Dynamics and Forcing of Nares Strait from 2003 to 2009: Tidal to Interannual Variability to the West of Greenland

2003年至2009年纳雷斯海峡的动态和强迫：格陵兰岛西部潮汐到年际变化

• 批准号: 1022843
• 负责人: Andreas Muenchow
• 金额: $ 68.43万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-01 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1022843&HistoricalAwards=false
• 关键词: Dynamics; Forcing; Nares; Strait; 2003

Funds are provided to test the hypothesis that the dynamics of Nares Strait is in a state of transition as the season of landfast ice cover diminishes in duration. In particular, the PIs will address two testable hypotheses:H1. Freshwater flux through the Canadian Archipelago presently transitions annually from a dynamic state characterized by land-fast ice (the winter regime) to a different onecharacterized by mobile ice (the summer regime).H2. A regime change towards a longer mobile summer ice regime leads to more variable ice and ocean freshwater flux as the waters of Nares Strait become exposed to time-dependent local atmospheric surface forcing in addition to remote forcing by the ambient Arctic Ocean and Baffin Bay.To do so, they propose to analyze a comprehensive 6-year data set from an array of moored ocean current, salinity, temperature, sea level, and subsurface pressure sensors, as well as ice thickness observations. The data originate from an unprecedented, high-risk, but ultimately successful 2003-2009 Canada-US observational program that took place in Nares Strait, a major pathway of Arctic waters into the North Atlantic to the west of Greenland. They propose to describe and explain the temporally and spatially varying regimes of kinematics and dynamics within this energetic channel. As oceanic fields are forced by vertical and horizontal boundary layer physics at the ice-water, air-water, and ice-air interfaces, the program includes synthesis of data from a meteorological modeling, a remotely-sensed ice (MODIS), and an ice modeling (CICE) component.

提供资金来检验这样的假设：随着陆地冰盖季节的持续时间缩短，内雷斯海峡的动态处于过渡状态。特别是，PI 将提出两个可检验的假设：H1。目前，通过加拿大群岛的淡水通量每年都会从以陆地固定冰（冬季状态）为特征的动态状态转变为以流动冰（夏季状态）为特征的不同状态。H2。由于内雷斯海峡的水域除了受到周围北冰洋和巴芬湾的远程强迫之外，还暴露于与时间相关的当地大气表面强迫，因此向更长的移动夏季冰状况的变化会导致更多变化的冰和海洋淡水通量。为此，他们建议分析来自一系列系泊洋流、盐度、温度、海平面和地下压力传感器以及冰厚度观测的全面的 6 年数据集。这些数据源自 2003 年至 2009 年在纳雷斯海峡进行的一项史无前例、高风险但最终成功的加拿大-美国观测计划，纳雷斯海峡是北极水域通往格陵兰岛以西的北大西洋的主要通道。他们建议描述和解释这个能量通道内运动学和动力学的时间和空间变化机制。由于海洋场受到冰-水、空气-水和冰-空气界面处的垂直和水平边界层物理学的作用，该程序包括对来自气象模型、遥感冰（MODIS）和冰建模 (CICE) 组件。