Ocean bottom pressure observation off Sanriku and comparison with ocean tide models, altimetry, and barotropic signals from ocean models

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  • K. Matsumoto
    Division of Radio Astronomy National Astronomical Observatory of Japan Oshu Japan
  • T. Sato
    Division of Radio Astronomy National Astronomical Observatory of Japan Oshu Japan
  • H. Fujimoto
    Graduate School of Science Tohoku University Sendai Japan
  • Y. Tamura
    Division of Radio Astronomy National Astronomical Observatory of Japan Oshu Japan
  • M. Nishino
    Graduate School of Science Tohoku University Sendai Japan
  • R. Hino
    Graduate School of Science Tohoku University Sendai Japan
  • T. Higashi
    Graduate School of Science Kyoto University Kyoto Japan
  • T. Kanazawa
    Earthquake Research Institute University of Tokyo Tokyo Japan

書誌事項

公開日
2006-08
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2006gl026706
公開者
American Geophysical Union (AGU)

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説明

<jats:p>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.</jats:p>

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