Collaborative Research: POISE (Petermann Ocean Ice Shelf Experiment)-Modeling Ocean Ice Interactions

合作研究：POISE（彼得曼海洋冰架实验）-模拟海洋冰相互作用

• 批准号: 1108205
• 负责人: Laurence Padman
• 金额: $ 7.01万
• 依托单位: Earth and Space Research
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1108205&HistoricalAwards=false
• 关键词: Collaborative; Research; POISE; Petermann; Ocean

Funds are provided for a numerical modeling study of ocean circulation and ocean-ice interaction in Nares Strait, a 500-km long channel that separates northwest Greenland from Ellesmere Island at the northern end of Baffin Bay. The research addresses both Arctic/sub-Arctic sea-ice and freshwater exchange through Nares Strait. The project is motivated by the observation that Nares Strait is a major conduit of freshwater and sea-ice exchange between the Arctic and sub-Arctic oceans. The PIs will combine a high-resolution regional numerical ocean circulation and sea-ice model, forced by output from a high-resolution regional atmospheric model, to study the ocean and sea-ice dynamics and circulation in Nares Strait. A key element of this study is the availability of a high-quality, multi-year observational data set for model evaluation and for inverse modeling that will allow development of an optimized circulation estimate for the entire strait. With this model they will test the sensitivity of Nares Strait throughflow (freshwater, sea ice, and Atlantic Intermediate Water) to projected changes in larger-scale climate factors. Although Fram Strait, the opening between Greenland and Svalbard, is often assumed to provide the dominant exchange pathway between the Arctic and Atlantic Oceans, the narrower passages through the Canadian Archipelago provide a second pathway for flow from the Arctic to the Atlantic Ocean. This study will provide insight on the processes controlling the magnitude of these exchanges, which are believed to influence the formation of dense water in the Labrador Sea that then enters the Atlantic Ocean, contributes to the large scale circulation, and modulates climate.

提供了用于在纳雷斯海峡（Nares Strait）的海洋循环和海洋互动的数值建模研究的资金，纳雷斯海峡（Nares Strait）是一个500公里长的通道，将西北格陵兰岛与巴芬湾北端的埃尔斯米尔岛（Ellesmere Island）分开。该研究涉及北极/亚北极海冰和通过纳雷斯海峡的淡水交流。该项目的动机是，观察到纳雷斯海峡是北极和亚北极海洋之间淡水和海冰交换的主要渠道。 PI将结合高分辨率的区域数值海洋循环和海冰模型，该模型由高分辨率区域大气模型的产量强迫，研究海洋海峡的海洋和海冰动力学以及循环。这项研究的一个关键要素是用于模型评估的高质量，多年观察数据集以及将允许为整个海峡开发优化的循环估算值的反向建模。通过这种模型，他们将测试纳雷斯海峡渗透率（淡水，海冰和大西洋中间水）的敏感性，以预测的大规模气候因素变化。尽管格陵兰岛和斯瓦尔巴群岛之间的开口通常被认为是北极和大西洋之间的主要交换途径，但穿过加拿大群岛的狭窄通道为从北极到大西洋的流动提供了第二条途径。 这项研究将提供有关控制这些交流幅度的过程的见解，这些过程据信会影响拉布拉多海中茂密的水的形成，然后进入大西洋，这有助于大规模循环，并调节气候。