"Arctic Ocean Paleoceanography (ArcOP)": Pilot research and lead of IODP Expedition 377(ArcOP-Pilot)

“北冰洋古海洋学（ArcOP）”：IODP 377号探险队的试点研究和领导（ArcOP-Pilot）

• 批准号: 447617953
• 负责人: Professor Dr. Rüdiger Stein
• 金额: --
• 依托单位: Zentrum für Marine Umweltwissenschaften (MARUM)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/447617953?language=en
• 关键词: Arctic; Ocean; Paleoceanography; ArcOP; Pilot

In the New Proposal, it has been outlined in detail that the Arctic Ocean was/is a key player in the past, present and future global climate/earth system, however, the marine geoscience research in the Arctic lags behind other world oceans, especially from a paleoclimatic perspective. Concerning the reconstruction of the long-term climate history, a breakthrough in Arctic Ocean paleoclimate research was the first scientific drilling in the permanently ice-covered central Arctic Ocean that was carried out during IODP Exp 302 (ACEX) in 2004. The ACEX results were unprecedented and give important insight into the long-term Arctic climate and sea-ice history on its pathway from Greenhouse to Icehouse conditions. However, major questions related to the climate history of the Arctic Ocean during early Cenozoic times remain unanswered, partly due to the major mid-Cenozoic hiatus (or strongly reduced sedimentation rates) and partly to the poor recovery of the ACEX record. Following-up ACEX and its cutting-edge science, a second scientific drilling on Lomonosov Ridge with a focus on the reconstruction of the continuous and complete Cenozoic Arctic Ocean climate history, has been proposed and is now re-scheduled as IODP Exp 377 (“Arctic Ocean Paleoceanography - ArcOP”) for August-September 2022. In this context, the main focus within this DFG project will be (1) to carry out a pilot study on Polarstern sediment cores recovered at or close to the locations of potential IODP 377 drill sites during Exp PS115/2 in 2018, (2) to contribute to the final planning and implementation as well as the lead of IODP Exp 377 (as one of the co-chief scientists), and (3) to document and present first results of the pilot study as well as the IODP expedition during post-cruise meetings and in reports/publications. The pilot study is of major relevance for IODP Exp 377 as already described in the New Proposal:- By combining the Polarstern cores composed of the uppermost undisturbed about 10 m of late Quaternary sediments, and the IODP drill holes in which the uppermost meters are often not well preserved due to drilling disturbances near the water-sediment interface, a unique complete and undisturbed composite sedimentary section representing the early Cenozoic to Recent, will be obtained.- For correlating the Polarstern cores and IODP sites in detail, MSCL-Logging and XRF scanning data (to be determined on selected Polarstern cores following the IODP rules), will be used.- An age model of the Polarstern cores will be developed based on detailed litho-, cyclo-, paleomagneto-, and 230Th-isotope-stratigraphy to be later incorporated into the age model of the IODP Exp 377 sedimentary sequence.- For reconstructing the Quaternary Arctic climate history, a multiproxy approach will be carried out on the Polarstern cores, including the determination of specific biomarkers, mineral assemblages, coarse-fraction composition, grain-size distributions and XRF scanning data.

在新提案中，它详细概述了北极海是过去，现在和未来的全球攀登/地球系统，但是，北极的海洋地球科学研究落后于其他世界海洋，尤其是从古气候的角度来看。关于重建长期气候历史的重建，北极海洋古气候研究的突破是2004年在IODP EXP 302（ACEX）期间进行的永久性冰覆盖的北极海洋中的第一个科学钻探。ACEX在ACEX上进行的ACEX结果是前所未有的，并为整个冰上的环境提供了重要的洞察力。然而，与新生代初期的北极海洋气候历史有关的重大问题仍然没有得到答复，部分原因是主要的中元中断（或强烈降低的沉积率），部分是由于ACEX记录的恢复不佳。随后的ACEX及其尖端科学是对Lomonosov Ridge进行的第二次科学钻探，重点是重建连续而完整的新生代北极海洋气候历史，现在已重新安排为IODP EXP 377（IODP Exp 377） （1）在2018年EXP PS115/2期间在潜在的IODP 377钻头恢复或接近潜在的IODP 377钻机位置进行的肺沉积物核心进行试点研究，（2）为最终的计划和实施以及IODP EXP 377的领导以及在iodp Exp 377的领导中（作为探险科学家中的一项），以及（3）在（3）中进行了iod研究，以及IOD的第一名，以及IOD的第一名，以及IOD的第一名，以及IOD的第一名。会议和报告/出版物。试点研究与IODP EXP 377的主要相关性与新提案中已经描述： - 通过将大约10 m晚期的季季沉积物不受干扰的最上层的极端核心组合在一起，而IODP钻孔以及iPlost钻孔通常无法很好地保存在该钻孔中，因为该钻探通常在底部的底部序列序列，并且在底部的底部序列，并且是独特的序列，是一个独特的序列，这是一个独特的水疗法，这是一个独特的插座，这是一个独特的隔离界，这是一个序列的，这是一个独特的。 - 将获得详细的详细信息，MSCL-Logging和XRF扫描数据（遵循IODP规则遵循选定的极端核心确定）。 230Th-isotope-stratigraphy to be later incorporated into the age model of the IODP Exp 377 sedimentary sequence.- For reconstructing the Quaternary Arctic climbate history, a multiproxy approach will be carried out on the Polarstern cores, including the determination of specific biomarkers, mineral assemblages, coarse-fraction composition, grain-size distributions and XRF scanning data.