Collaborative Research: Continuous vs. episodic fluviodeltaic sedimentation - Implications for carbon sequestration and coastal restoration

合作研究:连续与间歇性河流三角洲沉积——对碳封存和海岸恢复的影响

基本信息

  • 批准号:
    1148247
  • 负责人:
  • 金额:
    $ 5.18万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2012
  • 资助国家:
    美国
  • 起止时间:
    2012-06-15 至 2015-05-31
  • 项目状态:
    已结题

项目摘要

Collaborative Research: Continuous vs. episodic fluviodeltaic sedimentation: Implications for carbon sequestration and coastal restorationbyZhixiong Shen, EAR-1148005, Tulane UniversityWonsuck Kim, EAR-1148247, Univ. Texas, AustinABSTRACTPIs will investigate patterns and rates of late Holocene fluviodeltaic sedimentation with the aid of optically stimulated luminescence (OSL) dating, and explore the potential of land building and organic carbon (OC) sequestration using field data collected from one of the largest clastic depocenters: the Mississippi Delta. This research is not only important scientifically, but also for coastal restoration in the Mississippi Delta that suffers continuous wetland loss.PIs will collect stratigraphic and geochronologic data from overbank deposits along a recently abandoned major distributary of the Mississippi River to test the hypothesis that the clastic stratigraphic record in fluviodeltaic settings consists of a patchwork of discrete sediment bodies that accumulate in an episodic fashion over relatively short time periods. This hypothesis is rooted in a long-standing geological debate that traces back to the early 19th century, centering on the question whether the Earth's stratigraphic record primarily reflects gradual deposition or catastrophic events. This debate is important because understanding the nature of the preserved sedimentary record is critical to interpret changes in the Earth system over geological timescales. Furthermore, they will measure the content and age spectra of OC within fluviodeltaic deposits. The OC content will be used, in combination with the chronologic data, to calculate rates of OC sequestration to test the hypothesis that rates of OC sequestration by clastic overbank deposition can equal or exceed those by swamp peat accretion. Consequently, floodplains and delta plains may constitute an important OC pool that is to date poorly quantified and commonly ignored. The age spectra of the OC will be compared with the OSL dating results to investigate the effect of human activity on OC transport by large rivers. Finally, stratigraphic data will be used to estimate the sediment trapping efficiency of crevasse-splay deposition, a natural analog to artificial river diversions that are currently proposed for coastal restoration. Studying sediment trapping efficiency in the Mississippi Delta, in concert with numerical modeling, will provide critical information to assist in the better estimation of land-building potential by Mississippi River diversions. In addition, the OC sequestration data will provide new insights about potential ecosystem services of restored wetlands.
合作研究:连续性河流三角洲沉积与幕式河流三角洲沉积:碳封存和海岸净化的意义沈志雄,J-1148005,杜兰大学Wonsuck Kim,J-1148247,得克萨斯大学,奥斯汀摘要PI将借助光释光(OSL)测年法研究晚全新世河流三角洲沉积的模式和速率,并利用从最大的碎屑沉积中心之一:密西西比三角洲收集的现场数据,探索土地建设和有机碳(OC)封存的潜力。这项研究不仅在科学上很重要,也用于遭受持续湿地损失的密西西比三角洲的海岸恢复。专业研究人员将沿着最近废弃的密西西比河主要支流收集漫滩沉积物的地层学和地质年代学数据,以检验以下假设:河流三角洲环境中的碎屑地层记录由分散的沉积体拼凑而成,这些沉积体以幕式方式积累,相对较短的时间段。这一假说源于一个长期存在的地质学争论,可以追溯到世纪初,围绕着地球的地层记录主要反映的是逐渐沉积还是灾难性事件的问题。这场辩论很重要,因为理解保存下来的沉积记录的性质对于解释地球系统在地质时间尺度上的变化至关重要。此外,他们还将测量河流三角洲沉积物中OC的含量和年龄谱。将使用OC含量,结合年代学数据,计算OC封存率,以检验碎屑漫滩沉积的OC封存率可以等于或超过沼泽泥炭增生的假设。因此,洪泛平原和三角洲平原可能构成一个重要的有机碳池,迄今为止,量化不佳,通常被忽视。将有机碳的年龄谱与光释光测年结果进行比较,探讨人类活动对大江大河有机碳迁移的影响。最后,地层数据将被用来估计决口扇沉积的沉积物截留效率,人工河流改道,目前提出的海岸恢复的自然模拟。研究沉积物截留效率在密西西比三角洲,与数值模拟,将提供关键信息,以协助更好地估计土地建设潜力的密西西比河改道。此外,有机碳封存数据将提供有关恢复湿地的潜在生态系统服务的新见解。

项目成果

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Wonsuck Kim其他文献

Comment on ‘Clinoform quantification for assessing the effects of external forcing on continental margin development’
关于“评估外强迫对大陆边缘发展影响的斜线量化”的评论
  • DOI:
    10.1111/j.1365-2117.2010.00472.x
  • 发表时间:
    2011
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    A. Petter;Wonsuck Kim;T. Muto;R. Steel
  • 通讯作者:
    R. Steel
A similarity solution for a dual moving boundary problem associated with a coastal-plain depositional system
与海岸-平原沉积体系相关的双移动边界问题的相似解
  • DOI:
    10.1017/s0022112009006715
  • 发表时间:
    2009
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    J. Lorenzo‐Trueba;V. Voller;T. Muto;Wonsuck Kim;C. Paola;J. Swenson
  • 通讯作者:
    J. Swenson
Lowland river sinuosity on Earth and Mars set by the pace of meandering and avulsion
地球和火星上的低地河流蜿蜒曲折,由蜿蜒和撕裂的速度决定
  • DOI:
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    18.3
  • 作者:
    Chenliang Wu;Wonsuck Kim;Ryan Herring;B. Cardenas;T. Dong;Hongbo Ma;A. Moodie;J. Nittrouer;F. Tsai;An Li
  • 通讯作者:
    An Li
The Use of Imagery in Laboratory Experiments
图像在实验室实验中的应用
  • DOI:
    10.1002/9781119940791.ch13
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Tal;P. Frey;Wonsuck Kim;E. Lajeunesse;A. Limare;F. Métivier
  • 通讯作者:
    F. Métivier
Predicting paleohydraulics from storm surge and tsunami deposits: Using experiments to improve inverse model accuracy
预测风暴潮和海啸沉积物的古水力学:利用实验提高反演模型的准确性
  • DOI:
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Joel P. L. Johnson;K. Delbecq;Wonsuck Kim
  • 通讯作者:
    Wonsuck Kim

Wonsuck Kim的其他文献

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{{ truncateString('Wonsuck Kim', 18)}}的其他基金

RCN: Building a Sediment Experimentalist Network (SEN)
RCN:建立沉积物实验员网络(SEN)
  • 批准号:
    1324760
  • 财政年份:
    2013
  • 资助金额:
    $ 5.18万
  • 项目类别:
    Standard Grant
Collaborative Research: Sea-level Rise and Vegetation Controls on Deltaic Landform Evolution: A Coupled Experimental and Numerical Modeling Study
合作研究:海平面上升和植被对三角洲地貌演化的控制:实验与数值模拟的耦合研究
  • 批准号:
    1324335
  • 财政年份:
    2013
  • 资助金额:
    $ 5.18万
  • 项目类别:
    Continuing Grant
Calling All Experimentalists: EarthCube domain end-user workshop to address community needs for sharing and managing experimental data and techniques: Year 1 Experimental stratigr
召集所有实验者:EarthCube 域最终用户研讨会,以满足社区共享和管理实验数据和技术的需求:第一年实验策略
  • 批准号:
    1252324
  • 财政年份:
    2012
  • 资助金额:
    $ 5.18万
  • 项目类别:
    Standard Grant

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