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Water depth dependence of long-range correlation in nontidal variations in seafloor pressure
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  • Tomohiro Inoue,
  • Yoshihiro Ito,
  • Laura Wallace,
  • Yutaka Yoshikawa,
  • Daisuke Inazu,
  • Emmanuel Soliman Garcia,
  • Tomoya Muramoto,
  • Kazuaki Ohta,
  • Syuichi Suzuki,
  • Ryota Hino,
  • Spahr C Webb
Tomohiro Inoue
Graduate School of Science, Kyoto University

Corresponding Author:[email protected]

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Yoshihiro Ito
Disaster Prevention Research Institute, Kyoto University
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Laura Wallace
GNS Science
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Yutaka Yoshikawa
Kyoto University
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Daisuke Inazu
Tokyo University of Marine Science and Technology
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Emmanuel Soliman Garcia
Disaster Prevention Research Institute, Kyoto university
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Tomoya Muramoto
National Institute of Advanced Industrial Science and Technology (AIST)
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Kazuaki Ohta
National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan
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Syuichi Suzuki
Tohoku University
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Ryota Hino
Tohoku University
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Spahr C Webb
Lamont Doherty Earth Observatory
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Isolating the source of non-tidal oceanographic noise in seafloor pressure data is critical for improving the use of these data for seafloor geodetic applications. Residuals between nearby bottom pressure records have typically been used to remove the non-tidal components, as these are largely common-mode. To evaluate the similarities between pairs of observed bottom pressure records at a range of water depths, we calculate the standard deviations of the time series of residuals between data from all site pairs, recorded during a recent experiment offshore New Zealand. Similar to a recent study offshore Cascadia, we find that the magnitude of the standard deviation depends more on relative water depth than the distance between sites. This confirms that non-tidal components are more similar along isobaths even if the distance between sites is large. We show that the depth range varies with the depth of the deeper site of the pairs under restrictions.
28 Apr 2021Published in Geophysical Research Letters volume 48 issue 8. 10.1029/2020GL092173