Abstract The role of the Southern Ocean in releasing CO2 (sequestered in the global ocean during the Last Glacial Maximum) into the atmosphere during deglaciation is an important topic for investigation of Earth's climate. Changes in global deep water circulation associated with upwelling of Circumpolar Deep Water (CDW) around Antarctica may have played a part in the CO2 release, but remain poorly studied. The potential response of the Pacific Ocean, including the North Pacific, to upwelling of CDW with its vast reservoir of CO2 remains unresolved. Here we combine productivity proxies, oxygen and carbon isotope values in benthic and planktic foraminifera, data on the occurrence and abundance of ice-rafted debris, and benthic foraminiferal species composition in three sediment cores with published data for three cores from the Northern Emperor Rise for the Last Glacial Maximum, deglaciation and Holocene in order to elucidate the North Pacific role in CO2 redistribution in the past. Age models of the cores are based on radiocarbon data calibrated by 14C atmospheric plateau tuning. The calcium carbonate content in all cores increased abruptly around 14.5 ka, indicating an influx of relatively young water enriched in carbonate ion, oxygen and nutrients, and sourced in the Southern Oceans. A decrease in the extent of sea ice at the NER area during early deglaciation is reflected in sharp increases in the productivity of siliceous phytoplankton near the onset of Bolling/Allerod warming, possibly facilitated by the influx of Southern Ocean-sourced nutrient-rich waters.

中文翻译：

---

自 Bølling-Allerød 变暖以来，南大洋影响远西北太平洋（北帝王海隆）的证据

摘要 在冰川消融过程中，南大洋在向大气中释放二氧化碳（在末次冰盛期期间被隔离在全球海洋中）的作用是研究地球气候的一个重要课题。与南极洲环绕极地深水 (CDW) 上升流相关的全球深水环流变化可能在 CO2 释放中发挥了作用，但仍缺乏研究。包括北太平洋在内的太平洋对 CDW 上涌及其大量 CO2 的潜在反应仍未得到解决。在这里，我们结合了生产力指标、底栖和浮游有孔虫的氧和碳同位素值、有关冰筏碎片的出现和丰度的数据，和底栖有孔虫物种组成在三个沉积岩芯中，并公布了来自北帝隆隆起末次盛冰期、冰川消退和全新世的三个岩芯的数据，以阐明过去北太平洋在二氧化碳再分布中的作用。核心的年龄模型基于通过 14C 大气高原调谐校准的放射性碳数据。所有岩心中的碳酸钙含量在 14.5 ka 左右突然增加，表明富含碳酸根离子、氧气和营养物质的相对年轻的水涌入，这些水来自南大洋。早期冰川消退期间 NER 地区海冰范围的减少反映在 Bolling/Allerod 变暖开始附近硅质浮游植物生产力的急剧增加，