TY - GEN
T1 - Long-term stability and noise level of ocean bottom pressure measurements by deep-sea cabled observatories around Japan
AU - Inazu, D.
AU - Hino, R.
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79959298420&partnerID=8YFLogxK
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U2 - 10.1109/UT.2011.5774111
DO - 10.1109/UT.2011.5774111
M3 - Conference contribution
AN - SCOPUS:79959298420
SN - 9781457701641
T3 - 2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11
BT - 2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11
T2 - 2011 IEEE Symposium on Underwater Technology, UT'11 and Workshop on Scientific Use of Submarine Cables and Related Technologies, SSC'11
Y2 - 5 April 2011 through 8 April 2011
ER -