Long-term stability and noise level of ocean bottom pressure measurements by deep-sea cabled observatories around Japan

D. Inazu, R. Hino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Ocean bottom pressure (OBP) data for tsunami monitoring obtained by cabled seafloor observatories deployed around Japan are known to be significantly affected by temperature changes. We investigated long-term changes of the OBP data including this OBP-temperature relationship using more than ten-year data. The yearly mean OBP changes were found to show gradual increase (O(hPa/year)), and to have no significant correlation to the temperature changes. In contrast, the strong relationship was apparent at periods from hours to days, and we tried to correct the OBP data based on the estimated OBP-temperature relationship. At periods longer than days, noise reduction was not enough for most of the corrected OBP data; however, it turned out that the correction works successfully for the data at a station off Hokkaido (KPG2) in detecting geophysical signals.

Original languageEnglish
Title of host publication2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11
DOIs
Publication statusPublished - 2011 Jun 23
Event2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11 - Tokyo, Japan
Duration: 2011 Apr 52011 Apr 8

Publication series

Name2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11

Other

Other2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11
CountryJapan
CityTokyo
Period11/4/511/4/8

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Ocean Engineering

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