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
基本信息
- 批准号:1103395
- 负责人:
- 金额:$ 43.74万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2011
- 资助国家:美国
- 起止时间:2011-06-01 至 2015-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Paleoclimatology is a rapidly evolving field, with a sustained production of records with improved accuracy and chronology. As the number of such records increases, the question of how to interpret them in the presence of a dynamical model has emerged. This work, led by a researcher at the Woods Hole Oceanographic Institution in Massachusetts, develops an inverse method for assimilating long time series of sea surface temperature and other oceanic properties, such as those generated from the analysis of sediment cores, into three-dimensional models of ocean circulation. The computational challenge posed by data assimilation over geologic time scales will be addressed by relying on a model with simplified dynamics and on a partitioned Kalman filter & smoother. The filter & smoother will be applied to drive the model with a collection of sediment records over the last 20,000 years from the North Atlantic Ocean. The movements of large-scale hydrographic fronts and the attendant circulation changes over this time interval will be estimated in a manner that is consistent with both sediment data and ocean dynamics, thereby allowing various paleoceanographic hypotheses to be tested. By estimating the time-dependent state of the North Atlantic Ocean over the last 20,000 years, the project will provide a perspective on ongoing changes in ocean circulation that are postulated from instrumental records. This project brings together an ocean modeler, a paleoceanographer, and two physical oceanographers to ensure a robust approach to the various aspects of the project. These participants include two collaborators from French institutions. Funding supports a graduate student and a post-doctoral scholar at the Woods Hole Oceanographic Institution.
古气候学是一个快速发展的领域,其记录的持续生产具有更高的准确性和年代顺序。随着此类记录数量的增加,出现了如何在动态模型存在的情况下解释它们的问题。这项工作由马萨诸塞州伍兹霍尔海洋研究所的一名研究人员领导,开发了一种反演方法,用于将长期海面温度序列和其他海洋特性(例如通过沉积物岩心分析生成的特性)同化到海洋环流的三维模型中。地质时间尺度上的数据同化带来的计算挑战将通过依赖具有简化动力学的模型以及分区卡尔曼滤波器和平滑器来解决。过滤器和平滑器将用于驱动模型,收集过去 20,000 年来北大西洋的沉积物记录。在此时间间隔内大规模水文锋面的运动和随之而来的环流变化将以与沉积物数据和海洋动力学一致的方式进行估计,从而可以测试各种古海洋学假设。通过估计过去 20,000 年北大西洋随时间变化的状态,该项目将提供根据仪器记录假设的海洋环流持续变化的视角。该项目汇集了一名海洋建模师、一名古海洋学家和两名物理海洋学家,以确保对该项目的各个方面采取稳健的方法。这些参与者包括来自法国机构的两名合作者。资金支持伍兹霍尔海洋研究所的一名研究生和一名博士后学者。
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:
$ 43.74万 - 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:
$ 43.74万 - 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:
$ 43.74万 - 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:
$ 43.74万 - 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:
$ 43.74万 - 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:
$ 43.74万 - 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:
$ 43.74万 - 项目类别:
Standard Grant
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
- 批准号:
1232578 - 财政年份:2012
- 资助金额:
$ 43.74万 - 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:
$ 43.74万 - 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:
$ 43.74万 - 项目类别:
Continuing Grant
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