Collaborative Research: (GRGC) High Resolution Glacial Geologic and Palynologic Records of the Last Deglaciation in the Tropical Andes

合作研究:(GRGC)热带安第斯山脉末次冰消期的高分辨率冰川地质和孢粉学记录

基本信息

  • 批准号:
    9422423
  • 负责人:
  • 金额:
    $ 5.27万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1995
  • 资助国家:
    美国
  • 起止时间:
    1995-06-01 至 1998-05-31
  • 项目状态:
    已结题

项目摘要

9422423 Young The primary objective of the proposed project is to obtain continuous, high-resolution, AMS 14C datable proxy records of glaciation and vegetation change from lacustrine sediment cores that span the last deglaciation and Holocene from four regions in the tropical Andes where evidence for abrupt climatic reversals during the last glacial-to-interglacial transition have already been documented. The PIs seek to improve not only the chronology of late-glacial climatic oscillations in the tropical Andes but also to improve the basis for interpreting the sedimentologic and palynologic records. Specifically, the PIs propose: i) to couple glacial geology and glacial-lacustrine sedimentology to provide estimates for the timing , rate, and magnitude of changes in glacier equilibrium -line altitudes during the last deglaciation, ii) to couple modern vegetation studies with palynological analyses of sediment cores from the western Amazon Basin to estimate the timing of and paleoclimatic factors responsible for the abrupt changes in vegetation that marked the last glacial-to-interglacial transition in this region, iii) to collaborate with Ecuadorian geologists to date and characterize geochemically conspicuous tephra units that were deposited during the last deglaciation so that these important isochrons may be used to correlate precisely among proxy records of paleoclimate preserved in sediment and ice cores from different sites in the tropical Andes, and iv) to provide closer age constraints for specific moraines, which, based on both preliminary and published radiocarbon ages, were deposited at about the same time as the YD and H1 Events.
9422423 Young 拟议项目的主要目标是从热带安第斯山脉四个地区跨越最后一次冰消期和全新世的湖泊沉积岩芯中获取连续、高分辨率、AMS 14C 可数据化的冰川作用和植被变化代理记录,这些地区已经记录了末次冰期到间冰期过渡期间气候突变的证据。 PI不仅致力于改善热带安第斯山脉晚冰期气候振荡的年代学,而且还改善解释沉积学和孢粉学记录的基础。 具体而言,PI建议:i)将冰川地质学和冰川湖沉积学结合起来,以估计末次冰消期冰川平衡线高度变化的时间、速率和幅度,ii)将现代植被研究与亚马逊盆地西部沉积物岩芯的孢粉学分析结合起来,以估计导致植被突然变化的时间和古气候因素 标志着该地区最后一次冰期到间冰期的转变,iii) 与厄瓜多尔地质学家合作,对上次冰消期期间沉积的地球化学上显着的碎石单元进行测定和表征,以便这些重要的等时线可用于精确关联热带安第斯山脉不同地点沉积物和冰芯中保存的古气候代理记录,以及 iv) 为特定冰碛提供了更接近的年龄限制,根据初步和公布的放射性碳年龄,这些冰碛大约与 YD 和 H1 事件同时沉积。

项目成果

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Kenneth Young其他文献

Patient and public perceptions of ethical and equitability challenges associated with breast cancer screening and the proposed introduction of Artificial Intelligence (AI) based mammographic screening tools
患者和公众对与乳腺癌筛查以及拟引入基于人工智能(AI)的乳腺 X 线筛查工具相关的伦理和公平性挑战的看法
  • DOI:
    10.1016/j.ejso.2025.109960
  • 发表时间:
    2025-05-01
  • 期刊:
  • 影响因子:
    2.900
  • 作者:
    Rachita Mallya;Hutan Ashrafian;Namrata Malhotra;Aminata Sy;Ara Darzi;Christopher Kelly;Mark Halling-Brown;Lucy Warren;Kenneth Young;Mamatha Reddy;Lisanne Khoo;Deborah Cunningham;Hema Purushothaman;Marc Wilson;Richard Sidebottom;Fiona Gilbert;AIMS Trial Consortium
  • 通讯作者:
    AIMS Trial Consortium
An overview of the rare diseases clinical research network
  • DOI:
    10.1016/j.ymgme.2012.11.146
  • 发表时间:
    2013-02-01
  • 期刊:
  • 影响因子:
  • 作者:
    Renee Leduc;Callyn Hall;Denise Shereff;Jennifer Lloyd;Kenneth Young;Heather Guillette;Jennifer Harris;Laura Gandolfo;David Cuthbertson;Jeffrey P. Krischer
  • 通讯作者:
    Jeffrey P. Krischer
Research assessment in Hong Kong
  • DOI:
    10.1023/a:1017589018092
  • 发表时间:
    2001-07-01
  • 期刊:
  • 影响因子:
    4.600
  • 作者:
    Nigel J. French;William F. Massy;Kenneth Young
  • 通讯作者:
    Kenneth Young

Kenneth Young的其他文献

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{{ truncateString('Kenneth Young', 18)}}的其他基金

Doctoral Dissertation Research: Glacier Recession and Implications for High-Elevation Peatlands
博士论文研究:冰川消退及其对高海拔泥炭地的影响
  • 批准号:
    1333141
  • 财政年份:
    2013
  • 资助金额:
    $ 5.27万
  • 项目类别:
    Standard Grant
CNH: Collaborative Research: Hydrologic Transformation and Human Resilience to Climate Change in the Peruvian Andes
CNH:合作研究:秘鲁安第斯山脉的水文转型和人类对气候变化的适应能力
  • 批准号:
    1010381
  • 财政年份:
    2010
  • 资助金额:
    $ 5.27万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Multi-Scale Investigation of Environmental and Human Influences on the Distribution of Birds in the Western Amazon
博士论文研究:环境和人类对亚马逊西部鸟类分布影响的多尺度调查
  • 批准号:
    0526582
  • 财政年份:
    2005
  • 资助金额:
    $ 5.27万
  • 项目类别:
    Standard Grant
TRP: An ATM Interoperability Testbed for the National Information Infrastructure
TRP:国家信息基础设施的 ATM 互操作性测试平台
  • 批准号:
    9520963
  • 财政年份:
    1995
  • 资助金额:
    $ 5.27万
  • 项目类别:
    Cooperative Agreement
Numerical Simulations of Precipitation Processes
降水过程的数值模拟
  • 批准号:
    7801007
  • 财政年份:
    1978
  • 资助金额:
    $ 5.27万
  • 项目类别:
    Continuing Grant
Dynamics and Microphysics of Stable Orographic Cap Clouds: Comparison Between Theory and Observation
稳定地形帽云的动力学和微观物理:理论与观测的比较
  • 批准号:
    7704287
  • 财政年份:
    1977
  • 资助金额:
    $ 5.27万
  • 项目类别:
    Standard Grant

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  • 项目类别:
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合作研究:(GRGC)检验加勒比省白垩纪超热带气候区的假设
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  • 批准号:
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