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Howe, B. M., University of Hawaii at Manoa, Honolulu, USA, bhowe@hawaii.edu
Lukas, R. ., University of Hawaii at Manoa, Honolulu, USA, rlukas@hawaii.edu
Deunnebier, F. ., University of Hawaii at Manoa, Honolulu, USA, fred@soest.hawaii.edu

ALOHA CABLED OBSERVATORY: EARLY RESULTS INCLUDING ACOUSTICS

Since June 2011, the ALOHA Cabled Observatory (ACO) is providing power, network communications and timing to a seafloor node and instruments at 4728 m water depth 100 km north of Oahu. The ACO is a prototypical example of a deep observatory system that uses a retired first-generation fiber-optic telecommunications cable. The cabled observatory system will provide the infrastructure for continuous, interactive ocean sampling enabling new measurements and new modes of ocean observing that integrate ship and cabled observations. Present sensors measure currents, pressure, temperature, and salinity, along with video and acoustics. Turbulence, internal waves, tides and water mass mixing are evident. Prior acoustic data have provided new insights about surface ultra-gravity waves; continuing measurements and analysis will be shown, with examples of nearby earthquakes, distant T-phase arrivals, whales, ships, and wind noise. To extend the spatial sampling footprint, the ACO will host water-column spanning profiling mooring systems and multipurpose active and passive acoustics systems, e.g., acoustic tomography.

http://aloha.manoa.hawaii.edu

Session #:047
Date: 2/21/2012
Time: 11:15
Location: Room 151

Presentation is given by student: No