Collaborative Research: An Ultra-High Resolution Holocene Climate Record from a Varved Sediment Sequence from the Adelie Coast, Antarctica (IODP Exp 318)

合作研究:来自南极洲阿德利海岸的 Varved 沉积物序列的超高分辨率全新世气候记录 (IODP Exp 318)

基本信息

  • 批准号:
    1129101
  • 负责人:
  • 金额:
    $ 22.14万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2011
  • 资助国家:
    美国
  • 起止时间:
    2011-09-15 至 2014-08-31
  • 项目状态:
    已结题

项目摘要

A key region for analysis of long- and short-term behavior of the East Antarctic Ice Sheet (EAIS) is the eastern sector of the Wilkes Land margin, located at the seaward termination of the largest subglacial basin in East Antarctica, the Wilkes subglacial basin. The Wilkes subglacial basin may in fact respond to climate variability in a fashion similar to the West Antarctic Ice Sheet. Additionally, a significant portion of all Antarctic Bottom Water may originate from this part of the Antarctic coast, making this region a key player in oceanic circulation patterns. The Integrated Ocean Drilling Program Expedition 318 to Wilkes Land recently obtained nearly 3,000 meters of sedimentary cores. Drill site U1357, obtained a unique ultra-high accumulation rate sedimentary sequence from the Adelie Basin that extends from the latest glacial interval through the Holocene. These seasonally laminated deposits constitute one of the world's most expanded archives of environmental change during the Holocene. The sediments contain a near annual-resolution record of when and how the ice sheet margin retreated from the shelf ~12,000 kyr B.P. They also contain a record of past changes in water temperature, water mass reservoir age, stratification, productivity, sea ice extent, and possibly bottom water production throughout the Holocene. In this collaborative proposal, the P.I.'s request funding for morphometric, stable isotopic, and geochemical analyses of foraminifera recovered from the sediment column. These will be used to produce the first high-resolution (sub-decadal to decadal) foraminiferal isotopic and chemical climate time series from the Antarctic margin.Intellectual Merit - The results from this project will provide, for the first time, the requisite data at subdecadal to decadal resolution to address a number of questions related to oceanographic and climatic changes that occurred on and around Antarctica during the Holocene, including: 1) How does the style and timing of deglaciation along the East Antarctic Margin compare with other parts of the Antarctic Margin? 2) What were the responses of the East Antarctic Margin glacial system to deglaciation as well as global and regional Holocene climate fluctuations? 3) How did oceanic circulation and bottom water production vary during the Holocene? As part of our post-expedition educational outreach, we will organize two additional interactive webcasts targeting science museums and secondary schools during the course of this research. At Stanford, we will continue to disseminate the results of this work to secondary schools via a funded NASA project wherein he is meeting regularly with science teachers from around the SF Bay Area. Additionally, we are engaging up to 8 undergraduate students at Queens College and Stanford University in the project as interns and will guide them through the process of envisioning
分析南极冰盖(EAIS)的长期和短期行为的关键区域是威尔克斯土地边缘的东部地区,位于南极洲东部最大的亚冰盆地盆地的海终止,威尔克斯亚冰川盆地。威尔克斯亚冰川盆地实际上可能会以类似于西南极冰盖的方式对气候变化做出反应。此外,所有南极底水中很大一部分可能源自南极海岸的这一部分,使该地区成为海洋循环模式的关键参与者。对威尔克斯土地的综合海洋钻井计划318最近获得了近3,000米的沉积核心。钻头U1357从阿德利盆地获得了独特的超高积累速率沉积序列,该序列从全新世的最新冰川间隔延伸。这些季节性层压的沉积物构成了全新世期间世界上最扩展的环境变化档案之一。沉积物包含近乎何时以及如何从货架上撤退的何时以及如何从B.P. 12,000 Kyr B.P.退回的年度分辨率记录。它们还包含了过去水温变化,水量储层年龄,分层,生产力,海冰范围以及可能在整个全新世的底部水生产的记录。在此协作提案中,P.I.的要求资金用于形态计量学,稳定的同位素和地球化学分析,对有孔虫的分析从沉积物柱中恢复了。这些将用于产生第一个高分辨率(亚decad到deTADAL)的有孔的同位素和化学气候时间序列,来自南极边缘。智能优点 - 该项目的结果首次将提供第一次,在相关和杂物中,围绕着一系列问题,在范围内,该项目的必要数据包括:在相关的问题上,以下问题:围绕相关的问题,以下情况下:南极边缘沿线脱气的样式和时机与南极边缘的其他部分相比如何? 2)东南极边缘冰川系统对脱气以及全球和全新世气候波动的反应是什么? 3)在全新世期间,海洋循环和底水产量如何变化?作为我们的后期教育外展活动的一部分,我们将在本研究过程中组织两个针对科学博物馆和中学的互动网络广播。在斯坦福大学,我们将继续通过一项资助的NASA项目将这项工作的结果传播给中学,他将定期与来自SF湾地区的科学老师会面。此外,我们将在皇后学院和斯坦福大学(Stanford University)进行该项目的实习生中,最多将有8位本科生参与该项目,并将指导他们完成设想的过程

项目成果

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Robert Dunbar其他文献

Antarctic Cryosphere Evolution Project (AnCEP) : New IODP proposal for transect drilling in the Southern Ocean
南极冰冻圈演化项目 (AnCEP):关于南大洋横断面钻探的新 IODP 提案
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Minoru Ikehara;Yoshifumi Nogi;Yusuke Suganuma;Robert Dunbar;Boo-Keun Khim;Tim Naish;Richard Levy;Xavier Crosta;Laura De Santis;Gerhard Kuhn;Thamban Meloth;Samuel Jaccard;Hideki Miura;Hisashi Oiwane;Kota Katsuki;Takuya Itaki;Yasuyuki Nakamu
  • 通讯作者:
    Yasuyuki Nakamu
Towards many dimensional wavepacket theory in chemical dynamics
化学动力学中的多维波包理论
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Minoru Ikehara;Yoshifumi Nogi;Yusuke Suganuma;Robert Dunbar;Boo-Keun Khim;Tim Naish;et al.;Satoshi Takahashi & Kazuo Takatsuka
  • 通讯作者:
    Satoshi Takahashi & Kazuo Takatsuka
Uranium-series dating and growth characteristics of the deep-sea scleractinian coral: <em>Enallopsammia rostrata</em> from the Equatorial Pacific
  • DOI:
    10.1016/j.gca.2010.01.017
  • 发表时间:
    2010-04-15
  • 期刊:
  • 影响因子:
  • 作者:
    Fanny Houlbrèque;Malcolm McCulloch;Brendan Roark;Tom Guilderson;Anders Meibom;Justine Kimball;Graham Mortimer;Jean-Pierre Cuif;Robert Dunbar
  • 通讯作者:
    Robert Dunbar

Robert Dunbar的其他文献

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{{ truncateString('Robert Dunbar', 18)}}的其他基金

Collaborative Research: RUI: Building a mechanistic understanding of water column chemistry alteration by kelp forests: emerging contributions of foundation species
合作研究:RUI:建立对海带森林水柱化学变化的机械理解:基础物种的新贡献
  • 批准号:
    1737096
  • 财政年份:
    2017
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay
合作研究:钴胺素和铁对特拉诺瓦湾浮游植物物种的共同限制
  • 批准号:
    1643845
  • 财政年份:
    2017
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Estimation of Antarctic Ice Melt using Stable Isotopic Analyses of Seawater
利用海水稳定同位素分析估算南极冰融化量
  • 批准号:
    1644118
  • 财政年份:
    2017
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Collaborative Research: Developing a Continuous Reconstruction of Tropical Pacific Climate Over the Last 500-700 Years: Analysis of Massive Porites Corals from American Samoa
合作研究:对过去 500-700 年热带太平洋气候进行持续重建:对美属萨摩亚大量滨珊瑚的分析
  • 批准号:
    1203999
  • 财政年份:
    2012
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Collaborative Research: TRacing the fate of Algal Carbon Export in the Ross Sea (TRACERS)
合作研究:追踪罗斯海藻碳输出的命运 (TRACERS)
  • 批准号:
    1142044
  • 财政年份:
    2012
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Holocene Climate Change in Southwestern Patagonia: New Insights from Large Lake Paleolimnology
巴塔哥尼亚西南部全新世气候变化:大湖古湖泊学的新见解
  • 批准号:
    1103550
  • 财政年份:
    2011
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Continuing Grant
Participant Support for the First Antarctic Climate Evolution Symposium
首届南极气候演变研讨会参与者支持
  • 批准号:
    0938553
  • 财政年份:
    2009
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Collaborative Research: The 10th International Symposium on Antarctic Earth Science (ISAES X)
合作研究:第十届南极地球科学国际研讨会(ISAES X)
  • 批准号:
    0639409
  • 财政年份:
    2007
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Coral Reef Primary Production and Calcification: Quantitative Analysis of Sensitivity to Environmental Forcing using a Control Volume Approach
珊瑚礁初级生产和钙化:使用控制体积方法对环境强迫的敏感性进行定量分析
  • 批准号:
    0729236
  • 财政年份:
    2007
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Standard Grant
Collaborative Research: Pacific Ocean Gyre Exchange and Ventilation Processes: Proxy Development using Deep Sea Corals
合作研究:太平洋环流交换和通风过程:利用深海珊瑚进行代理开发
  • 批准号:
    0551792
  • 财政年份:
    2006
  • 资助金额:
    $ 22.14万
  • 项目类别:
    Continuing Grant

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  • 批准号:
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