NDLI: Off Hatsushima Island observatory in Sagami Bay: multidisciplinary long term observation at cold seepage site with underwater mateable connectors for future use

Content Provider	IEEE Xplore Digital Library
Author	Iwase, R. Asakawa, K. Mikada, H. Goto, T. Mitsuzawa, K. Kawaguchi, K. Hirata, K. Kaiho, Y.
Copyright Year	2003
Description	Author affiliation: Japan Marine Sci. & Technol. Center, Yokosuka, Japan (Iwase, R.; Asakawa, K.; Mikada, H.; Goto, T.; Mitsuzawa, K.; Kawaguchi, K.; Hirata, K.; Kaiho, Y.)
Abstract	On the seafloor at the depth of 1175 m off Hatsushima Island in Sagami Bay, Central Japan,a cable-connected multi-disciplinary observatory was installed in 1993. Since then long-term real time observation has been carried out, experiencing replacement for upgrades in 2000, recovery and re-deployment for repair in 2002. This site is known as one of the most significant cold seepage sites with large chemosynthetic biological communities consisted mainly of Vesicomyid clams (Calyptogena). The upgraded second observatory is equipped with underwater mateable connectors (optical/electrical). The observatory revealed geophysical and biological events occurred on the seafloor, such as the mudflows and sedimentation generated by swarm earthquakes, spawning of clams triggered by water temperature change. However, several kinds of phenomena and technological problems yet to be neither identified nor solved still remain. As a next step, the observatory is planning to be utilized as a test bed, by using the underwater mateable connectors.
Sponsorship	IEEE Oceanic Eng. Soc. Japan Chapter Earthquake Res. Inst., Univ. Tokyo Inst. Ind. Sci., Univ. Tokyo Ocean Res. Inst., Univ. Tokyo Japan Marine Sci. & Technol. Center
Starting Page	31
Ending Page	34
File Size	380250
Page Count	4
File Format	PDF
ISBN	0780377753
DOI	10.1109/SSC.2003.1224105
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-25
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Observatories Connectors Sea floor Earthquakes Underwater cables Marine technology Indium tin oxide Probes Sonar equipment Power supplies
Content Type	Text
Resource Type	Article

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