Collaborative Research: Deep Circulation over the Flanks of a Mid-Ocean Ridge

合作研究:大洋中脊两侧的深层环流

基本信息

  • 批准号:
    1736109
  • 负责人:
  • 金额:
    $ 50.01万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2017
  • 资助国家:
    美国
  • 起止时间:
    2017-09-01 至 2023-08-31
  • 项目状态:
    已结题

项目摘要

The deep ocean, below the crests of the mid ocean ridges, is a major global reservoir for heat and carbon dioxide, and thus plays an important role in governing the earth's climate. These properties enter the abyssal ocean in plumes of dense water formed at the surface near the poles, and are exchanged throughout the ocean by turbulent diffusion with overlying layers. Deep water flows back toward the poles at lower densities than the plume water. To close the circulation, buoyancy of bottom water must be increased by turbulent diffusion of buoyancy downward, assisted by geothermal heating. Turbulent diffusion has been found to be strongly enhanced over regions of rough topography, but to decrease strongly with height above the bottom. This results, paradoxically, in buoyancy loss in most of the deep ocean, but recent theoretical work suggests that this loss is more than compensated globally by buoyancy gain in a bottom layer and upward flow along the sides of the basins. An example of the processes involved was suggested by an experiment conducted in the Brazil Basin in the 1990's. Turbulence profiles and the evolution of a tracer released above a fracture zone canyon on the flanks of the Mid-Atlantic Ridge showed increased diffusion toward the bottom. Furthermore, though the main tracer patch, which was aloft of most topography, moved poleward and westward, much of the deeper tracer appeared to be drawn eastward and into the canyon, suggesting vigorous mixing in that area. We propose to simulate the evolution of the tracer patch at 2.5-km resolution to understand and quantify the general circulation and lateral eddy stirring, and especially to test measurement-based hypotheses about the distribution of turbulent buoyancy fluxes. Since measurements suggest that buoyancy fluxes in the region are dominated by processes at sills across the canyons, it is necessary to simulate the flow in the region of a well-measured sill at high (250-m) resolution to test hypotheses of how the turbulent buoyancy flux is distributed there in detail. The kind of forcing and bathymetry to be studied in this project typify the flanks of the mid-ocean ridge throughout the Atlantic and much of the Indian and Pacific Oceans. This study will be relevant to a large fraction of the area of the ocean, and will improve our current understanding of the return path of the deep overturning circulation and its role in governing the earth's climate. Generation of turbulence over rough topography and propagation into the interior are complex processes, with many potentially relevant mechanisms of creating velocity shear and large amplitude displacements that provide the ultimate forcing: e.g. internal tides; lee waves; sill flows; and even wind-generated inertial waves. Recent work suggests that this turbulence drives strong upwelling along the sloping ocean topography. The observations collected as part of field programs in the Brazil Basin will provide key information to test the hypothesis. Numerical models will be run to help the investigators interpret the observations and test their theoretical ideas. The main goal is to bring together in a unified picture the numerous Brazil Basin observations, none of which by itself paints a full picture of the abyssal circulation in the Brazil Basin. For example, the sampling of the tracer during Brazil Basin Tracer Release Experiment (BBTRE) and subsequent campaigns was by necessity incomplete. The vertical profiles of microstructure were limited in their spatial and temporal coverage. Mooring velocities were collected at only a few locations. Float data offered a glimpse of the trajectories of a few water parcels. Two sets of numerical simulations will be used in this study. A 2.5-km resolution simulation centered over the region sampled during BBTRE configured to study the dispersion of the tracer, and a 250-m resolution patch embedded in the larger simulation, centered on the BBTRE Canyon to study in detail the diapycnal buoyancy flux and upwelling which appear to be largest along the canyon-and-hills bathymetry.
深海位于大洋中脊之下,是全球主要的热量和二氧化碳储存库,因此在控制地球气候方面发挥着重要作用。这些特性以在两极附近的表面形成的稠密水羽流的形式进入深海,并通过与上层的湍流扩散在整个海洋中进行交换。深水以比羽流水更低的密度向两极回流。为了关闭循环,必须通过浮力向下的湍流扩散以及地热加热来增加底水的浮力。湍流扩散在地形起伏较大的区域得到了强烈的增强,但随着底部以上高度的增加而明显减弱。自相矛盾的是,这导致了大部分深海浮力的损失,但最近的理论研究表明,这种损失在全球范围内得到了补偿,因为底层浮力的增加和盆地两侧的向上流动。上世纪90年代S在巴西盆地进行的一项实验给出了这一过程的一个例子。在中大西洋海脊两侧的一个断裂带峡谷上方释放的湍流剖面和示踪剂的演变表明,向底部的扩散增加。此外,尽管位于大多数地形高处的主要示踪剂斑块向极地和向西移动,但大部分较深的示踪物似乎向东吸引,进入峡谷,这表明该地区存在强烈的混合。我们建议在2.5公里分辨率下模拟示踪斑块的演化,以了解和量化大气环流和侧向涡动,特别是检验基于测量的关于湍流浮力通量分布的假设。由于测量表明该区域的浮力通量主要由跨越峡谷的基准处的过程控制,因此有必要在高分辨率(250米)下模拟测量良好的基准区的流动,以检验关于湍流浮力通量如何在那里分布的假设。在这个项目中要研究的那种强迫和水深测量在整个大西洋以及印度洋和太平洋的大部分大洋中脊的侧翼都是典型的。这项研究将与很大一部分海洋面积有关,并将改善我们目前对深部颠覆环流的返回路径及其在控制地球气候中的作用的理解。在崎岖的地形上产生湍流并传播到内陆是复杂的过程,有许多潜在的相关机制来产生速度切变和大幅度位移,从而提供最终的强迫:例如,内潮、背风波、基底流,甚至风生的惯性波。最近的研究表明,这种湍流推动了沿倾斜的海洋地形的强烈上升流。作为巴西盆地实地考察项目的一部分,收集的观测数据将为检验这一假说提供关键信息。将运行数值模型来帮助调查人员解释观察结果并测试他们的理论想法。主要目标是将众多的巴西盆地观测结果汇集在一张统一的图片中,其中任何一项本身都不能全面描述巴西盆地的深海环流。例如,在巴西盆地示踪剂释放试验(BBTRE)和随后的活动中,对示踪剂的采样必然是不完整的。微结构的垂直剖面在空间和时间覆盖范围上都是有限的。只在少数几个地点采集到系泊速度。浮标数据让我们得以一窥几个水团的轨迹。本研究将使用两组数值模拟。一个2.5公里分辨率的模拟以BBTRE期间采样的区域为中心,用于研究示踪剂的弥散,而一个250米分辨率的斑块嵌入在以BBTRE峡谷为中心的更大的模拟中,以详细研究沿峡谷和丘陵的水深测量似乎最大的昼夜浮力通量和上升流。

项目成果

期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
100 Years of the Ocean General Circulation
  • DOI:
    10.1175/amsmonographs-d-18-0002.1
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    0
  • 作者:
    C. Wunsch;R. Ferrari
  • 通讯作者:
    C. Wunsch;R. Ferrari
Diapycnal displacement, diffusion, and distortion of tracers in the ocean
海洋中示踪剂的斜轴位移、扩散和扭曲
  • DOI:
    10.1175/jpo-d-22-0010.1
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    3.5
  • 作者:
    Drake, Henri F.;Ruan, Xiaozhou;Ferrari, Raffaele
  • 通讯作者:
    Ferrari, Raffaele
Middepth Recipes
中深度食谱
  • DOI:
    10.1175/jpo-d-22-0225.1
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    3.5
  • 作者:
    Rogers, Mason;Ferrari, Raffaele;Nadeau, Louis-Philippe
  • 通讯作者:
    Nadeau, Louis-Philippe
Dynamics of an Abyssal Circulation Driven by Bottom-Intensified Mixing on Slopes
  • DOI:
    10.1175/jpo-d-17-0125.1
  • 发表时间:
    2018-06
  • 期刊:
  • 影响因子:
    3.5
  • 作者:
    J. Callies;R. Ferrari
  • 通讯作者:
    J. Callies;R. Ferrari
Squeeze Dispersion and the Effective Diapycnal Diffusivity of Oceanic Tracers
  • DOI:
    10.1029/2019gl082458
  • 发表时间:
    2019-05
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
    G. Wagner;G. Flierl;R. Ferrari;Gunnar Voet;G. Carter;M. Alford;J. Girton
  • 通讯作者:
    G. Wagner;G. Flierl;R. Ferrari;Gunnar Voet;G. Carter;M. Alford;J. Girton
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Raffaele Ferrari其他文献

Genome-wide analyses reveal a potential role for the MAPT, MOBP, and APOE loci in sporadic frontotemporal dementia.
全基因组分析揭示了 MAPT、MOBP 和 APOE 位点在散发性额颞叶痴呆中的潜在作用。
  • DOI:
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    9.8
  • 作者:
    Claudia Manzoni;D. Kia;Raffaele Ferrari;G. Leonenko;Beatrice Costa;Valentina Saba;Edwin Jabbari;M. Tan;D. Albani;V. Álvarez;Ignacio Alvarez;Ole A Andreassen;Antonella Angiolillo;A. Arighi;Matt Baker;L. Benussi;V. Bessi;G. Binetti;Daniel J. Blackburn;Mercè Boada;B. Boeve;S. Borrego;B. Borroni;G. Bråthen;W. Brooks;A. C. Bruni;P. Caroppo;S. Bandres;J. Clarimón;R. Colao;C. Cruchaga;Adrian Danek;Sterre C. M. de Boer;I. de Rojas;A. Di Costanzo;Dennis W. Dickson;J. Diehl‐Schmid;Carol Dobson;O. Dols;Aldo Donizetti;E. Dopper;Elisabetta Durante;C. Ferrari;G. Forloni;F. Frangipane;Laura Fratiglioni;M. Kramberger;Daniela Galimberti;Maurizio Gallucci;P. García;R. Ghidoni;G. Giaccone;Caroline Graff;N. Graff;Jordan Grafman;Glenda M Halliday;Dena G. Hernandez;L. Hjermind;John R. Hodges;G. Holloway;E. Huey;I. Illán;K. Josephs;D. Knopman;M. Kristiansen;John B. Kwok;I. Leber;H. Leonard;Ilenia Libri;A. Lleó;Ian R. A. Mackenzie;G. Madhan;R. Maletta;M. Marquié;A. Maver;M. Menéndez;Graziella Milan;Bruce L. Miller;Christopher M. Morris;Huw R. Morris;B. Nacmias;J. Newton;Jørgen E. Nielsen;Christer Nilsson;V. Novelli;Alessandro Padovani;S. Pal;F. Pasquier;P. Pástor;Robert Perneczky;B. Peterlin;R. C. Petersen;Olivier Piguet;Y. Pijnenburg;A. Puca;R. Rademakers;I. Rainero;L. Reus;A. Richardson;Matthias Riemenschneider;E. Rogaeva;Boris Rogelj;S. Rollinson;H. Rosen;G. Rossi;James B. Rowe;E. Rubino;Agustin Ruiz;Erika Salvi;R. Sánchez;S. Sando;A. Santillo;Jennifer A. Saxon;Johannes CM. Schlachetzki;S. Scholz;H. Seelaar;W. Seeley;M. Serpente;S. Sorbi;S. Sordon;Peter St. George;Jennifer C. Thompson;C. van Broeckhoven;V. V. Van Deerlin;S. J. van der Lee;J. V. van Swieten;Fabrizio Tagliavini;J. van der Zee;Arianna Veronesi;Emilia Vitale;M. L. Waldo;Jennifer S. Yokoyama;Mike A Nalls;P. Momeni;Andy Singleton;John Hardy;Valentina Escott
  • 通讯作者:
    Valentina Escott
Observations of diapycnal upwelling within a sloping submarine canyon
倾斜海底峡谷内垂向上升流的观测
  • DOI:
    10.1038/s41586-024-07411-2
  • 发表时间:
    2024-06-26
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    Bethan L. Wynne-Cattanach;Nicole Couto;Henri F. Drake;Raffaele Ferrari;Arnaud Le Boyer;Herlé Mercier;Marie-José Messias;Xiaozhou Ruan;Carl P. Spingys;Hans van Haren;Gunnar Voet;Kurt Polzin;Alberto C. Naveira Garabato;Matthew H. Alford
  • 通讯作者:
    Matthew H. Alford
Genome-wide analyses reveal a potential role for the emMAPT/em, emMOBP/em, and emAPOE/em loci in sporadic frontotemporal dementia
全基因组分析揭示了 emMAPT/em、emMOBP/em 和 emAPOE/em 位点在散发性额颞痴呆中的潜在作用
  • DOI:
    10.1016/j.ajhg.2024.05.017
  • 发表时间:
    2024-07-11
  • 期刊:
  • 影响因子:
    8.100
  • 作者:
    Claudia Manzoni;Demis A. Kia;Raffaele Ferrari;Ganna Leonenko;Beatrice Costa;Valentina Saba;Edwin Jabbari;Manuela MX. Tan;Diego Albani;Victoria Alvarez;Ignacio Alvarez;Ole A. Andreassen;Antonella Angiolillo;Andrea Arighi;Matt Baker;Luisa Benussi;Valentina Bessi;Giuliano Binetti;Daniel J. Blackburn;Merce Boada;Valentina Escott-Price
  • 通讯作者:
    Valentina Escott-Price
Direct Estimate of Lateral Eddy Diffusivity Upstream of the Drake Passage
德雷克海峡上游横向涡流扩散率的直接估计
  • DOI:
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Rosstulloch;Raffaele Ferrari;Oliver Jahn;A. Klocker;Jim Ledwell;John Marshall;Kevin Speer;Andrew Watson
  • 通讯作者:
    Andrew Watson
The evolving butterfly: Statistics in a changing attractor
不断进化的蝴蝶:不断变化的吸引子中的统计数据
  • DOI:
    10.1016/j.physd.2024.134107
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Gosha Geogdzhayev;Andre N. Souza;Raffaele Ferrari
  • 通讯作者:
    Raffaele Ferrari

Raffaele Ferrari的其他文献

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{{ truncateString('Raffaele Ferrari', 18)}}的其他基金

2019 Graduate Climate Conference; Woods Hole, Massachusetts; November 7-10, 2019
2019年研究生气候会议;
  • 批准号:
    1929918
  • 财政年份:
    2019
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
Collaborative Research: Bottom Boundary Layer Turbulent and Abyssal Recipes
合作研究:底部边界层湍流和深渊配方
  • 批准号:
    1756324
  • 财政年份:
    2018
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Continuing Grant
Collaborative Research: HDR: Data-Driven Earth System Modeling
合作研究:HDR:数据驱动的地球系统建模
  • 批准号:
    1835576
  • 财政年份:
    2018
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Continuing Grant
2017 Graduate Climate Conference; Woods Hole, Massachusetts; November 10-12, 2017
2017年研究生气候会议;
  • 批准号:
    1727575
  • 财政年份:
    2017
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
Collaborative Research: An Ocean Tale of Two Climates: Modern and Last Glacial Maximum
合作研究:两种气候的海洋故事:现代和末次盛冰期
  • 批准号:
    1536515
  • 财政年份:
    2015
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
2015 Graduate Climate Conference (GCC); Woods Hole, Massachusetts; November 6-8, 2015
2015年研究生气候会议(GCC);
  • 批准号:
    1542590
  • 财政年份:
    2015
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
Collaborative Research: Diagnosing Eddy mixing in DIMES
合作研究:诊断 DIMES 中的涡流混合
  • 批准号:
    1233832
  • 财政年份:
    2012
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
Collaborative Research: Forcing and the North Atlantic Spring Bloom
合作研究:强迫和北大西洋春季水华
  • 批准号:
    1155205
  • 财政年份:
    2012
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
2011 Graduate Climate Conference on Climate and Climate Change in an Array of Disciplines; Woods Hole, MA; October 28-30, 2011
2011 年气候与气候变化多个学科研究生气候会议;
  • 批准号:
    1146864
  • 财政年份:
    2011
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
CMG COLLABORATIVE RESEARCH: From internal waves to mixing in the ocean
CMG 合作研究:从内波到海洋中的混合
  • 批准号:
    1024198
  • 财政年份:
    2010
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant

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合作研究:地球深层和浅层挥发性循环之间联系的地球物理和地球化学调查
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    Standard Grant
Collaborative Research: Resolving the LGM ventilation age conundrum: New radiocarbon records from high sedimentation rate sites in the deep western Pacific
合作研究:解决LGM通风年龄难题:西太平洋深部高沉降率地点的新放射性碳记录
  • 批准号:
    2341425
  • 财政年份:
    2024
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Continuing Grant
Collaborative Research: OAC Core: CropDL - Scheduling and Checkpoint/Restart Support for Deep Learning Applications on HPC Clusters
合作研究:OAC 核心:CropDL - HPC 集群上深度学习应用的调度和检查点/重启支持
  • 批准号:
    2403089
  • 财政年份:
    2024
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
Collaborative Research: Geophysical and geochemical investigation of links between the deep and shallow volatile cycles of the Earth
合作研究:地球深层和浅层挥发性循环之间联系的地球物理和地球化学调查
  • 批准号:
    2333101
  • 财政年份:
    2024
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
Collaborative Research: FET: Medium:Compact and Energy-Efficient Compute-in-Memory Accelerator for Deep Learning Leveraging Ferroelectric Vertical NAND Memory
合作研究:FET:中型:紧凑且节能的内存计算加速器,用于利用铁电垂直 NAND 内存进行深度学习
  • 批准号:
    2312886
  • 财政年份:
    2023
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
Collaborative Research: RI: Medium: Principles for Optimization, Generalization, and Transferability via Deep Neural Collapse
合作研究:RI:中:通过深度神经崩溃实现优化、泛化和可迁移性的原理
  • 批准号:
    2312841
  • 财政年份:
    2023
  • 资助金额:
    $ 50.01万
  • 项目类别:
    Standard Grant
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