Evaluation of centennial-millennial eastern Indian Ocean climate variability & mechanisms during the Holocene: Surface & thermocline reconstructions

全新世东印度洋百年-千年气候变率及其机制的评估：表面和温跃层重建[摘要]本项目旨在通过重建印度洋偶极子（IOD）的变化，了解热带东印度洋在多年代际、百年和千年时间尺度上的气候影响和动力学。PI计划通过混合层和温跃层，从不同深度栖息地的多种浮游有孔虫中生成Mg/Ca-和d18O数据，以生成冰川、去冰川和全新世海面和温跃层温度和d18O海水的重建，这些数据先前由不来梅大学的同事从苏门答腊西部和爪哇南部的东印度洋收集的快速积累的海洋沉积物（60 cm/ky）。本研究将探讨近25000年来印度洋暖池中海温的变率和IOD的周期性，并将重点放在中世纪增温和小冰期等特定的晚全新世时期。该项目还将试图将IOD的变化与ENSO、亚洲和非洲季风以及印度尼西亚通流环流的变化联系起来。

Evaluation of centennial-millennial eastern Indian Ocean climate variability & mechanisms during the Holocene: Surface & thermocline reconstructionsDelia OppoWoods Hole Oceanographic InstitutionAbstractThis project seeks to understand the climatic influences and dynamics, on multidecadal, centennial, and millennial time scales, of the tropical Eastern Indian Ocean by reconstructing changes in the Indian Ocean Dipole (IOD). The PI proposes to generate Mg/Ca- and d18O data from multiple species of planktonic foraminifer from different depth habitats through the mixed layer and thermocline to produce glacial, deglacial, and Holocene reconstructions of sea surface and thermocline temperatures and d18Oseawater from rapidly accumulating marine sediments (60 cm/ky) that were previously collected by Univ. Bremen colleagues from the eastern Indian Ocean west of Sumatra and south of Java. The research will explore SST variability and cyclicity of the IOD in the Indian Ocean warm pool during the last 25,000 years, as well as focus on specific late Holocene time periods such as the Medieval Warming and Little Ice Age. The project will also attempt to link IOD variability with changes in ENSO, the Asian and African monsoons and circulation through the Indonesian Throughflow.