Selecting and Applying an Inverse Method to Infer Particle Dynamics from GEOTRACES Data
选择并应用反演方法从 GEOTRACES 数据推断粒子动力学
基本信息
- 批准号:1232578
- 负责人:
- 金额:$ 52.94万
- 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:2012-08-15 至 2016-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Processes affecting ocean particles have important consequences for the marine biogeochemical cycles of trace elements; however, our present understanding of these processes is incomplete, as shown by the very large uncertainties (spanning orders of magnitude) of current estimates of particle cycling rates in the ocean. The extensive trace element dataset being generated as part of the GEOTRACES program provides an opportunity to enhance our knowledge of particle processes in a variety of oceanic environments. A scientist from Woods Hole Oceanographic Institution plans to determine the adequacy of different inverse methods to constrain particle processes such as solid-solution exchange and particle processes in the water column from measurements of thorium isotope activity, particle composition, and particle concentration in different size fractions. To attain this goal, the researcher would first assess the adequacy of different inverse methods to infer, from such an eclectic dataset, rate constants of sorption reactions (adsorption and desorption) and particle dynamics (aggregation, disaggregation, sinking, and remineralization). The second step would involve applying the selected method to estimate these constants and their uncertainties at the "superstations" of the GEOTRACES North Atlantic Zonal Section. Once the model is in place, the scientist would test the hypotheses that the rate constants varied (1) vertically within the mesopelagic layer and the deeper layers at these stations and (2) horizontally across the diverse environments sampled along the section.Broader Impacts: The software to be developed would be archived with the Biological and Chemical Oceanography Data Management Office with instructions so other scientist can use it. One graduate student would be trained on the use of inverse methods in data analyses.
影响海洋颗粒的过程对微量元素的海洋生物地球化学循环有重要影响;然而,我们目前对这些过程的理解是不完整的,如目前对海洋颗粒循环速率的估计存在很大的不确定性(跨越数量级)所示。作为GEOTRACES计划的一部分,正在生成的广泛的微量元素数据集提供了一个机会,以提高我们对各种海洋环境中粒子过程的了解。 来自伍兹霍尔海洋研究所的一位科学家计划通过测量钍同位素活性、颗粒成分和不同粒径组分的颗粒浓度,确定不同的逆方法是否足以限制颗粒过程,如水柱中的固溶体交换和颗粒过程。为了实现这一目标,研究人员将首先评估不同的逆方法的充分性,从这样一个折衷的数据集,吸附反应(吸附和解吸)和颗粒动力学(聚集,解聚,下沉和再矿化)的速率常数推断。第二步将涉及应用选定的方法来估计GEOTRACES北大西洋带状部分的“超级站”的这些常数及其不确定性。一旦建立了模型,科学家将检验以下假设:(1)在这些站点的中层和深层内,速率常数在垂直方向上是变化的;(2)在沿剖面沿着取样的不同环境中,速率常数在水平方向上是变化的。将开发的软件将在生物和化学海洋学数据管理办公室存档,并附有说明,以便其他科学家可以使用。一名研究生将接受关于在数据分析中使用逆向方法的培训。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Olivier Marchal其他文献
Contribution of <sup>230</sup>Th measurements to the estimation of the abyssal circulation
- DOI:
10.1016/j.dsr.2007.01.002 - 发表时间:
2007-04-01 - 期刊:
- 影响因子:
- 作者:
Olivier Marchal;Roger François;Jan Scholten - 通讯作者:
Jan Scholten
Hamiltonian Representation of Isomonodromic Deformations of Twisted Rational Connections: The Painlevé 1 Hierarchy
- DOI:
10.1007/s00220-024-05187-0 - 发表时间:
2024-12-10 - 期刊:
- 影响因子:2.600
- 作者:
Olivier Marchal;Mohamad Alameddine - 通讯作者:
Mohamad Alameddine
Топологическое разложение модели $\beta$-ансамбля и квантовая алгебраическая геометрия в рамках секторного подхода@@@Topological expansion of the $\beta$-ensemble model and quantum algebraic geometry in the sectorwise approach
Топологическое разложение модели $eta$-ансамбля и квантовая алгебраическая геометрия в $eta$-系综模型的拓扑展开和扇区方法中的量子代数几何
- DOI:
10.4213/tmf6603 - 发表时间:
2011 - 期刊:
- 影响因子:0
- 作者:
Леонид Олегович Чехов;L. Chekhov;Б Эйнард;Bertrand Eynard;О Маршал;Olivier Marchal - 通讯作者:
Olivier Marchal
Hearing the shape of an arena with spectral swarm robotics
使用光谱群机器人聆听竞技场的形状
- DOI:
- 发表时间:
2024 - 期刊:
- 影响因子:0
- 作者:
L. Cazenille;Nicolas Lobato;Alessia Loi;Mika Ito;Olivier Marchal;N. Aubert;Nicolas Bredèche;A. Genot - 通讯作者:
A. Genot
An inverse modelling approach to constrain sup7/supBe cycling in the subpolar North Atlantic
一种限制亚北极北大西洋中 sup7/supBe 循环的反演建模方法
- DOI:
10.1016/j.dsr.2025.104465 - 发表时间:
2025-06-01 - 期刊:
- 影响因子:2.100
- 作者:
Paul Lerner;Mélanie Grenier;Olivier Marchal;Pieter van Beek - 通讯作者:
Pieter van Beek
Olivier Marchal的其他文献
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{{ truncateString('Olivier Marchal', 18)}}的其他基金
Evolution of Glacial Meltwater in the North Atlantic Current - Subpolar Front System
北大西洋洋流-副极锋系统中冰川融水的演化
- 批准号:
2202771 - 财政年份:2022
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Deep-sea sediment redistribution induced by a meandering Gulf Stream
蜿蜒的墨西哥湾流引起的深海沉积物重新分布
- 批准号:
1949536 - 财政年份:2020
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Offshore Export of Glacial Water and Ice in an Eddying Ocean
涡流海洋中冰川水和冰的近海输出
- 批准号:
1903427 - 财政年份:2019
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Collaborative Proposal: Estimation of particle aggregation and disaggregation rates from the inversion of chemical tracer data
合作提案:通过化学示踪数据反演估计颗粒聚集和解聚率
- 批准号:
1829790 - 财政年份:2018
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
A Least-Squares Fit of an Ocean Model to Deglacial Radiocarbon Records
海洋模型与冰下放射性碳记录的最小二乘拟合
- 批准号:
1702417 - 财政年份:2017
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Pa-231 and Th-230 in the Western North Atlantic: Disentangling the Effects of Boundary Scavenging and Ocean Circulation
北大西洋西部的 Pa-231 和 Th-230:解开边界清除和海洋环流的影响
- 批准号:
1556400 - 财政年份:2016
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Application of Transient Time Distributions to Ocean Radiocarbon Records for the Last Deglaciation
瞬态时间分布在末次冰消期海洋放射性碳记录中的应用
- 批准号:
1301907 - 财政年份:2013
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Kalman Filtering and Smoothing of Sediment Records from the Atlantic Ocean over the last 20 KYRS
过去 20 KYRS 大西洋沉积物记录的卡尔曼过滤和平滑
- 批准号:
1103395 - 财政年份:2011
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Testing a Role of Vertical Mixing in Abrupt Climate Change
测试垂直混合在气候突变中的作用
- 批准号:
0602230 - 财政年份:2006
- 资助金额:
$ 52.94万 - 项目类别:
Standard Grant
Inverse Modeling of the Glacial Ocean
冰川海洋的反演模拟
- 批准号:
0524927 - 财政年份:2005
- 资助金额:
$ 52.94万 - 项目类别:
Continuing Grant
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