The Wirewalker: A Vertically Profiling Instrument Carrier Powered by Ocean Waves

R. Pinkel Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California

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M. A. Goldin Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California

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J. A. Smith Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California

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O. M. Sun Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California

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A. A. Aja Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California

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M. N. Bui Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California

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T. Hughen Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California

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Abstract

Ocean wave energy is used to drive a buoyant instrument platform down a wire suspended from a surface float. At the lower terminus of the profiling range, the cam that rectifies wave vertical motion is released and the package, termed the Wirewalker, free ascends. No electronic components are used in the profiler, and only a few moving parts are involved. The Wirewalker is tolerant of a broad range of payloads: the ballast is adjusted by adding discrete foam blocks. The Wirewalker profiles 1000–3000 km month−1, vertically, with typical missions lasting from days to months. A description of the profiler is presented along with a discussion of basic profiling dynamics.

Corresponding author address: Dr. Robert Pinkel, Mail Code 0213, Office 356 OAR, 9500 Gilman Drive, Scripps Institution of Oceanography, La Jolla, CA 92093-0213. Email: rpinkel@ucsd.edu

Abstract

Ocean wave energy is used to drive a buoyant instrument platform down a wire suspended from a surface float. At the lower terminus of the profiling range, the cam that rectifies wave vertical motion is released and the package, termed the Wirewalker, free ascends. No electronic components are used in the profiler, and only a few moving parts are involved. The Wirewalker is tolerant of a broad range of payloads: the ballast is adjusted by adding discrete foam blocks. The Wirewalker profiles 1000–3000 km month−1, vertically, with typical missions lasting from days to months. A description of the profiler is presented along with a discussion of basic profiling dynamics.

Corresponding author address: Dr. Robert Pinkel, Mail Code 0213, Office 356 OAR, 9500 Gilman Drive, Scripps Institution of Oceanography, La Jolla, CA 92093-0213. Email: rpinkel@ucsd.edu

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