Estimating internal wave energy fluxes in the ocean
Estimating internal wave energy fluxes in the ocean
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DOI：
10.1175/jtech1784.1
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发表时间：
2005-10-01
影响因子：
2.2
通讯作者：
Kunze, E
中科院分区：
文献类型：
--
作者：
Nash, JD;Alford, MH;Kunze, E
能量通量是理解内波产生、传播和耗散的基本量。本文考虑了在时间和深度上都可能是稀疏的海洋观测资料对内波能量通量（u'p'）的估计。采样必须有足够的深度，以允许使用静水平衡来估计内波引起的压力异常p'，并在足够的时间内允许相位平均。考虑到的数据限制包括剖面时间序列的粗时间或垂直采样，缺少近地表或近底部信息的剖面，稀疏垂直采样的系泊，以及没有及时相干重新采样的水平测量。描述了方法、解释和错误。对于夏威夷海脊辐射的半日能量通量的具体情况，从6个跨度为15 h的全深度剖面估计的典型误差接近10%。
Energy flux is a fundamental quantity for understanding internal wave generation, propagation, and dissipation. In this paper, the estimation of internal wave energy fluxes (u'p') from ocean observations that may be sparse in either time or depth are considered. Sampling must be sufficient in depth to allow for the estimation of the internal wave-induced pressure anomaly p' using the hydrostatic balance, and sufficient in time to allow for phase averaging. Data limitations that are considered include profile time series with coarse temporal or vertical sampling, profiles missing near-surface or near-bottom information, moorings with sparse vertical sampling, and horizontal surveys with no coherent resampling in time. Methodologies, interpretation, and errors are described. For the specific case of the semidiurnal energy flux radiating from the Hawaiian ridge, errors of similar to 10% are typical for estimates from six full-depth profiles spanning 15 h.