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Non-linear oceanic tides observed by superconducting gravimeters in Europe

机译：欧洲超导重力仪观测到的非线性海洋潮汐

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We have analyzed data from nine superconducting gravimeters in Western Europe and detected the contribution of non-linear ocean tides in the quarter-diurnal and sixth-diurnal frequency bands. Despite their small amplitudes, a few nanogals (10~(-11) m s~(-2)), we have compared the tidal loading observations with the loading effects inferred from several non-linear ocean tide models over the North-West European continental shelf and found that they are coherent with the recent models. We also confirmed our results with tide gauge data and Topex/Poseidon altimetric data. We have also shown that the differences between the ocean tidal models are significantly larger than the accuracy of recent superconducting gravimeters. Therefore, we suggest that gravity measurements can be used as an independent validation tool for non-linear ocean tidal models, complementary to tide gauge and bottom pressure records.
机译：我们分析了来自西欧的9个超导重力仪的数据，并检测了非线性海潮在四分之一日和六分之一日频段中的作用。尽管它们的振幅很小，只有几个纳加尔（10〜（-11）ms〜（-2）），但我们已将潮汐载荷观测结果与从西北欧洲大陆上几种非线性海洋潮汐模型推断出的载荷效应进行了比较货架，并发现它们与最近的模型一致。我们还用潮汐仪数据和Topex / Poseidon高程数据确认了我们的结果。我们还表明，海洋潮汐模型之间的差异远大于最近的超导重力仪的精度。因此，我们建议重力测量可以用作非线性海洋潮汐模型的独立验证工具，以补充潮汐表和海底压力记录。

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