Foraminifera as a proxy for seawater neodymium: Core-top calibration and down-core application for reconstructing Holocene variability in the Indonesian Throughflow (ITF)

有孔虫作为海水钕的代表：岩心顶部校准和岩心下应用，用于重建印度尼西亚贯穿流（ITF）中的全新世变异性

• 批准号: 0851954
• 负责人: Yair Rosenthal
• 金额: $ 18.1万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-15 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0851954&HistoricalAwards=false
• 关键词: Foraminifera; proxy; seawater; neodymium; Core

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This research will assess the utility of Nd-isotopes(defined as εNd) measured in foraminifera as a water mass proxy. The first component of the work is a calibration study that takes advantage of a large set of surface sediments and overlying water samples collected on several cruises worldwide over the past few years to assess the applicability of foraminifera as recorders of deep ocean and thermocline εNd. Rare earth element patterns will be measured on the same samples to test their utility for paleoceanographic research.The new method will then be used to reconstruct Holocene variability in the relative contributions of North Pacific Intermediate Water (NPIW) and South Pacific Water (SPW) to the ITF. Seawater εNd will be measured in three vertical profiles from key locations within the ITF route and south Pacific in order to document the εNd signatures of water masses within the ITF and its end-members. The PIs will generate a low-resolution foraminiferal record of εNd throughout the Holocene in a core located in the Makassar Straits as a proxy for water mass variability, and combine it with measurements of sortable silt mean size as proxy for bottom current velocity. The work will improve understanding of Holocene changes in water mass variability and thermocline flow through the Indonesian Seas. This award supports a postdoctoral researcher.

该奖项是根据2009年的《美国回收与再投资法》（公法111-5）资助的。这项研究将评估在有孔虫中测量的ND同位素（定义为＆＃949; nd）的实用性，为水质量代理。该作品的第一个组成部分是一项校准研究，该研究利用了过去几年在全球范围内在全球多次巡游中收集的大量表面沉积物和上覆盖的水样，以评估有孔虫作为深海和热级线的记录仪的适用性＆＃949＆＃949 ; nd。将在同一样品上测量稀土元素模式，以测试其对古环学研究的效用。然后，该方法将用于重建北太平洋中间水（NPIW）和南太平洋水（SPW）对北太平洋中间水（NPI）的相对贡献的全新世变异性。 ITF。海水将在ITF路线和南太平洋的主要位置的三个垂直剖面中进行测量，以记录ITF及其最终成员内水质量的''签名。 PI将在整个全新世中产生低分辨率的有孔虫记录，该记录在整个全新世，位于Makassar海峡的核心中，作为水质量变异性的代理，并将其与可排序的零合零合零尺寸的测量合并为底部的代理。速度。这项工作将提高对水质量变异性和热跃层流经印尼海的全新世变化的理解。该奖项支持博士后研究员。