Impact of the Indonesian Throughflow on northwestern Australian biochronology during the Pliocene (IDEAL).

上新世印度尼西亚贯流对澳大利亚西北部生物年代学的影响（IDEAL）。

• 批准号: 320126557
• 负责人: Professor Dr. Jeroen Groeneveld
• 金额: --
• 依托单位: Institute of Oceanography
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/320126557?language=en
• 关键词: Impact; Indonesian; Throughflow; northwestern; Australian

International Ocean Discovery Program (IODP) Expedition 356 (August-September 2015) drilled a transect across 10° latitude of seven shelf and upper slope sites (Sites U1458-U1464) off Western Australia from the Perth Basin, through the Northern Carnarvon Basin, to the Roebuck Basin with the RV Joides Resolution. One of the main objectives was documenting the evolution of the Indonesian Throughflow (ITF) since the early Pliocene, a critical component of global thermohaline circulation and a driver of the southward-flowing Leeuwin Current. This in turn has influenced the development of aridity in Australia and the onset of the Australian monsoon. Despite the modern shallow water depth of the sites, significant subsidence during the late Miocene created an upper-bathyal setting, so that open-marine conditions prevailed during the Pliocene. This setting, which is located directly in the outflow of the ITF, allowed accumulation of a unique sequence of sediments constituting a high-resolution record of ITF changes since the early Pliocene. Previous studies from the Maritime Continent and from further offshore western Australia have shown that significant changes in the ITF occurred during the Pliocene. However, high-resolution records from directly within the outflow, which have the potential to directly link these changes to development of aridity and the monsoon across Australia, were lacking prior to Expedition 356. This project aims to improve the biostratigraphy in the eastern Indian Ocean by testing the following hypotheses that: a) Biochronology off the northwest coast of Australia remained similar to the equatorial Pacific until 3.3 Ma; b) The Pliocene development of the biogeography of shallow- and deep-dwelling planktonic foraminifera was distinct due to restriction of the Indonesian Throughflow. Creating a reliable reference record requires a well-constrained age model. It is therefore planned to create a benthic foraminiferal stable oxygen isotope record with orbital-scale resolution that will be tuned to the global benthic d18O stack (LR04). This age model will then be used to calibrate the planktonic foraminiferal biostratigraphy in the eastern Indian Ocean. Typically, Pliocene bio-datums are either from the Atlantic or the Pacific and often have differences of up to several 100 kyr between them. IODP Site U1463 was selected for this project because its position is ideally located directly within the outflow of the ITF, and meanwhile far enough offshore to be minimally impacted by terrigenous impact so that planktonic foraminifera are abundantly present.

国际海洋发现计划（IODP）第356次考察（2015年8月至9月）使用RV Joides Resolution在西澳大利亚外海的7个陆架和上斜坡地点（地点U1458-U1464）沿10°纬度钻探了一条横断面，从珀斯盆地开始，穿过北方卡纳冯盆地，到达罗巴克盆地。主要目标之一是记录自上新世早期以来印度尼西亚洋流的演变，这是全球温盐环流的一个关键组成部分，也是向南流动的列文海流的驱动力。这反过来又影响了澳大利亚干旱的发展和澳大利亚季风的爆发。尽管这些遗址的现代水深较浅，但中新世晚期的显著沉降创造了一个上半深海环境，因此上新世期间普遍存在开阔的海洋条件。这个设置，这是直接位于流出的ITF，允许积累一个独特的沉积物序列构成了高分辨率记录ITF的变化，因为上新世早期。先前对海洋大陆和澳大利亚西部近海的研究表明，ITF在上新世发生了重大变化。然而，在356远征之前，缺乏直接来自外流内部的高分辨率记录，这些记录有可能将这些变化与澳大利亚干旱和季风的发展直接联系起来。该项目旨在通过检验以下假设来改善东印度洋的生物地层学：a）澳大利亚西北海岸的生物年代学在3.3 Ma之前一直与赤道太平洋相似; B）由于印度尼西亚洋流的限制，上新世浅居和深居的浮游有孔虫的生物地理学发展是不同的。创建可靠的参考记录需要一个约束良好的年龄模型。因此，计划建立一个具有轨道尺度分辨率的底栖有孔虫稳定氧同位素记录，该记录将与全球底栖d18 O叠加（LR 04）相匹配。该年龄模型将被用来校准在东印度洋的浮游有孔虫生物地层。通常，上新世生物基准来自大西洋或太平洋，它们之间的差异往往高达数十万年。选择IODP站点U1463进行本项目是因为其位置理想地直接位于ITF流出区内，同时离岸足够远，受陆源影响最小，因此浮游有孔虫大量存在。

项目成果

The enigma of rare Quaternary oolites in the Indian and Pacific Oceans: A result of global oceanographic physicochemical conditions or a sampling bias?

• DOI: 10.1016/j.quascirev.2018.09.028
• 发表时间: 2018-11-15
• 期刊: QUATERNARY SCIENCE REVIEWS
• 影响因子: 4
• 作者: Gallagher, S. J.;Reuning, L.;Bogus, K.
• 通讯作者: Bogus, K.

The amplifying effect of Indonesian Throughflow heat transport on Late Pliocene Southern Hemisphere climate cooling

• DOI: 10.1016/j.epsl.2018.07.035
• 发表时间: 2018-10-15
• 期刊: EARTH AND PLANETARY SCIENCE LETTERS
• 影响因子: 5.3
• 作者: De Vleeschouwer, David;Auer, Gerald;Paelike, Heiko
• 通讯作者: Paelike, Heiko

Dynamic Antarctic ice sheet during the early to mid-Miocene

• DOI: 10.1073/pnas.1516130113
• 发表时间: 2016-03-29
• 期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• 影响因子: 11.1
• 作者: Gasson, Edward;DeConto, Robert M.;Levy, Richard H.
• 通讯作者: Levy, Richard H.