LGM, planktic foraminifera (EPILOG version)

[1] We used planktic foraminiferal assemblages in 70 sediment cores from the tropical and subtropical South Atlantic Ocean (10°N–37°S) to estimate annual mean sea surface temperatures (SSTs) and seasonality for the Last Glacial Maximum with a modified version of the Imbrie-Kipp transfer function method (IKTF) that takes into account the abundance of rare but temperature sensitive species. In contrast to CLIMAP Project Members [1981], the reconstructed SSTs indicate cooler glacial SSTs in the entire tropical/subtropical South Atlantic with strongest cooling in the upwelling region off Namibia (7–10°C) and smallest cooling (1–2°C) in the western subtropical gyre. In the western Atlantic, our data support recent temperature estimates from other proxies. […]

本研究采用了来自热带和亚热带南大西洋（10°N–37°S）的70个沉积岩心的有孔虫组合，通过改良版的伊姆布赖-基普转移函数法（IKTF），结合稀有但对温度敏感物种的丰度，对末次冰盛期的年 平均海面温度（SSTs）和季节性进行了估算。与CLIMAP项目组成员[1981]的研究相比，重建的SSTs显示整个热带/亚热带南大西洋的冰期海面温度较低，其中纳米比亚沿岸上升流区域（7–10°C）的降温最为显著，而西部亚热带环流区域（1–2°C）的降温最为轻微。在西部大西洋，我们的数据支持了其他替代指标近期得出的温度估算。