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引用次数: 13
摘要
利用船载多普勒测流仪(ADCP)在法罗海岸海峡进行了观测。在强风和波涛汹涌的海面上航行时，观察到虚假的洋流(50厘米/秒- 1)，当船只转向时，这些洋流就消失了。在台站上，在12和27 h的两个位置检测到强潮汐/惯性电流(约20 cm s−1)。瞬态电流估计通过最小二乘模型拟合提取，残差通过最优插值滤波。得到的非发散流与CTD和XBT同时观测得到的地转切变相结合。挪威海溢流的运输和混合证实了先前的决定。本文还介绍了本研究对WOCE跨洋剖面的指导意义。
Combining hydrographic and shipborne ADCP measurements
Observations with a shipborne Acoustic Doppler Current Profiler (ADCP) were made in the Faeroe Bank Channel. When underway in strong winds and rough seas, spurious currents (>50 cm s−1) were observed which vanished when the ship was hove to. On the station strong tidal/inertial currents were detected (ca 20 cm s−1) at two locations, over periods of 12 and 27 h. Transient current estimates were extracted by a least-squares model fit and the residuals filtered by optimum interpolation. The resulting non-divergent currents were combined with geostrophic shear derived from simultaneous CTD and XBT observations. Transport of, and mixing within, the Norwegian Sea overflow confirm previous determinations. The implication of this research for the conduct of WOCE transoceanic sections is described.
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