Upslope Internal-Wave Stokes Drift, and Compensating Downslope Eulerian Mean Currents, Observed above a Lakebed
Upslope Internal-Wave Stokes Drift, and Compensating Downslope Eulerian Mean Currents, Observed above a Lakebed
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在湖床上方观测到的上坡内波斯托克斯漂移和补偿下坡欧拉平均水流
DOI：
10.1175/jpo-d-15-0114.1
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发表时间：
2016
影响因子：
3.5
通讯作者：
S. Henderson
中科院分区：
文献类型：
--
作者：
S. Henderson
摘要在一个以10 ~ 32 h周期内波为主的小湖泊中，研究了多个波周期内水缓慢但持续的平均输运。声学多普勒剖面仪（ADPs）和一串垂直温度记录仪被部署在下温跃层与倾斜的湖床相交的地方。在河床附近（<1 m以上），内波以~0.023 m s - 1的速度向上传播，与全湖范围的淤积相一致。近床波引起的水速波动的标准差<0.02 m s−1。在地表附近，速度波动幅度相似，但横向波传播不清楚。在许多波周期内平均下来，近层欧拉速度以~0.01 m s - 1向下流动，并被向上的内波斯托克斯漂移大致抵消（通过假设弱非线性波不改变形式传播来估计）。为了检验净输运，当使用松弛近似来估计斯托克斯漂移时，观测到的温度范围（9°-25°C）为…
AbstractIn a small lake, where flows were dominated by internal waves with 10–32-h period, slow but persistent mean transport of water over many wave periods was examined. Acoustic Doppler profilers (ADPs) and a vertical string of temperature loggers were deployed where the lower thermocline intersected the sloping lakebed. Near (<1 m above) the bed, internal waves, coherent with a lakewide seiche, propagated upslope at ~0.023 m s−1. Near-bed wave-induced water velocity fluctuations had a standard deviation of <0.02 m s−1. Near the surface, velocity fluctuations had similar magnitude, but lateral wave propagation was unclear. Averaged over many wave periods, the near-bed Eulerian velocity flowed downslope at ~0.01 m s−1, and was roughly cancelled by an upslope internal-wave Stokes drift (estimated by assuming that weakly nonlinear waves propagated without change of form). To examine net transport, while relaxing approximations used to estimate the Stokes drift, the observed temperature range (9°–25°C) was...
影响因子：
3.5
作者：
S. Groeskamp;J. Zika;T. McDougall;B. Sloyan;F. Laliberté
通讯作者：
S. Groeskamp;J. Zika;T. McDougall;B. Sloyan;F. Laliberté