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Advective Controls on Organic Carbon Export and Burial on the Northwest Atlantic Margin

Advective Controls on Organic Carbon Export and Burial on the Northwest Atlantic Margin
对西北大西洋边缘有机碳输出和埋藏的平流控制
批准号:
0425677
负责人:
Timothy Eglinton
金额:
$70.5万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2004
资助国家:
美国
项目状态:
已结题
起止时间:
2004-09-01 至 2008-02-29

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英文摘要
ABSTRACTOCE-0425677A growing body of evidence indicates that oceanic particulate organic matter (OM) is subject to extensive redistribution by bottom currents so that material at a given depositional location may be substantially pre-aged and remote from its site of formation. Processes that impart spatial and temporal decoupling of OM sources and sinks may be particularly prevalent on continental margins where particles can be laterally advected down- and along-slope, and ultimately exported to the ocean interior. Researchers at Woods Hole Oceanographic Institution have pooled their expertise in geochemistry, sedimentology and physical oceanography to document these processes on the N.W. Atlantic margin. Beginning in Spring 2004, an array of moored physical oceanographic instrumentation and coordinated shipboard measurements will establish in the dynamics of the Deep Western Boundary Current and its interactions with the Gulf Stream in unprecedented detail. For this project, the researchers will augment the moorings with transmissometers and collect sediments, sediment trap samples and suspended particles for detailed geochemical, isotopic and mineralogical analyses, permitting them to constrain the nature, provenance, age and fluxes of particles and organic matter transported via lateral advection and to help establish its ultimate depositional fate. A broader impact will be a better ability to identify other areas that may be similarly affected, and hence to establish its global significance. If these processes are widespread, this finding would have important implications for our understanding of the global carbon cycle since the hypothesized transport mechanism of benthic "storms" is climatically controlled. An ability to recognize diagnostic sediment and OM accumulation patterns could also be identified in the sedimentary record and unambiguously interpreted in the context of climate change.
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Enhancement of Capabilities for Molecular-Level Radiocarbon Studies of Water Column and Sedimentary Organic Matter
  • 批准号:
    0648347
  • 项目类别:
    Standard Grant
  • 资助金额:
    $39.3万
  • 财政年份:
    2007
  • 负责人:
    Timothy Eglinton
  • 依托单位:
Influence of Pre- and Post-depositional Processes on Sedimentary Organic Matter Composition
  • 批准号:
    0526268
  • 项目类别:
    Standard Grant
  • 资助金额:
    $59.21万
  • 财政年份:
    2005
  • 负责人:
    Timothy Eglinton
  • 依托单位:
Collaborative Research: Changing Holocene Environments of the Eastern Tropical Atlantic (CHEETA)
  • 批准号:
    0402533
  • 项目类别:
    Standard Grant
  • 资助金额:
    $32.71万
  • 财政年份:
    2004
  • 负责人:
    Timothy Eglinton
  • 依托单位:
The Influence of Sediment Dynamics on Molecular and Microfossil Proxy Records
  • 批准号:
    0327405
  • 项目类别:
    Standard Grant
  • 资助金额:
    $44.1万
  • 财政年份:
    2003
  • 负责人:
    Timothy Eglinton
  • 依托单位:
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