NOAA/WDS Paleoclimatology - Southeastern Pacific Ocean Geochemistry and Mass Accumulation Data during the Holocene

Changes in Southern Ocean biological pump efficiency are frequently invoked as a source of glacial/interglacial CO2 variability. It was recently suggested that Southern Ocean biological pump weakening also contributed to Holocene CO2 increase. Here we test the causes and downstream effects of biological pump inefficiency during the Holocene. We first provide evidence that a southward shift of the South Westerly Winds, was likely the cause of increasing upwelling in the Southern Ocean leading to local biological pump weakening as reflected in fossil-bound δ15N. We then introduce a series of ultra-high resolution (6 m/ky) productivity records from the Chilean Margin to determine the fate of Southern Ocean nutrients. A compilation of records from Pacific sites supports export and complete consumption of preformed Southern Ocean nutrients, which might have reduced the contributions of Southern Ocean marine source to the Holocene increase in atmospheric CO2.

本存档古气候学（Paleoclimatology）研究数据集可从美国国家海洋和大气管理局（NOAA）下属的国家环境信息中心（NCEI）获取，隶属于古气候学世界数据服务（WDS）。该研究对应的NCEI研究类型为古海洋学（Paleoceanography）。数据集涵盖古海洋学相关参数，研究地理位置为东太平洋（Eastern Pacific Ocean）。时间覆盖范围为距今11386至84个日历年（BP，Before Present）。如需了解参数与研究地点的详细信息，请查阅元数据（metadata）。使用本数据集时，请引用该研究。