Ocean bottom pressure observation off Sanriku and comparison with ocean tide models, altimetry, and barotropic signals from ocean models
Ocean bottom pressure observation off Sanriku and comparison with ocean tide models, altimetry, and barotropic signals from ocean models
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DOI：
10.1029/2006gl026706
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发表时间：
2006-08
影响因子：
5.2
通讯作者：
Koji Matsumoto;Tadahiro Sato;Hiromi Fujimoto;Y. Tamura;M. Nishino;Ryota Hino;Toshihiro Higashi;Toshihiko Kanazawa
中科院分区：
文献类型：
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作者：
Koji Matsumoto;Tadahiro Sato;Hiromi Fujimoto;Y. Tamura;M. Nishino;Ryota Hino;Toshihiro Higashi;Toshihiko Kanazawa
我们讨论了潮汐和非潮汐信号，这是从海洋底部压力（OBP）的测量在两个站点三陆，日本。观测到的潮汐分量和五个海潮模型之间的比较表明，最近的模型的精度优于1.3厘米的8个主要成分的矢量差的平方根和。TOPEX/POSEIDON（T/P）和JASON-1的非潮汐信号的经验估计偏离了OBP记录器观测到的正压信号，这可以归因于高度计数据中的斜压分量。我们还将观测得到的非潮汐正压信号与ECCO模式（风驱动）和九州大学模式（压力驱动）的信号进行了比较。结果表明，压力驱动模式增加了解释方差，建议将风驱动模式和压力驱动模式联合收割机结合起来，以更好地描述周期短于30天的非潮汐海洋质量变率。
We discuss tidal and non‐tidal signals which are obtained from ocean bottom pressure (OBP) measurements at two sites off Sanriku, Japan. Comparison between the observed tidal component and five ocean tide models shows that recent models have accuracy better than 1.3 cm in terms of root sum square of vector differences for eight principal constituents. The empirical estimates of non‐tidal signal from TOPEX/POSEIDON (T/P) and JASON‐1 deviate from barotropic signals observed by OBP recorders, which can be attributed to baroclinic component in the altimeter data. We also compared the non‐tidal barotropic signal derived from the observation with those from ECCO model (wind‐driven) and Kyushu University model (pressure‐driven). The comparison indicates that the pressure‐driven model increases explained variance and it is suggested to combine the wind‐driven model and the pressure‐driven model in order to describe non‐tidal ocean mass variability in particular at period shorter than 30 days.