Holocene and Last Glacial Maximum thermocline reconstructions in the Indo-Pacific Warm Pool

印度太平洋暖池全新世和末次冰期最大温跃层重建

• 批准号: 42165109
• 负责人: Professor Dr. Wolfgang Kuhnt
• 金额: --
• 依托单位: Arbeitsgruppe Marine Mikropaläontologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/42165109?language=en
• 关键词: Holocene; Last; Glacial; Maximum; thermocline

We propose to reconstruct the Holocene and Last Glacial Maximum (LGM) thermocline profiles of the Indo-Pacific Warm Pool (IPWP) region and to investigate relations with the El Niño-Southern Oscillation (ENSO) and Australian-Asian monsoon systems. Planktonic foraminiferal stable isotope and Mg/Ca analyses of surface and thermocline dwelling planktonic foraminifers as well as assemblage counts in 25 cores from ODP, R/V „Sonne“ and R/V „Marion Dufresne“ cruises will provide a comprehensive regional coverage of the IPWP that will allow three-dimensional thermocline reconstructions for three critical timeslices (Recent, early Holocene precession maximum, and LGM). Our main objectives are 1) to estimate LGM and early Holocene temperatures and salinities of sea surface and thermocline waters in the IPWP region and to compute regional maps of temperature differences between the LGM, the early Holocene and the late Holocene; 2) to improve regional temperature calibrations and reconstructions of thermocline depths in the IPWP region for the late and early Holocene and LGM and 3) to relate the vertical profiles of the upper water column within the IPWP to circulation changes (intensity and structure of the Indonesian Throughflow), state of ENSO and Australian-Asian monsoonal wind and precipitation patterns.

我们建议重建印度-太平洋暖池(IPWP)地区的全新世和末次冰期极大(LGM)温跃层剖面，并研究其与厄尔尼诺-南方涛动(ENSO)和澳大利亚-亚洲季风系统的关系。对浮游有孔虫的表层和温跃层进行的浮游有孔虫稳定同位素和镁/钙分析，以及来自ODP、R/V“Sonne”和R/V“Marion Duresne”邮轮的25个岩心的组合计数，将提供对IPWP的全面区域覆盖，从而能够对三个关键时间片(最近、早期全新世进动最大值和LGM)进行三维温跃层重建。我们的主要目标是1)估计IPWP区域海面和温跃层水域的温度和盐度，计算LGM、早期全新世和晚全新世之间的区域温差图；2)改进IPWP区域全新世晚期和早期以及LGM区域温跃层深度的区域校准和重建；3)将IPWP区域上层水柱的垂直剖面与环流变化(印度尼西亚横流的强度和结构)、ENSO状况以及澳大利亚-亚洲季风风和降雨型联系起来。