Gulf Stream Marine Hydrokinetic Energy Off Cape Hatteras, North Carolina
Gulf Stream Marine Hydrokinetic Energy Off Cape Hatteras, North Carolina
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北卡罗来纳州哈特拉斯角附近的湾流海洋流体动力能源
DOI：
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
P. Taylor
中科院分区：
文献类型：
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作者：
M. Muglia;H. Seim;P. Taylor
从固定和船上安装的传感器对海流速度、盐度和温度进行多年测量，量化墨西哥湾流（GS）海洋水动力能（MHK）资源的变化，并为北卡罗来纳州哈特拉斯角的开发提供信息。穿过GS的血管横断面
表明一个喷流样的速度结构，速度超过2.5米/秒的表面，持续的水平剪切整个射流，和最强的垂直剪切内的气旋剪切区。与西部深层边界有关的GS底部的持续向赤道流动
当前（DWBC）产生的垂直剪切层积弱，并假定是一个强湍流混合的网站的局部最大值。在同一地点的重复样带表明，速度结构取决于GS是否邻接陆架斜坡或离岸。
从一个固定的声学多普勒海流剖面仪（ADCP）部署在岸边的GS超过1米/秒64%的时间40米以下的表面。来自ADCP系泊装置的3.75年海流时间序列记录了下游和横流速度（-0.5
至2.5 m/s）和剪切（± 0.05 s-1），由于GS曲流和锋面涡的通过。平均GS方向的海流逆转每月发生几次，GS离岸位置的较长周期变化可能导致海流减少
几周一次未解决的小尺度剪切被假定为湍流混合的显着贡献。
AbstractMulti-year measurements of current velocity, salinity, and temperature from fixed and vessel-mounted sensors quantify Gulf Stream (GS) marine hydrokinetic energy (MHK) resource variability and inform development off Cape Hatteras, NC. Vessel transects across the GS
demonstrate a jet-like velocity structure with speeds exceeding 2.5 m/s at the surface, persistent horizontal shear throughout the jet, and strongest vertical shears within the cyclonic shear zone. Persistent equatorward flow at the base of the GS associated with the Deep Western Boundary
Current (DWBC) produces a local maximum in vertical shear where stratification is weak and is postulated to be a site of strong turbulent mixing. Repeated transects at the same location demonstrate that the velocity structure depends upon whether the GS abuts the shelf slope or is offshore.Currents
from a fixed acoustic Doppler current profiler (ADCP) deployed on the shoreward side of the GS exceed 1 m/s 64% of the time 40 m below the surface. The 3.75-year time series of currents from the ADCP mooring document large, roughly weekly variations in downstream and cross-stream speed (−0.5
to 2.5 m/s) and shear (± 0.05 s−1) over the entire water column due to passage of GS meanders and frontal eddies. Current reversals from the mean GS direction occur several times a month, and longer period variations in GS offshore position can result in reduced currents
for weeks at a time. Unresolved small-scale shear is postulated to contribute significantly to turbulent mixing.
影响因子：
3.5
作者：
Heiderich, Joleen;Todd, Robert E.
通讯作者：
Todd, Robert E.