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首页> 外文期刊>Journal of Physical Oceanography >Altimeter and Current Meter Observations of Internal Tides: Do They Agree?
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Altimeter and Current Meter Observations of Internal Tides: Do They Agree?

机译：内部潮汐的高度计和电流表观测：他们同意吗？

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摘要

Baroclinic tides can be observed both remotely from the Ocean Topography Experiment (TOPEX)/ Poseidon (T/P) altimeter and in situ using current meters. However, it is rare that current meter moorings have high vertical resolution and are located under T/P ground tracks so that a direct comparison can be made between the two methods of observations. Here, data from a current meter mooring directly under a T/P ground track off the Bounty Plateau, New Zealand, are used to obtain energy estimates of the first baroclinic mode. These estimates are compared with those calculated from the T/P surface elevation. The two methods return estimates of the internal tide that are in agreement in phase and direction but have about a factor-of-2 difference in amplitude (and a factor-of-4 difference in energy); the flux estimates are 787 and 170 W m~(-1), respectively. Uncertainties in these estimates are relatively large, and there is a low but not negligible probability that the differences are entirely due to measurement error. However, there are other reasons that might explain the differences in the estimates. It may be that the baroclinic tide is highly modulated in time and the current meters were deployed during a period of relatively low amplitude.
机译：可以从海洋地形实验（TOPEX）/波塞冬（T / P）高度计远程观察斜压潮，也可以使用电流计在原地观察斜压潮。但是，很少有电流表的系泊系统具有很高的垂直分辨率并且位于T / P地面轨道之下，因此可以在两种观测方法之间进行直接比较。在这里，直接来自系在新西兰Bounty高原附近T / P地面轨道下方的电流表的数据，用于获得第一斜斜模式的能量估计。将这些估计值与从T / P表面高程计算出的估计值进行比较。两种方法返回的内部潮汐估计在相位和方向上都一致，但是振幅大约有2倍的差异（以及能量有4倍的差异）。通量估计分别为787和170 W m〜（-1）。这些估计的不确定性相对较大，并且差异完全归因于测量误差的可能性很低，但微不足道。但是，还有其他原因可能会解释估计的差异。可能是斜压潮在时间上被高度调制并且电流计在相对较低的振幅期间被部署。

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