Collaborative Research: Sub-Millennial Hydroclimatic Variability in the Northeastern United States during the Holocene

合作研究:全新世美国东北部次千年水文气候变化

基本信息

  • 批准号:
    0602408
  • 负责人:
  • 金额:
    $ 13.55万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2006
  • 资助国家:
    美国
  • 起止时间:
    2006-08-01 至 2010-09-30
  • 项目状态:
    已结题

项目摘要

Hydrologic variability poses significant challenges to society. However, the potential for hydrologic change remains poorly understood. Sedimentary patterns within small lake basins record past changes in water levels and can be used to track shifts in moisture availability over time. This study assesses hydrologic variability at the scale of millennia and centuries over the past 11,000 years in Massachusetts, where existing lake sedimentary data appear to indicate significant changes in the frequency of past droughts. The creation, analysis, and synthesis of new, well-resolved sedimentary data, in combination with detailed fossil pollen data, is used to evaluate sub-millennial hydrologic variability, its controls, and its effects.Intellectual MeritPast hydroclimatic variation is poorly understood, especially in humid temperate regions. Little is known about the frequency, magnitude, and cause of variations. Stratigraphic records of lakelevel change in the northeastern U.S. can provide new insight into important regional to global climatic processes. High-resolution geophysical surveys and sediment cores of lakes in the northeastern U.S. have documented climatically meaningful patterns in the sedimentary record - and indicate possible changes in high-frequency hydrologic variability. Existing data appear to indicate a series of low lake stands of millennial and sub-millennial duration between 6000 and 2000 years ago in contrast to little variability on these time scales during earlier and later portions of the Holocene. This grant studies four lakes to produce detailed lake-level histories. Similarities and differences among the histories are used to evaluate past hydroclimatic changes and to better understand the causes of the apparent high frequency variation. Temperature reconstructions also indicate warmer than modern winters in the northeastern U. S. in the mid-Holocene. Given the potential to understand the effects of future climate warming through analogy, this project evaluates possible linkages between past warmth and hydroclimatic variation. By comparing sediment and pollen data, the group also investigates biotic responses to past climatic changes.Broader ImpactsWater is a vital resource and risk of drought is a major societal concern. Questions exist about the potential for dramatic hydrologic change in humid, heavily populated regions like the eastern U.S. Expectations of future climate warming increase the need to understand the mechanisms that drive changes in water resources. This study offers important baseline data regarding the range of regional hydrologic variability and its ecological impacts. This data provides insight into water resource responses to climatic conditions like those predicted for the future. The results of this study are useful to a wide variety of stakeholders from agricultural businesses to habitat conservation groups and municipalities concerned with managing water supplies and mitigating drought risk. Resource managers and policy makers have access to the results to make informed decisions. This project also advances the development of young researchers while promoting innovative science.
水文变异性对社会构成了重大挑战。但是,水文变化的潜力仍然很少理解。小湖盆地内的沉积模式记录了过去水位的变化,可用于跟踪随着时间的流逝的水分可用性的变化。这项研究评估了过去11,000年的千年和几个世纪的水文变异性在马萨诸塞州,现有的湖泊沉积数据似乎表明过去干旱的频率发生了重大变化。与详细的化石花粉数据相结合,新的,分辨出良好的沉积数据的创建,分析和合成用于评估千禧年的水文变异性,其控制和其效果。Intlectualrepitpast firitpast sydroclipalial气候变化是众所周知的,尤其是在潮湿的温柔区域。关于变化的频率,大小和原因,知之甚少。美国东北部湖泊变化的地层记录可以为全球气候过程的重要区域提供新的见解。美国东北部湖泊的高分辨率地球物理调查和沉积物核心已记录了沉积记录中的气候有意义的模式,并表明高频水文变异性可能发生变化。现有数据似乎表明6000至2000年前的一系列低湖泊千禧一代和近千禧一代持续时间与全新世早期和更晚期的这些时间尺度几乎没有变化相反。该赠款研究了四个湖泊,以产生详细的湖泊水平历史。历史之间的相似性和差异用于评估过去的氢化气候变化,并更好地了解明显的高频变化的原因。温度重建还表明,在全新世中部美国东北部的现代冬季比现代冬季都要温暖。鉴于有可能通过类比了解未来气候变暖的影响,因此该项目评估了过去的温暖与氢化气候变化之间的可能联系。通过比较沉积物和花粉数据,该小组还调查了对过去气候变化的生物反应。BroaderImpactswater是重要的资源,干旱的风险是一个主要的社会问题。关于在美国东部对未来气候变暖的期望等潮湿,人口稠密地区进行急剧水文变化的可能性变化的可能性存在问题,这增加了了解驱动水资源变化的机制的需求。这项研究提供了有关区域水文变异范围及其生态影响范围的重要基线数据。这些数据提供了对水资源对气候条件的反应的见解,就像未来预期的那样。这项研究的结果对从农业企业到栖息地保护小组以及与管理水供应并减轻干旱风险有关的各种利益相关者很有用。资源经理和政策制定者可以访问结果以做出明智的决定。该项目还推动了年轻研究人员的发展,同时促进了创新的科学。

项目成果

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Bryan Shuman其他文献

Bryan Shuman的其他文献

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{{ truncateString('Bryan Shuman', 18)}}的其他基金

Rocky Mountain snowpack changes and their hydrologic consequences during the Holocene
全新世落基山积雪变化及其水文后果
  • 批准号:
    1903729
  • 财政年份:
    2019
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
Collaborative Research: Mechanisms of tree population collapses in eastern North America: Disentangling causes of abrupt ecological change during the Holocene
合作研究:北美东部树木种群崩溃的机制:解开全新世生态突变的原因
  • 批准号:
    1856047
  • 财政年份:
    2019
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
Collaborative Research: Causes and consequences of fire-regime variability in Rocky Mountain forests
合作研究:落基山森林火灾状况变化的原因和后果
  • 批准号:
    1655189
  • 财政年份:
    2017
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
COLLABORATIVE RESEARCH: Interacting influences of climate, land use, and other disturbances on regime shifts in forest ecosystems: Holocene dynamics in the northeastern US
合作研究:气候、土地利用和其他干扰因素对森林生态系统格局转变的相互作用影响:美国东北部的全新世动态
  • 批准号:
    1146297
  • 财政年份:
    2012
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
Collaborative Research: Sub-Millennial Hydroclimatic Variability in the Northeastern United States during the Holocene
合作研究:全新世美国东北部次千年水文气候变化
  • 批准号:
    1036191
  • 财政年份:
    2010
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
CAREER: Effects of Prolonged Droughts, Severe Fires, and Forest Parasites on Regional Ecosystem Pattern in the Rocky Mountains Over the Past 5,000 Years
职业:过去 5000 年来长期干旱、严重火灾和森林寄生虫对落基山脉区域生态系统格局的影响
  • 批准号:
    0845129
  • 财政年份:
    2009
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Continuing Grant
Collaborative Research: Ecosystem Responses to Progressive and Rapid Climate Change During the Holocene in New England
合作研究:新英格兰全新世期间生态系统对渐进和快速气候变化的反应
  • 批准号:
    0816731
  • 财政年份:
    2008
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Changing Spatial Patterns of Rocky Mountain Snowpack During the Holocene and Their Effects on Ecological Boundaries
博士论文研究:全新世落基山积雪的空间格局变化及其对生态边界的影响
  • 批准号:
    0623442
  • 财政年份:
    2007
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Comparing the Effects of Holocene and 20th Century Drought on Minnesota's Lakes
博士论文研究:比较全新世和 20 世纪干旱对明尼苏达州湖泊的影响
  • 批准号:
    0526314
  • 财政年份:
    2005
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant
Collaborative Research: Surface-Atmosphere Feedbacks and Holocene Climate Variations in Eastern North America: Linkages, Impacts, and Governing Mechanisms
合作研究:北美东部地表大气反馈和全新世气候变化:联系、影响和治理机制
  • 批准号:
    0402308
  • 财政年份:
    2003
  • 资助金额:
    $ 13.55万
  • 项目类别:
    Standard Grant

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