Collaborative Research: Three-dimensional structure of Arctic tides and near-inertial oscillations, and their role in changing the Arctic Ocean and ice pack
合作研究:北冰洋潮汐和近惯性振荡的三维结构及其在改变北冰洋和冰层中的作用
基本信息
- 批准号:1708289
- 负责人:
- 金额:$ 29.79万
- 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 2021-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The Arctic Ocean is undergoing rapid change. Implications are significant for strategic and tactical military planning; regional, and perhaps global, climate; northern ecosystems and cultures; and economic interests. Climate models qualitatively agree that these changes will persist. Projections of when specific benchmarks, such as an ice-free summer Arctic Ocean, will be reached vary by several decades. Reducing uncertainty in Arctic change projections is an important task. This project identifies tides and near-inertial (NI) waves, with periods of approximately 12 hours, as the major components of Arctic ocean velocity fields, mixing rates and ice dynamics that are not presently represented in global coupled climate models. The project will provide the Arctic community with a database of time-dependent tidal and NI energy in select current meter records. Also, it will provide a carefully-validated, high-resolution, fully-forced Arctic coupled ocean/sea-ice model (OIM) for quantifying the effects of high-frequency (HF) processes on seasonal and longer-term variability of the Arctic Ocean and its ice pack. The project will contribute to STEM workforce development through support for the training of a post-doctoral associate and a graduate student, and through support for two early-career scientists. K-12 outreach will be enabled through in-person and webinar programs at schools in AK, TX, WA and OR. A public-friendly video with visualization of model results will be prepared and distributed to schools and other communities including coastal Alaskan villages, and highlighted on the project website.Motivated by observations of strong HF ocean currents and ice drift velocities that are very sensitive tochanges in sea-ice state, sparse measurements of HF time series of ocean mixing and ice deformation,and coarse-grid models with parameterized tide forcing, this project tests the following hypothesis: "Energetic, HF processes, including tides and wind-generated NI waves, are critical contributors to the seasonal cycle and longer-term trends of the Arctic's 3-D hydrography and circulation, sea-ice characteristics, and exchanges of heat, freshwater and momentum between the atmosphere, ocean and sea-ice." The program's specific goals are to map the time-dependent distribution of HF energy in the ocean and ice throughout the Arctic; assess the role of HF processes in the Arctic ice and upper ocean; develop understanding of the HF processes coupling the sea ice, ocean, and atmosphere; and quantify the effect of HF processes on seasonal cycles and longer-term trends. Taking advantage of rapidly growing databases for ocean and sea-ice velocities, and improvements in resolution and physical realism of OIMs, it integrates analyses of tidal and NI signals in select Arctic ocean moorings and sea-ice drift data, validation of a high resolution (~2 km x 106 vertical levels) pan-Arctic OIM with full atmospheric and tidal forcing, and comparison of a suite of model simulations with different forcing to identify dominant HF processes. Simulations with simplified forcing (e.g., removing tides and low-pass filtering the winds to reduce NI forcing) will identify key factors involved in HF influence on ocean and sea-ice state on seasonal and longer time scales. Focus areas include the effect of HF processes on ice formation and dispersion of river freshwater and heat fluxes in shelf seas, on mixing of Atlantic- and Pacific-sourced waters along the Arctic continental slopes, on feedbacks between ocean and sea-ice HF processes, and on the seasonal cycle of atmospheric heat exchange with the ocean and sea ice.
北冰洋正在经历快速的变化。这对战略和战术军事规划、区域乃至全球气候、北方生态系统和文化以及经济利益都有重大影响。气候模型在定性上一致认为,这些变化将持续下去。至于何时达到具体的基准,如夏季北冰洋无冰,预测的结果相差几十年。减少北极变化预测的不确定性是一项重要任务。该项目确定潮汐和周期约为12小时的近惯性波是北冰洋速度场、混合率和冰动力学的主要组成部分,目前全球耦合气候模型中没有这些组成部分。该项目将为北极社区提供一个数据库,其中包含选定海流计记录中随时间变化的潮汐和中性和负能量。此外,它还将提供一个经过仔细验证的、高分辨率的、完全强迫的北极海洋/海冰耦合模型(OIM),用于量化高频(HF)过程对北冰洋及其冰层的季节性和长期变化的影响。该项目将通过支持一名博士后助理和一名研究生的培训,并通过支持两名早期职业科学家,为STEM劳动力的发展做出贡献。K-12外展将通过在AK,TX,WA和OR的学校的面对面和网络研讨会计划实现。将制作一个便于公众观看的视频,将模型结果可视化,分发给学校和其他社区,包括阿拉斯加沿海村庄,并在项目网站上突出显示。由于观测到对海冰状态变化非常敏感的强高频洋流和冰漂移速度,海洋混合和冰变形的高频时间序列的稀疏测量,以及具有参数化潮汐强迫的粗网格模型,该项目检验了以下假设:“高能高频过程,包括潮汐和风产生的NI波,是北极三维水文和环流、海冰特征以及大气、海洋和海冰之间热量、淡水和动量交换的季节性周期和长期趋势的关键因素。“该计划的具体目标是绘制整个北极海洋和冰中HF能量随时间变化的分布图;评估HF过程在北极冰和上层海洋中的作用;了解HF过程耦合海冰,海洋和大气;量化HF过程对季节周期和长期趋势的影响。利用海洋和海冰速度数据库的快速增长,以及OIM分辨率和物理真实性的提高,它整合了对选定的北冰洋系泊和海冰漂移数据中潮汐和NI信号的分析,验证了高分辨率(~2 km x 106垂直高度)具有完整大气和潮汐作用力的泛北极OIM,和比较一套模式模拟与不同的强迫,以确定占主导地位的HF过程。简化强迫的模拟(例如,消除潮汐和低通滤波风,以减少NI强迫)将确定关键因素涉及HF影响海洋和海冰状态的季节和较长的时间尺度。重点领域包括HF过程对冰的形成和河流淡水的分散以及陆架海的热通量的影响,对北极大陆斜坡沿着大西洋和太平洋来源的沃茨的混合的影响,对海洋和海冰HF过程之间的反馈的影响,以及对大气与海洋和海冰进行热交换的季节性循环的影响。
项目成果
期刊论文数量(1)
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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An Nguyen其他文献
HUMAN GAIT ANALYSIS USING HYBRID CONVOLUTIONAL NEURAL NETWORKS
使用混合卷积神经网络进行人体步态分析
- DOI:
10.15625/1813-9663/18067 - 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Khang Nguyen;Viet V. Nguyen;Nga Mai;An H. Nguyen;An Nguyen - 通讯作者:
An Nguyen
The Optimal Initial Dose and Route of Naloxone Administration for Successful Opioid Reversal: A Systematic Literature Review
纳洛酮成功逆转阿片类药物的最佳初始剂量和给药途径:系统文献综述
- DOI:
10.7759/cureus.52671 - 发表时间:
2024 - 期刊:
- 影响因子:0
- 作者:
Rida Aziz;Lan Nguyen;Washika Ruhani;An Nguyen;Brian Zachariah - 通讯作者:
Brian Zachariah
Hemolytic anemia following rasburicase administration: a review of published reports.
拉布立酶给药后的溶血性贫血:已发表报告的回顾。
- DOI:
- 发表时间:
2014 - 期刊:
- 影响因子:0
- 作者:
An Nguyen;G. Ness - 通讯作者:
G. Ness
EXTERNAL CAVITY SEMICONDUCTOR LASERS
- DOI:
- 发表时间:
1999 - 期刊:
- 影响因子:0
- 作者:
An Nguyen - 通讯作者:
An Nguyen
Mutations in LNPK, Encoding the Endoplasmic Reticulum Junction Stabilizer Lunapark, Cause a Recessive Neurodevelopmental Syndrome
- DOI:
10.1016/j.ajhg.2018.06.011 - 发表时间:
2018-08-02 - 期刊:
- 影响因子:9.8
- 作者:
Breuss, Martin W.;An Nguyen;Gleeson, Joseph G. - 通讯作者:
Gleeson, Joseph G.
An Nguyen的其他文献
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{{ truncateString('An Nguyen', 18)}}的其他基金
Drivers and Impacts of North Atlantic freshwater and heat fluxes unsettling modern-day climate (DIMSUM)
北大西洋淡水和热通量扰乱现代气候的驱动因素和影响 (DIMSUM)
- 批准号:
2401413 - 财政年份:2023
- 资助金额:
$ 29.79万 - 项目类别:
Standard Grant
Collaborative Research: Research Networking Activities in Support of Sustained Coordinated Observations of Arctic Change
合作研究:支持北极变化持续协调观测的研究网络活动
- 批准号:
1936579 - 财政年份:2020
- 资助金额:
$ 29.79万 - 项目类别:
Continuing Grant
COJO for COVID recovery: Solutions-focused constructive journalism as a pandemic exit strategy for local/regional UK communities
COJO 促进新冠病毒恢复:以解决方案为中心的建设性新闻作为英国当地/区域社区的流行病退出策略
- 批准号:
AH/V015168/1 - 财政年份:2020
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Research Grant
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合作研究:AccelNet:通过国际合作加速格陵兰海洋边缘的发现
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2020387 - 财政年份:2020
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- 批准号:
1603903 - 财政年份:2016
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Arctic Floats: A Pilot Effort for Arctic Argo
北极浮标:Argo Argo 的试点工作
- 批准号:
1643339 - 财政年份:2016
- 资助金额:
$ 29.79万 - 项目类别:
Standard Grant
Collaborative Research: An eddy-permitting Arctic & Sub-Polar State Estimate for climate research
合作研究:允许涡流的北极
- 批准号:
1118473 - 财政年份:2011
- 资助金额:
$ 29.79万 - 项目类别:
Standard Grant
Collaborative Research: An eddy-permitting Arctic & Sub-Polar State Estimate for climate research
合作研究:允许涡流的北极
- 批准号:
1023089 - 财政年份:2010
- 资助金额:
$ 29.79万 - 项目类别:
Standard Grant
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