NEAR-BOTTOM CURRENT MEASURED BY ACOUSTIC SENSORS
NEAR-BOTTOM CURRENT MEASURED BY ACOUSTIC SENSORS
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DOI：
10.9753/icce.v16
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发表时间：
1978-01
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使用距离海底 60 厘米、100 厘米和 200 厘米的三个声学计测量了垂直电流剖面。测量地点的深度为84米。发现该轮廓取决于水粒子运动的时间尺度。还观察到电流的埃克曼式转向，并估计摩擦层的厚度。当前数据与波浪测量结果的比较表明，表面波能量的垂直传输比一阶波浪理论规定的要少 30-50%。
A vertical current profile has been measured with three acoustic meters 60 cm, 100 cm and 200 cm from the sea bottom. The depth at the measuring site was 84 metres. The profile is found to depend on the time scale of the water particle motion. An Ekman-like turning of the current is also observed, and the thickness of friction layers is estimated. Comparison of the current data with wave measurements indicates that the vertical transfer of surface wave energy is 30-50 per cent less than first order wave theory prescribes.