(ESH) Holocene Climatic Variations in the Midcontinent of North America: Analyses of Annually Laminated Sediments from Minnesota Lakes

(ESH) 北美中部大陆全新世气候变化:明尼苏达湖年度层积沉积物分析

基本信息

  • 批准号:
    9905327
  • 负责人:
  • 金额:
    $ 18万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1999
  • 资助国家:
    美国
  • 起止时间:
    1999-10-01 至 2003-09-30
  • 项目状态:
    已结题

项目摘要

Annually laminated sediments (varves) from lakes provide a unique vehicle to acquire continental paleoclimatic data with secure chronologies. This proposal seeks to analyze varved sediments from four Minnesota lakes for a suite of geochemical, sedimentological, and biological proxies to assess Holocene climatic variability in the midcontinent of North America. These proxies include varve thickness, organic and inorganic carbon, detrital minerals, mineralogical composition, grain size, oxygen and carbon isotopes of carbonates and ostracode shells, trace-element composition of ostracode shells, and pollen. The research objectives are: (1) Calibrate various climatic proxies in varved sediments with instrumental weather data for the last 100 years to evaluate how each proxy is related to climatic factors, (2) Assess Holocene climatic variations, particularly cyclic and abrupt changes, by interpreting proxy records from our study sites on the basis of calibration results, (3) Integrate new varved-sediment data with findings from other high-resolution paleoclimatic studies in adjacent areas to provide a regional synthesis of Holocene climatic variations, (4) Compare patterns of climatic fluctuations in the midcontinent of North America with those in Greenland, the North Atlantic, and other parts of the globe to evaluate mechanisms of Holocene climatic variability.
来自湖泊的年度层状沉积物(varve)提供了一种独特的工具,可以获取具有安全年代的大陆古气候数据。 该提案旨在分析明尼苏达州四个湖泊的变化沉积物,以获得一套地球化学、沉积学和生物指标,以评估北美中部大陆全新世的气候变化。 这些指标包括藻体厚度、有机和无机碳、碎屑矿物、矿物成分、粒度、碳酸盐和介形虫壳的氧和碳同位素、介形虫壳的微量元素组成和花粉。 研究目标是:(1) 使用过去 100 年的仪器天气数据校准变体沉积物中的各种气候代理,以评估每个代理与气候因素的关系,(2) 根据校准结果解释我们研究地点的代理记录,评估全新世气候变化,特别是周期性和突变,(3) 将新的变体沉积物数据与其他高分辨率古气候的发现相结合 (4) 将北美中部大陆与格陵兰岛、北大西洋和全球其他地区的气候波动模式进行比较,以评估全新世气候变化的机制。

项目成果

期刊论文数量(0)
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Feng Sheng Hu其他文献

A 14,500-year record of landscape change from Okpilak Lake, northeastern Brooks Range, northern Alaska
阿拉斯加北部布鲁克斯山脉东北部的奥克皮拉克湖 14,500 年来的地貌变化记录
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    2.1
  • 作者:
    W. Wyatt Oswald;D. Gavin;P. Anderson;L. Brubaker;Feng Sheng Hu
  • 通讯作者:
    Feng Sheng Hu
Integrating Different Data Sources Using a Bayesian Hierarchical Model to Unveil Glacial Refugia
使用贝叶斯分层模型整合不同的数据源来揭开冰川保护区的面纱
Using SPIRAL (Single Pollen Isotope Ratio AnaLysis) to estimate C<sub>3</sub>- and C<sub>4</sub>-grass abundance in the paleorecord
  • DOI:
    10.1016/j.epsl.2008.03.001
  • 发表时间:
    2008-05-15
  • 期刊:
  • 影响因子:
  • 作者:
    David M. Nelson;Feng Sheng Hu;Daniel R. Scholes;Neeraj Joshi;Ann Pearson
  • 通讯作者:
    Ann Pearson
Scanning micro‐X‐ray fluorescence elemental mapping: A new tool for the study of laminated sediment records
扫描微X射线荧光元素图:研究层状沉积物记录的新工具
  • DOI:
    10.1029/2007gc001800
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    T. Shanahan;J. Overpeck;J. B. Hubeny;John W. King;Feng Sheng Hu;K. Hughen;Gifford H. Miller;J. L. Black
  • 通讯作者:
    J. L. Black
A ∼33,000 year record of environmental change from Arolik Lake, Ahklun Mountains, Alaska, USA
美国阿拉斯加阿克伦山脉阿罗利克湖约 33,000 年来的环境变化记录
  • DOI:
  • 发表时间:
    2003
  • 期刊:
  • 影响因子:
    0
  • 作者:
    D. Kaufman;Feng Sheng Hu;J. Briner;A. Werner;B. Finney;I. Gregory‐Eaves
  • 通讯作者:
    I. Gregory‐Eaves

Feng Sheng Hu的其他文献

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{{ truncateString('Feng Sheng Hu', 18)}}的其他基金

Advancing Arctic Paleoecology: An Integrative Approach to Understanding Species Refugia and Population Dynamics in Response to Late-Quaternary Climate Change
推进北极古生态学:了解物种保护区和种群动态以应对晚第四纪气候变化的综合方法
  • 批准号:
    1418339
  • 财政年份:
    2014
  • 资助金额:
    $ 18万
  • 项目类别:
    Standard Grant
Collaborative Research: Nonlinearities in the Arctic climate system during the Holocene
合作研究:全新世北极气候系统的非线性
  • 批准号:
    0907986
  • 财政年份:
    2010
  • 资助金额:
    $ 18万
  • 项目类别:
    Standard Grant
Collaborative Research: Integrating paleoecological analysis and ecological modeling to elucidate the responses of tundra fire regimes to climate change
合作研究:整合古生态分析和生态模型来阐明苔原火灾状况对气候变化的响应
  • 批准号:
    1023477
  • 财政年份:
    2010
  • 资助金额:
    $ 18万
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: The Role of Permafrost and Soil Development in Boreal-Forest Responses to Holocene Climatic Change
论文研究:永久冻土和土壤发育在北方森林对全新世气候变化反应中的作用
  • 批准号:
    0910262
  • 财政年份:
    2009
  • 资助金额:
    $ 18万
  • 项目类别:
    Standard Grant
Fire, Atmospheric pCO2, and Climate as Alternative Primary Controls of C4-Grass Abundance: The Late-Quaternary Perspective
火灾、大气 pCO2 和气候作为 C4 草丰度的替代主要控制因素:晚第四纪视角
  • 批准号:
    0816610
  • 财政年份:
    2008
  • 资助金额:
    $ 18万
  • 项目类别:
    Continuing Grant
Collaborative Research: Impacts of Climatic Change on the Boreal-Forest Fire Regimes of Alaska: Lessons from the Past and Prospects for the Future
合作研究:气候变化对阿拉斯加北方森林火灾状况的影响:过去的教训和未来的展望
  • 批准号:
    0612366
  • 财政年份:
    2006
  • 资助金额:
    $ 18万
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH:Seeking Evidence for Glacial Refugia of North American White Spruce
论文研究:寻找北美白云杉冰川保护区的证据
  • 批准号:
    0508748
  • 财政年份:
    2005
  • 资助金额:
    $ 18万
  • 项目类别:
    Standard Grant
COLLABORATIVE RESEARCH: A SYNTHESIS OF THE LAST 2000 YEARS OF CLIMATIC VARIABILITY FROM ARCTIC LAKES
合作研究:过去 2000 年北冰洋湖泊气候变化的综合
  • 批准号:
    0455102
  • 财政年份:
    2005
  • 资助金额:
    $ 18万
  • 项目类别:
    Continuing Grant
Collaborative Research: Holocene Climatic Variability in Southern Alaska -- Quantitative Estimates of Temperature and Precipitation, Warm Intervals, and Possible Cyclicity
合作研究:阿拉斯加南部全新世气候变化——温度和降水、温暖间隔和可能的周期性的定量估计
  • 批准号:
    0318404
  • 财政年份:
    2003
  • 资助金额:
    $ 18万
  • 项目类别:
    Continuing Grant
Climatic and Ecological Controls on the Holocene Range Expansion of Western Hemlock and Western Redcedar in the Interior Pacific Northwest
西北内陆地区西部铁杉和西部红杉全新世范围扩张的气候和生态控制
  • 批准号:
    0212917
  • 财政年份:
    2002
  • 资助金额:
    $ 18万
  • 项目类别:
    Standard Grant

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合作研究:P2C2:全新世晚期气候变化背景下密西西比河下游的极端洪水
  • 批准号:
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