NDLI: Deep sea current measurement with 3-D Sing-around acoustic Doppler current meter

Content Provider	IEEE Xplore Digital Library
Author	Mitsuzawa, K. Momma, H. Hotta, H.
Copyright Year	1995
Description	Author affiliation: Dept. of Deep Sea Res., Japan Marine Sci. & Technol. Center, Yokosuka, Japan (Mitsuzawa, K.; Momma, H.; Hotta, H.)
Abstract	A deep sea floor (about 1960 m) in the Suruga Trough that is located 150 km away to south-east of Tokyo, Japan, is known to have a distribution of current ripples. It implies that there is strong current and bottom sediment transportation near the floor. In 1990, the authors measured current velocity in the bottom layer using a mooring system with a 3D Sing-around acoustic Doppler current meter, an electromagnetic current meter and a 8 mm-video camera for a week. In 1992, in order to determine the spatial distribution of current ripples and current structures, dives of a manned submersible Shinkai 2000 that was equipped with the 3D Sing-around Acoustic Doppler current meter were carried out. The results obtained from the observations are as follows: (1) A strong movement of the sediment and daily change of strong current are observed by the mooring system current meters and the video camera. (2) The authors have obtained cross-the-trough distribution of current ripples at the sea floor of the Suruga Trough by dives of Shinkai 2000. (3) 3D current measurements near the bottom reveal that the percentage of vertical component for absolute velocity depends on the mean velocity.
Starting Page	246
Ending Page	250
File Size	453660
Page Count	5
File Format	PDF
ISBN	0780324374
DOI	10.1109/CCM.1995.516182
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-02-07
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Sea floor Sediments Cameras Transportation Acoustic measurements Sea measurements Velocity measurement Electromagnetic measurements Underwater vehicles
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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