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

百年至千年东印度洋气候变化评估

• 批准号: 0726829
• 负责人: Delia Oppo
• 金额: $ 39.32万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2011-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0726829&HistoricalAwards=false
• 关键词: Evaluation; centennial; millennial; eastern; Indian

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.

全新世期间东印度洋气候变化和机制的评估：表面和温跃层重建迪利亚奥波伍兹洞海洋研究所摘要这个项目试图通过重建印度洋偶极子(IOD)的变化来了解热带东印度洋在几十年、百年和千年时间尺度上的气候影响和动态。PI建议通过混合层和温跃层生成来自不同深度生境的多种浮游有孔虫的镁/钙和d18O数据，以生成冰川、去冰期和全新世的海面和温跃层温度以及d18O的数据，这些数据是由联合国大学海洋研究所以前收集的快速积累的海洋沉积物(60厘米/年)中的海水。来自东印度洋、苏门答腊岛以西和爪哇南部的不来梅同事。这项研究将探索过去25,000年来印度洋暖池海温变化和IOD的周期性，并将重点放在特定的晚全新世时期，如中世纪变暖和小冰期。该项目还将尝试将IOD的可变性与ENSO、亚洲和非洲季风以及通过印度尼西亚Throughflow环流的变化联系起来。