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Laboratory experiment for sustainable pressure observation at the seafloor

P3.1-311
Not scheduled
1h
Zeremoniensaal

Zeremoniensaal

E-poster T3.1 Seismic, Hydroacoustic and Infrasound Technologies and Applications P3.1 Seismic, Hydroacoustic and Infrasound Technologies and Applications

Speaker

Mr Hiroyuki Matsumoto (Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

Description

A pressure gauge at the seafloor is key sensing instrument for geophysics and oceanography. Pressure change over time can be consent to the seafloor deformation associated with plate convergence in the plate subduction zone or the magma injection near the submarine volcanoes etc. It is also suggested that pressure change at the seafloor can be partly reflected by the ocean current variations, e.g., the Kuroshio merenda in Japan. On the other hand, sensor drift, i.e., offset from the standard pressure is observed in pressure gauge, whose rate is sometimes larger than the in-situ true pressure change. Therefore, a stable pressure gauge should be selected for long-term continuous observation to perform quantitative pressure measurement. The Japan Agency for Marine-Earth Science and Technology (JAMSTEC) has developed the seafloor observatories network known as DONET, long-term borehole observatory system (LTBMS), or campaign-typed pressure sensing system in the past, which are composed of pressure gauges. All pressure gauges were pressurized by a pressure balance with equivalent static pressure to an installed water depth before deployment. This experimental procedure allowed us to determine which pressure gauge was best suited for in-situ measurement. Screening of the better sensors can reflect to the more sustainable in-situ observation.

E-mail [email protected]

Author

Mr Hiroyuki Matsumoto (Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

Co-authors

Dr Aki Ito (Japan Agency for Marine-Earth Science and Technology (JAMSTEC)) Dr Keisuke Ariyoshi (Japan Agency for Marine-Earth Science and Technology (JAMSTEC)) Dr Yuya Machida (Japan Agency for Marine-Earth Science and Technology (JAMSTEC)) Dr Satoru Tanaka (Japan Agency for Marine-Earth Science and Technology (JAMSTEC)) Dr Eiichiro Araki (Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

Presentation materials

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