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Collaborative Research: Model Process Studies of Freshwater Accumulation and Release in the Beaufort Gyre of the Arctic Ocean

合作研究：北冰洋波弗特环流淡水积累和释放的模型过程研究

基本信息

批准号：
1603000
负责人：
Changsheng Chen
金额：
$ 38.14万
依托单位：
University of Massachusetts, Dartmouth
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-08-01 至 2021-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1603000&HistoricalAwards=false
关键词：
Collaborative Research Model Process Studies

项目摘要

The Beaufort Gyre is circulation pattern in the Arctic Ocean. Observations have documented that in 2003 to 2014, the Beaufort Gyre region accumulated more than 5000 km3 of liquid freshwater relative to the climatology of the 1970s. Recent results suggest that the Beaufort Gyre system may be entering a period of freshwater release. The release of so much freshwater to the sub-Arctic seas of the North Atlantic region has the potential to modify processes in this region, which is important for the climate system. This project will investigate how the Beaufort Gyre accumulates and releases freshwater and how this influences processes in the Arctic Ocean and in the sub-arctic seas of the North Atlantic. This project would contribute to STEM workforce development by providing support for the training of a graduate student. The project also would provide support to a young, female scientist during the formative years of her career. The project will continue and enhance a productive collaboration that the PI has established with Shanghai Ocean University (SHOU) and leverage computational resources in Shanghai. Additionally, it benefits from a collaboration between SHOU and the Norwegian research company Akvapan-niva AS, Norway, allowing access to field observations collected by this group. Outreach to the K-Gray community will be achieved through leveraging existing infrastructure and activities at the PIs' respective institutions.Recent studies do not agree on the major causes of freshwater accumulation in the Beaufort Gyre region, or the consequences of freshwater release from this region to the North Atlantic. This project will fill that gap by applying the high-resolution, unstructured grid Arctic Ocean - Finite Volume Coastal Ocean Model (AO-FVCOM), complemented by analysis of historical observational data sets from the region, to investigate:1) processes and mechanisms of freshwater accumulation and release in the Beaufort Gyre region; 2) roles of major sources contributing to the freshwater content changes in the Arctic Ocean; 3) pathways of fresh water and sea ice from the Beaufort Gyre to the subpolar North Atlantic; and 4) consequences of this release on hydrography, deep convection and circulation.

博福特环流是北冰洋的环流型。观测记录表明，在2003年至2014年，博福特环流区域积累了超过5000立方公里的液态淡水，相对于20世纪70年代的气候。最近的结果表明，博福特环流系统可能正在进入一个淡水释放期。向北大西洋区域的亚北极海释放如此多的淡水有可能改变该区域的进程，这对气候系统很重要。该项目将调查博福特环流如何积聚和释放淡水，以及这如何影响北冰洋和北大西洋亚北极海的过程。该项目将通过为研究生培训提供支持，为STEM劳动力发展做出贡献。该项目还将在一名年轻女科学家职业生涯的形成期向其提供支助。该项目将继续并加强PI与上海海洋大学（SHOU）建立的富有成效的合作，并利用上海的计算资源。此外，它还得益于SHOU和挪威研究公司Akvapan-niva AS之间的合作，从而可以获得该小组收集的实地观察结果。将通过利用PI各自机构的现有基础设施和活动来实现与K-Gray社区的联系。最近的研究不同意博福特环流区淡水积累的主要原因，或淡水从该地区释放到北大西洋的后果。该项目将通过应用高分辨率、非结构化网格北冰洋-有限体积沿海海洋模型来填补这一空白（AO-FVCOM），并辅以对该地区历史观测数据集的分析，以调查：1）博福特环流区淡水积累和释放的过程和机制; 2）造成北冰洋淡水含量变化的主要来源的作用; 3）淡水和海冰从博福特环流到副极地北大西洋的路径; 4）这种释放对水文、深对流和环流的后果。