古气候记录中观测到的最突然的气候变化之一。尽管有许多作者提出了可能的驱动因素，但仍在激烈辩论中，没有科学共识。大多数研究调查了 AMOC，其关闭是减少北大西洋热量和盐分的原因。然而，通过重新分析和比较巴西海角北部和南部地区的古气候记录，我们认为巴西北部海流的显着减少是通过巴西海角的耦合作用将热量和盐分输送到高纬度地区的主要原因。海角和赤道大西洋赤道洋流向南移动。我们得到了 δ18O、δ13C、TOC、PANGEA 数据库中北部和南部站点的 CaCO3 记录。结果表明，YD 期间南北站点之间的古气候记录存在明显的反相变化，从而表明赤道洋流向南迁移。