IPY: An Innovative Observational Network for Critical Arctic Gateways--Understanding Exchanges through Davis and Fram Straits

李0632231华盛顿大学基金是为了支持一项研究，该研究旨在了解连接北极和北大西洋亚极的主要门户“戴维斯海峡(加拿大北极群岛)”之间的交流。拟议的研究旨在用可靠的误差估计来量化戴维斯海峡水团变异性、体积、液态淡水、热量和冰通量在周到年际的时间尺度。这些测量将被用来促进对这些交换对大西洋和北冰洋大尺度特征的影响的了解。拟议的观测系统目前正在戴维斯海峡开发，采用补充技术来解决交流的关键方面。该系统包括：(1)一个稀疏的地下系泊设备阵列，每个设备都装有向上的声纳、声学多普勒海流剖面仪(ADCP)、电导率-温度(CT)传感器和(深层)常规海流计，将提供上层洋流、冰速和冰层厚度的时间序列；(2)陆架地点配备ADCP、CT传感器和一个创新的低成本包，用于收集受冰威胁的近地表区域的CT时间序列；以及(3)声学导航的海滑仪，以提供全年、重复、戴维斯海峡网络将与贝德福德海洋研究所合作开展。

Lee 0632231University of WashingtonFunds are provided in support of a study to understand exchanges across a major gateway linking the Arctic with the subpolar North Atlantic " Davis Strait (Canadian Arctic Archipelago). The proposed study purports to quantify, with robust error estimates, Davis Strait watermass variability, volume, liquid freshwater, heat and ice fluxes at weekly to inter-annual timescales. These measurements will be used to advance understanding of the impacts of these exchanges on large scale characteristics of the Atlantic and Arctic Oceans. The proposed observation system, currently under development in Davis Strait, employs complementary techniques to resolve critical aspects of the exchange. The system includes: (1) A sparse array of subsurface moorings, each instrumented with an upward looking sonar, an Acoustic Doppler Current Profiler (ADCP), conductivity-temperature (CT) sensors, and (deep) conventional current meters, will provide time series of upper ocean currents, ice velocity, and ice thickness, (2) Shelf sites instrumented with ADCPs, CT sensors and an innovative, low-cost package for collecting CT time series in the ice-threatened near-surface region, and (3) Acoustically navigated Seagliders to provide year-round, repeated, high-resolution hydrographic sections across the straits.The Davis Strait network will be undertaken in collaboration with the Bedford Institution of Oceanography.