Collaborative Research: Constrainging Water Mass Age and Particle Flux In The Arctic Ocean Using Pa-231 and TH-230 as Tracers

合作研究:使用 Pa-231 和 TH-230 作为示踪剂限制北冰洋的水团年龄和粒子通量

基本信息

  • 批准号:
    0002313
  • 负责人:
  • 金额:
    $ 15.72万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2001
  • 资助国家:
    美国
  • 起止时间:
    2001-01-01 至 2004-12-31
  • 项目状态:
    已结题

项目摘要

Abstract OPP-0002313MoranOPP-0004029EdwardsThis is a collaborative proposal between Principal Investigators at the Universities of Rhode Island and Minnesota-Twin Cities. The Arctic Ocean is much more dynamic than previously believed, characterized by large spatial and seasonal variations in productivity and associated particle flux, significant estuarine input and lateral intrusions of shelf water extending into the interior basins, and topographically-steered boundary currents along the perimeters of basins that result in regional extremes in water mass age. The Principal Investigators hypothesize that "boundary scavenging", controlled by a combination of lateral advection and particle flux, plays a significant role in the removal of particle-reactive chemicals from the water column of the Arctic Ocean. They will evaluate the role of boundary scavenging as it has an important bearing on such key geochemical processes such as the export of carbon to deep waters, the sediment accumulation of reactive chemicals, including contaminants, and the export of these chemicals to the Atlantic. The objective is to constrain these fundamental processes on a basin-wide scale and to develop predictive biogeochemical models for this poorly understood and extreme environment. The Principal Investigators will determine whether that natural radionuclide Protactinium-231 (231Pa) - Thorium -230 (231Th) pair can be used as tracers to provide an integrated picture of water mass age and particle flux on a basin-wide scale in the modem and last glacial Arctic.To provide an increased understanding of the processes that control the redistribution of these tracers in the Arctic Ocean, the Principal Investigators will undertake a comprehensive study that includes paired 231Pa - 231Th analyses in dissolved and particulate samples from the water column, sediment trap material, surface sediments and sediment comes. This should help with a better understanding of the importance of particle composition on 231Pa - 231Th fractionation by quantifying the chemical composition of suspended particulate matter, sediment trap material and surface sediments. Boundary scavenging should be pronounced in the Arctic, due to the combined effects of the high ratio of shelf to open ocean, the regional extremes in water mass age and particle flux, and a dynamic circulation. This environmental setting is markedly different than other ocean regions where Pa and Th tracer studies have been conducted and provides a unique opportunity to investigate boundary scavenging and, in turn, constrain some outstanding questions regarding the paleo-application of 231Pa - 231Th.
这是罗德岛大学和明尼苏达双城大学的主要研究人员之间的合作提案。北冰洋的动态比以前认为的要大得多,其特点是生产力和相关颗粒通量的空间和季节变化很大,大量的河口输入和陆架水的侧向侵入延伸到内部盆地,以及地形引导的边界流沿着盆地的周长导致水团年龄的区域极端。主要研究人员假设,由横向平流和粒子通量共同控制的“边界清除”在北冰洋水柱中粒子反应性化学物质的清除中起着重要作用。他们将评估边界清除的作用,因为它对诸如向深水输出碳、包括污染物在内的活性化学物质的沉积物积累以及向大西洋输出这些化学物质等关键地球化学过程具有重要影响。目标是在整个流域范围内限制这些基本过程,并为这种知之甚少的极端环境开发预测性生物地球化学模型。主要研究人员将确定天然放射性核素镤-231 (231Pa) -钍-230 (231Th)对是否可以用作示踪剂,以提供现代和末次冰期北极全流域水团年龄和粒子通量的综合图像。为了更好地了解北冰洋中这些示踪剂重新分布的控制过程,主要研究人员将进行一项全面的研究,包括对来自水柱、沉积物捕集器材料、地表沉积物和沉积物的溶解和颗粒样品进行配对的231Pa - 231Th分析。通过量化悬浮颗粒物、沉积物捕集器物质和地表沉积物的化学成分,这将有助于更好地理解颗粒组成对231Pa - 231Th分选的重要性。由于大陆架与公海的高比率、水团年龄和粒子通量的区域极值以及动力环流的综合影响,北极的边界清除应该是明显的。这种环境背景与其他海洋地区的Pa和Th示踪剂研究明显不同,为研究边界清除提供了独特的机会,从而限制了有关231Pa - 231Th古应用的一些悬而未决的问题。

项目成果

期刊论文数量(0)
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Stephen Moran其他文献

Extending the nurse practitioner concurrent intervention model to community-acquired pneumonia and chronic obstructive pulmonary disease.
将执业护士同步干预模式扩展到社区获得性肺炎和慢性阻塞性肺疾病。
  • DOI:
    10.1016/s1549-3741(04)30043-2
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    P. Gross;Linda A. Aho;H. Ashtyani;J. Levine;M. McGee;Stephen Moran;T. Anton;Joseph Feldman;Arpi G. Kuyumjian;J. Skurnick
  • 通讯作者:
    J. Skurnick
WUN101-01: First in Human Human (FIH) Phase 1 Study of WU-NK-101 (W-NK1) in Patients with Relapsed or Refractory (R/R) Acute Myeloid Leukemia (AML)
  • DOI:
    10.1182/blood-2024-201520
  • 发表时间:
    2024-11-05
  • 期刊:
  • 影响因子:
  • 作者:
    Amanda F. Cashen;MHD Monzr M. Al Malki;Don A. Stevens;Lori Muffly;Natasha Edwin;Edward Abadir;Peter Tan;Sandrine Niyongere;Ashish Bajel;Laura Arthur;Nitin Mahajan;Ben Capoccia;Tom Leedom;Basia Muz;Kristann Magee;Ouiam Bakkacha;Justo L. Gonzalez;Deborah Masters;Stephen Moran;Eileen McNulty
  • 通讯作者:
    Eileen McNulty
WU-CART-007 (WT-7) Is an Effective Treatment for Adolescent Patients with Relapsed or Refractory (R/R) T-Cell Acute Lymphoblastic Leukemia/ Lymphoblastic Lymphoma (T-ALL/LBL) - Subgroup Analysis of WU-CART-007 1001
  • DOI:
    10.1182/blood-2024-201998
  • 发表时间:
    2024-11-05
  • 期刊:
  • 影响因子:
  • 作者:
    Shannon L. Maude;Deepa Bhojwani;Alan S. Wayne;Friso G. J. Calkoen;André Baruchel;Christian Michel Zwaan;Michael P. Rettig;Ouiam Bakkacha;Justo L. Gonzalez;Deborah Masters;Maria del Rosario;Laura Simpson;Preeta Dasgupta;Tony Wu;Stephen Moran;Michael Munroe;Haley Irons;Eileen McNulty;Matthew L. Cooper;Alexander Hamil
  • 通讯作者:
    Alexander Hamil
WU-CART-007 (WT-7), an Allogeneic CAR T-Cell Targeting CD7 in Relapsed/Refractory (R/R) T-Cell Acute Lymphoblastic Leukemia/Lymphoma (T-ALL/LBL): Phase 2 Results
  • DOI:
    10.1182/blood-2024-202005
  • 发表时间:
    2024-11-05
  • 期刊:
  • 影响因子:
  • 作者:
    Armin Ghobadi;Ibrahim Aldoss;Shannon L. Maude;Deepa Bhojwani;Rawan Faramand;Ashish Bajel;Friso G. J. Calkoen;Alan S. Wayne;Bhagirathbhai Dholaria;Ryan J Mattison;Anita W. Rijneveld;Christian Michel Zwaan;André Baruchel;Nicolas Boissel;Michael P. Rettig;Maria del Rosario;Stephen Moran;Alexander Hamil;Ouiam Bakkacha;Deborah Masters
  • 通讯作者:
    Deborah Masters

Stephen Moran的其他文献

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{{ truncateString('Stephen Moran', 18)}}的其他基金

University of Alaska Fairbanks/Sikuliaq Ship Operations
阿拉斯加大学费尔班克斯分校/Sikuliaq 船舶运营
  • 批准号:
    1827437
  • 财政年份:
    2018
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Cooperative Agreement
Research Vessel (R/V) SIKULIAQ SHIP OPERATIONS for 2014-2016
研究船 (R/V) SIKULIAQ 2014-2016 年船舶运营情况
  • 批准号:
    1456100
  • 财政年份:
    2014
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Cooperative Agreement
Collaborative Research: GEOTRACES Intercalibration of 230Th, 231Pa, 10Be, REE, Nd isotopes and selected man-made radionuclides
合作研究:GEOTRACES 230Th、231Pa、10Be、REE、Nd 同位素和选定的人造放射性核素的相互校准
  • 批准号:
    0752278
  • 财政年份:
    2008
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Standard Grant
Collaborative Research: Determining the present and future ocean carbon dynamics in the Chukchi Sea and pan-Arctic Ocean: A Contribution to Shelf-Basin Interactions (SBI) Phase III
合作研究:确定楚科奇海和泛北冰洋当前和未来的海洋碳动态:对陆架盆地相互作用(SBI)第三阶段的贡献
  • 批准号:
    0731945
  • 财政年份:
    2007
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Standard Grant
Collaborative Research: Field and Modeling Studies of the Magnitude and Variability of 234Th-Based Estimates of POC Export Flux and Remineralization in the Upper Ocean
合作研究:基于 234Th 的 POC 输出通量和上层海洋再矿化估计的幅度和变异性的现场和建模研究
  • 批准号:
    0327721
  • 财政年份:
    2003
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Standard Grant
Collaborative SBI Research: Carbon Cycling in the Chukchi and Beaufort Seas-Field and Modeling Studies
SBI 合作研究:楚科奇海和波弗特海的碳循环现场和模拟研究
  • 批准号:
    0124917
  • 财政年份:
    2002
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Continuing Grant
230Th and 231Pa: Tracers of Particle Flux and Ventilation in the Atlantic
230Th 和 231Pa:大西洋粒子通量和通风的示踪剂
  • 批准号:
    9730257
  • 财政年份:
    1998
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Continuing Grant
SGER: Natural and Artificial Radionuclides as Tracers of Particle Cycling and Circulation Time Scales in the Arctic Ocean
SGER:天然和人造放射性核素作为北冰洋粒子循环和循环时间尺度的示踪剂
  • 批准号:
    9408945
  • 财政年份:
    1994
  • 资助金额:
    $ 15.72万
  • 项目类别:
    Standard Grant

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