Impacts of Arctic freshwater export on the subpolar North Atlantic Ocean circulation

北极淡水输出对副极地北大西洋环流的影响

• 批准号: 2242033
• 负责人: Thomas Haine
• 金额: $ 46.64万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-03-15 至 2026-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2242033&HistoricalAwards=false
• 关键词: Impacts; Arctic; freshwater; export; subpolar

This study seeks to understand how the melting of Arctic ice and extra Arctic precipitation can influence the ocean currents in the North Atlantic. The study also asks how much of the Arctic meltwater and precipitation can be attributed to humans (anthropogenic influence)? The project will use verified and tested ocean models to determine the fate of Arctic water and the sources of unusually fresh water in the subpolar North Atlantic. Arctic waters will be tracked with several novel approaches, including artificial intelligence. For broader impacts, the project will provide understanding on the changes in the Arctic attributable to humans and their impact on the North Atlantic currents. These changes should influence global climate through the weakening of the climate-related Atlantic Meridional Overturning Circulation. Moreover, the project will support one graduate student and undergraduate students in research experiences. Results will be disseminated through typical academic activities and outreach to the general public.This study seeks to observe, understand and anticipate the export, propagation, and impacts of Arctic-derived fresh water on the subpolar North Atlantic. The study will identify the timing and character of the Arctic anthropogenic freshening signal in the subpolar North Atlantic through specific activities related to a) the fates of Arctic freshwater anomalies, b) the sources of subpolar North Atlantic freshwater anomalies, and c) preparations for the impacts of Arctic freshwater export on the subpolar North Atlantic. Novel tools will be applied for Eulerian anomaly tracking and Lagrangian trajectory analysis to outputs from model state estimates (ECCO, ASTE), reanalysis (ORAS5), forced high-resolution ocean model (LLC4320), and coupled projections (CESM2 LENS). For broader impacts, the project will provide understanding on the Arctic anthropogenic freshening and its impact on the subpolar North Atlantic, which influences global climate through the buoyancy-forced weakening of the Atlantic Meridional Overturning Circulation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项研究试图了解北极冰和额外的北极降水如何影响北大西洋的洋流。该研究还询问多少北极融化和降水可以归因于人类（人为影响）？ 该项目将使用经过验证和测试的海洋模型来确定北大西洋亚北大西洋中北极水的命运和异常淡水的来源。北极水域将采用几种新颖的方法，包括人工智能。对于更广泛的影响，该项目将对北极的变化及其对北大西洋潮流的影响提供理解。这些变化应通过削弱与气候相关的大西洋流通循环的削弱来影响全球气候。此外，该项目将支持一名研究生和本科生研究经验。结果将通过典型的学术活动和向公众推广来传播。这项研究旨在观察，理解和预测北极淡水在北大西洋亚极点对北极淡水的出口，传播和影响。该研究将通过与a）北极北大西洋亚大西洋北极北大大西洋中北极人为鲜明信号的时机和特征，b）北极淡水异常的命运，b）北大西洋淡水淡水异常的来源，以及c）为北方淡淡的北方北方北极北方的北部北部淡水量的影响。新工具将用于欧拉异常跟踪和拉格朗日轨迹分析，以从模型状态估计值（ECCO，ASTE），重新分析（ORAS5），强制高分辨率海洋模型（LLC4320）和耦合投影（CESM2镜头）中使用。对于更广泛的影响，该项目将提供对北极人为新鲜的新鲜度及其对北大西洋亚第极的影响的理解，该奖项通过浮力削弱大西洋子午的翻转循环影响了全球气候，这项奖项反映了NSF的法定任务，并通过评估了基金会的范围，并通过评估了基金会的范围。

项目成果

Seaduck: A python package for Eulerian and Lagrangianinterpolation on ocean datasets

Seaduck：用于海洋数据集欧拉和拉格朗日插值的 python 包

• DOI: 10.21105/joss.05967
• 发表时间: 2023
• 期刊: Journal of Open Source Software
• 作者: Jiang, Wenrui;Haine, Thomas W.;Almansi, Mattia
• 通讯作者: Almansi, Mattia

Polar Fresh Water in a Changing Global Climate: Linking Arctic and Southern Ocean Processes

全球气候变化中的极地淡水：连接北冰洋和南大洋过程

• DOI: 10.1175/bams-d-23-0046.1
• 发表时间: 2023
• 期刊: Bulletin of the American Meteorological Society
• 影响因子: 8
• 作者: Rabe, Benjamin;Martin, Torge;Solomon, Amy;Assmann, Karen M.;Biddle, Louise C.;Haine, Thomas;Hattermann, Tore;Haumann, F. Alexander;Jahn, Alexandra;Karpouzoglou, Theodoros
• 通讯作者: Karpouzoglou, Theodoros

A Review of Arctic–Subarctic Ocean Linkages: Past Changes, Mechanisms, and Future Projections

北极与亚北极海洋联系回顾：过去的变化、机制和未来预测

• DOI: 10.34133/olar.0013
• 发表时间: 2023
• 期刊: Ocean-Land-Atmosphere Research
• 作者: Wang, Qiang;Shu, Qi;Wang, Shizhu;Beszczynska-Moeller, Agnieszka;Danilov, Sergey;Steur, Laura;Haine, Thomas W.;Karcher, Michael;Lee, Craig M.;Myers, Paul G.
• 通讯作者: Myers, Paul G.