Heinrich Event Iceberg Flux, Melting, and Ocean Circulation in the North Atlantic
海因里希事件北大西洋冰山通量、融化和海洋环流
基本信息
- 批准号:1635019
- 负责人:
- 金额:$ 51.21万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2016
- 资助国家:美国
- 起止时间:2016-09-01 至 2020-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project generally aims to generate high-resolution data on a suite of deep-sea sediment cores from the North Atlantic Ocean and to conduct a comparison of the results with conceptual and computer models for the episodic production of major iceberg discharges. The researchers aim to produce a spatially systematic dataset of the concentration, provenance and flux of ice-rafted debris (IRD), derived from the North American Laurentide Ice Sheet (LIS) in an array of sites extending from west to east across the subpolar ocean, and south to the subtropics. These data will be used to test hypotheses regarding the genesis and subsequent distribution of melting icebergs associated with the Heinrich events of the last glaciation and to provide insights into the interactions of cryosphere and ocean circulation.The catastrophic iceberg discharge (Heinrich) events that punctuated the last ice age were among the largest known interactions of the Earth's cryosphere, ocean, and climate. Although there is continued debate about their causes and consequences, in at least a subset of the events, the evidence is consistent with their likely influence on the salinity and stability of the subpolar Atlantic, significant weakening of the Atlantic meridional overturning circulation (AMOC), cooling of the northern hemisphere, warming of the southern hemisphere, and shifts in the global hydrological cycle and large-scale atmospheric circulation and composition. Yet deposits associated with two of the six events originally identified during the last glaciation have very different sedimentary characteristics in the eastern subpolar North Atlantic, where they have most commonly been compared. This poses a problem for any single mechanism proposed to explain the events, requiring exceptions or contrasting explanations for different events.The Broader Impacts involve advancing understanding of the cryosphere, ocean, and climate system. The project will support an early career postdoctoral researcher and several undergraduates in the research. Research participants will take part in a research cruise to recover new sediments as part of a collaborative effort that is aligned with the goals of international efforts to understand the Coupled North Atlantic-Arctic System. The Broader Impacts also involve outreach through collaboration with for New York City public high school teachers and students. Members of the project will participate in the biennial Lamont-Doherty Earth Observatory Open House which draws thousands of visitors of all ages to the campus.
该项目的总体目标是生成关于北大西洋一套深海沉积物岩心的高分辨率数据,并将其结果与主要冰山排放的阶段性生成的概念模型和计算机模型进行比较。 研究人员的目标是产生一个空间系统的冰筏碎片(IRD)的浓度,来源和通量的数据集,这些碎片来自北美劳伦泰德冰盖(LIS),分布在从西向东延伸到亚极地海洋的一系列地点,以及南到亚热带地区。 这些数据将被用来检验与最后一次冰期的海因里希事件有关的冰山融化的成因和随后的分布假设,并提供对冰冻圈和海洋环流相互作用的见解。灾难性的冰山放电(海因里希)事件是地球冰冻圈,海洋和气候之间最大的已知相互作用。尽管关于其原因和后果仍有争议,但至少在一部分事件中,证据与它们对副极地大西洋的盐度和稳定性的可能影响是一致的,大西洋纬向翻转环流(AMOC)显着减弱,北方半球变冷,南半球变暖,以及全球水文循环和大规模大气环流和组成的变化。 然而,与最后一次冰期期间最初确定的六个事件中的两个事件有关的沉积物在东亚极地北大西洋具有非常不同的沉积特征,在那里它们最常被比较。这对任何单一的机制提出了一个问题来解释这些事件,需要对不同的事件进行例外或对比解释。更广泛的影响涉及促进对冰冻圈,海洋和气候系统的理解。 该项目将支持一名早期职业博士后研究员和几名本科生参与研究。研究参与者将参加一次研究巡航,以恢复新的沉积物,这是一项合作努力的一部分,该努力与国际努力的目标相一致,以了解耦合的北南极-北极系统。“更广泛的影响”还包括通过与纽约市公立高中教师和学生合作进行外联。该项目的成员将参加两年一度的拉蒙特-多尔蒂地球观测站开放日,该活动吸引了数千名各年龄段的游客来到校园。
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Evidence for Stable Holocene Basin‐Scale Overturning Circulation Despite Variable Currents Along the Deep Western Boundary of the North Atlantic Ocean
尽管北大西洋西部深部边界的洋流变化,全新世盆地稳定的证据——规模翻转环流
- DOI:10.1029/2018gl080187
- 发表时间:2018
- 期刊:
- 影响因子:5.2
- 作者:Hoffmann, Sharon S.;McManus, Jerry F.;Swank, Emerson
- 通讯作者:Swank, Emerson
The biogeochemical impact of glacial meltwater from Southwest Greenland
- DOI:10.1016/j.pocean.2019.102126
- 发表时间:2019-09-01
- 期刊:
- 影响因子:4.1
- 作者:Hendry, Katharine R.;Huvenne, Veerle A. I.;Woodward, E. Malcolm S.
- 通讯作者:Woodward, E. Malcolm S.
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Jerry McManus其他文献
Past abrupt changes, tipping points and cascading impacts in the Earth system
过去地球系统中的突然变化、临界点和连锁影响
- DOI:
10.1038/s41561-021-00790-5 - 发表时间:
2021-07-29 - 期刊:
- 影响因子:16.100
- 作者:
Victor Brovkin;Edward Brook;John W. Williams;Sebastian Bathiany;Timothy M. Lenton;Michael Barton;Robert M. DeConto;Jonathan F. Donges;Andrey Ganopolski;Jerry McManus;Summer Praetorius;Anne de Vernal;Ayako Abe-Ouchi;Hai Cheng;Martin Claussen;Michel Crucifix;Gilberto Gallopín;Virginia Iglesias;Darrell S. Kaufman;Thomas Kleinen;Fabrice Lambert;Sander van der Leeuw;Hannah Liddy;Marie-France Loutre;David McGee;Kira Rehfeld;Rachael Rhodes;Alistair W. R. Seddon;Martin H. Trauth;Lilian Vanderveken;Zicheng Yu - 通讯作者:
Zicheng Yu
Jerry McManus的其他文献
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{{ truncateString('Jerry McManus', 18)}}的其他基金
COLLABORATIVE RESEARCH: Early Career Coring Principal Investigator Training Cruise
合作研究:早期职业取芯首席研究员培训巡游
- 批准号:
2013862 - 财政年份:2020
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
Reconstructing the paleo-budget of 231Protactinium in the North Pacific
重建北太平洋 231 镤的古预算
- 批准号:
1835997 - 财政年份:2018
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
P2C2: Collaborative Research: Dust Deposition, Paleo-Export Production, and Migration of the (ITCZ) Through the Last Glacial Cycle in the West-Central Pacific (Line Islands)
P2C2:合作研究:中西部太平洋(莱恩群岛)末次冰河周期期间的灰尘沉积、古出口生产和(ITCZ)迁移
- 批准号:
1502889 - 财政年份:2015
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
Collaborative Research: Testing the Reliability of Paleo Ventilation Estimates
合作研究:测试古通风估计的可靠性
- 批准号:
1029936 - 财政年份:2010
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
Collaborative Research: An Abyssal Circulation Type Section for the North Atlantic
合作研究:北大西洋深海环流类型剖面
- 批准号:
0936496 - 财政年份:2009
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
Investigating the Role of Ocean Circulation in Climate Change During the Last Ice Age Using 231Pa/230Th
使用 231Pa/230Th 研究末次冰河时期海洋环流在气候变化中的作用
- 批准号:
0937221 - 财政年份:2009
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
A depth transect of sedimentary 231Pa/230Th in the western Atlantic since the last ice age
末次冰期以来西大西洋沉积层 231Pa/230Th 深度横断面
- 批准号:
0902985 - 财政年份:2009
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
Collaborative Research: Th-230 as a Sediment Focusing Indicator: constraints from He-3 in Interplanetary Dust Particles
合作研究:Th-230 作为沉积物聚焦指标:行星际尘埃粒子中 He-3 的限制
- 批准号:
0840430 - 财政年份:2008
- 资助金额:
$ 51.21万 - 项目类别:
Continuing Grant
Collaborative Research: Th-230 as a Sediment Focusing Indicator: constraints from He-3 in Interplanetary Dust Particles
合作研究:Th-230 作为沉积物聚焦指标:行星际尘埃粒子中 He-3 的限制
- 批准号:
0550637 - 财政年份:2006
- 资助金额:
$ 51.21万 - 项目类别:
Continuing Grant
Investigating the Role of Ocean Circulation in Climate Change During the Last Ice Age Using 231Pa/230Th
使用 231Pa/230Th 研究末次冰河时期海洋环流在气候变化中的作用
- 批准号:
0602384 - 财政年份:2006
- 资助金额:
$ 51.21万 - 项目类别:
Standard Grant
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