Collaborative Research: Three-Dimensional Numerical Investigation of Density Currents
合作研究:密度流的三维数值研究
基本信息
- 批准号:0209304
- 负责人:
- 金额:$ 10万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2002
- 资助国家:美国
- 起止时间:2002-09-01 至 2006-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The oceanic thermohaline circulation is strongly affected by localizeddense-water formation in high-latitude oceans. Such dense water massesare released into the large-scale circulation in the form of ocean bottomdensity currents mostly from localized regions (e.g., Denmark Strait,Strait of Gibraltar for the Mediterranean overflow, Bab el Mandep Straitfor the Red Sea overflow). Because of the small space and time scalesrequired to resolve their dynamics, such density currents form the``bottle neck'' of the thermohaline circulation investigation. Despite theirimportance, we have a limited understanding of the dynamics of bottomdensity currents, and at present, the oceanic density currents are poorlyrepresented in global climate simulations. The main goal of this proposalis to enhance the understanding of the dynamics of ocean bottom densitycurrents from laboratory scale, to geophysical scale, through three-dimensional,nonhydrostatic numerical simulations. The investigators accomplish thisin three stages. First, benchmark a parallel high-order spectral elementNavier-Stokes solver, Nek5000, by reproducing existing laboratory resultsof bottom density currents by direct numerical simulations. Second,explore dynamics for which there are few or no laboratory results, inparticular dynamics of bottom density currents protruding into a stratifiedfluid, and in a rotating environment. Third, bridge the gap betweenlaboratory scale and geophysical scale by using large eddy simulations.Geophysical scale calculations are configured for the Red Sea overflow,and confirmed with data from the Red Sea Overflow Experiment. Variousmetrics are used to quantify density current dynamics.Variation of solar heating with latitude, and other factors, drive theso-called ``thermohaline'' circulation in the ocean, which is closelylinked to the role that the ocean plays in climate dynamics. This complexgeophysical problem, with its range of scales, physical, mathematical andcomputational constraints can only be approached through an orchestratedeffort involving cross-disciplinary expertise. The investigators conductphysically-guided numerical simulations, quantify dynamical behavior ofocean density currents, and describe the impact of density currents onthe climate. The investigators integrate this research project witheducation of three graduate students and contribute to the training ofUS technical workforce for the 21st century. This research projectenhances the scientific understanding of oceanic density currents, andhelps improve the representation of ocean density currents in globalclimate simulations and contribute to the climate change research.
海洋温盐环流受高纬海洋局部密水形成的强烈影响。这种密集的水团以海底密度流的形式被释放到大尺度环流中,大部分来自局部区域(例如,丹麦海峡、直布罗陀海峡为地中海溢流口、曼德海峡为红海溢流口)。由于解决其动力学所需的空间和时间尺度很小,这种密度流形成了温盐环流调查的“瓶颈”。尽管它们的重要性,我们有一个有限的了解底层密度流的动力学,目前,海洋密度流是在全球气候模拟中表现不佳。该提案的主要目标是通过三维非流体静力数值模拟,从实验室尺度到地球物理尺度,加强对海底密度流动力学的理解。调查人员分三个阶段完成这项工作。首先,基准并行高阶谱元素Navier-Stokes求解器,Nek 5000,通过复制现有的实验室结果的底部密度流的直接数值模拟。第二,探索动力学,有很少或没有实验室结果,特别是底层密度流的动力学突出到分层流体,并在旋转环境。第三,通过大涡模拟弥合实验室尺度和地球物理尺度之间的差距。密度流动力学的量化使用了各种度量标准。太阳加热随纬度和其他因素的变化,驱动了海洋中所谓的“温盐”环流,这与海洋在气候动力学中所扮演的角色密切相关。这个复杂的地球物理问题,其范围的规模,物理,数学和计算的限制,只能通过一个协调的deffort涉及跨学科的专业知识来处理。研究人员进行物理引导的数值模拟,量化海洋密度流的动力学行为,并描述密度流对气候的影响。研究人员将这一研究项目与三名研究生的教育结合起来,为21世纪美国技术劳动力的培训做出贡献。该研究项目的开展有助于加深对海洋密度流的科学认识,提高海洋密度流在全球气候模拟中的代表性,为气候变化研究做出贡献。
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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Paul Fischer其他文献
A Time-Relaxation Reduced Order Model for the Turbulent Channel Flow
湍流通道流的时间松弛降阶模型
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Ping;Paul Fischer;T. Iliescu - 通讯作者:
T. Iliescu
Modification of Kv4.2 Channel Complexes by the Diphenylurea Compound NS5806
- DOI:
10.1016/j.bpj.2011.11.2912 - 发表时间:
2012-01-31 - 期刊:
- 影响因子:
- 作者:
Katrin Witzel;Regina Westermeier;Paul Fischer;Robert Bähring - 通讯作者:
Robert Bähring
Plasmacytoid dendritic cell interaction with HIV-infected T cells: Live cell nibbling vs cell–cell fusion
- DOI:
10.1016/j.cyto.2009.07.214 - 发表时间:
2009-10-01 - 期刊:
- 影响因子:
- 作者:
Evan S. Jacobs;Thaddeus C. George;Sukhwinder Singh;Richard Wnek;Paul Fischer;Shila K. Nordone;Gregg A. Dean;Patricia Fitzgerald-Bocarsly - 通讯作者:
Patricia Fitzgerald-Bocarsly
Post-release survival and prolonged sublethal effects of capture and barotrauma on deep-dwelling rockfishes (genus Sebastes): implications for fish management and conservation
捕获和气压伤对深海石斑鱼(Sebastes 属)的释放后生存和长期亚致死影响:对鱼类管理和保护的影响
- DOI:
10.1093/icesjms/fsab188 - 发表时间:
2021 - 期刊:
- 影响因子:3.3
- 作者:
N. Wegner;Elan J. Portner;Drew T. Nguyen;L. Bellquist;A. Nosal;A. Pribyl;K. Stierhoff;Paul Fischer;Ken Franke;R. Vetter;P. Hastings;B. Semmens;J. Hyde - 通讯作者:
J. Hyde
Rhodopsin activation involves an ensemble of conformational substates
- DOI:
10.1016/j.bpj.2021.11.2308 - 发表时间:
2022-02-11 - 期刊:
- 影响因子:
- 作者:
Andrey V. Struts;Eglof Ritter;Paul Fischer;Blake Mertz;Franz Bartl;Michael F. Brown - 通讯作者:
Michael F. Brown
Paul Fischer的其他文献
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{{ truncateString('Paul Fischer', 18)}}的其他基金
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- 批准号:
1954883 - 财政年份:2020
- 资助金额:
$ 10万 - 项目类别:
Standard Grant
RUI: An Examination of the Utility of Tris(phosphino)borates as Supporting Ligands for Rhenium(I) Dihapto-Arene Complexes
RUI:三(膦基)硼酸盐作为铼(I)二羟基芳烃配合物支持配体的实用性检验
- 批准号:
1464515 - 财政年份:2015
- 资助金额:
$ 10万 - 项目类别:
Standard Grant
RUI: Synthesis and Reactivity of Coordinatively Unsaturated Zwitterionic Half-Sandwich Group VIII Metal Complexes
RUI:配位不饱和两性离子半夹心第VIII族金属配合物的合成和反应活性
- 批准号:
1011800 - 财政年份:2010
- 资助金额:
$ 10万 - 项目类别:
Standard Grant
MRI: Acquisition of a 400 MHz NMR Spectrometer to Facilitate Research and Undergraduate Research Training
MRI:购买 400 MHz NMR 波谱仪以促进研究和本科生研究培训
- 批准号:
1039655 - 财政年份:2010
- 资助金额:
$ 10万 - 项目类别:
Standard Grant
CMG Collaborative Research: Ocean Modeling by Bridging Primitive and Boussinesq Equations
CMG 合作研究:通过连接原始方程和 Boussinesq 方程进行海洋建模
- 批准号:
1025359 - 财政年份:2010
- 资助金额:
$ 10万 - 项目类别:
Standard Grant
CMG Collaborative Research: A New Modeling Framework for Nonhydrostatic Simulations of Small-Scale Oceanic Processes
CMG 协作研究:小规模海洋过程非静水力模拟的新建模框架
- 批准号:
0620541 - 财政年份:2006
- 资助金额:
$ 10万 - 项目类别:
Standard Grant
Parallel Algorithms for General Geometry Navier-Stokes Calculations
一般几何纳维-斯托克斯计算的并行算法
- 批准号:
9405403 - 财政年份:1994
- 资助金额:
$ 10万 - 项目类别:
Continuing Grant
Parallel Spectral Element Methods for Viscous Flow Problems in General Domains
一般域粘性流问题的并行谱元方法
- 批准号:
9107674 - 财政年份:1991
- 资助金额:
$ 10万 - 项目类别:
Standard Grant
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