Mathematics – Logic
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusm.m44a..01j&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #M44A-01
Mathematics
Logic
3600 Mineralogy And Petrology
Scientific paper
In 2007 NEPTUNE Canada will install the first stage of a regional cabled observatory (RCO) in the northeast Pacific Ocean. Stage 2 of the RCO is being developed by the US-based ORION Project Office, through the National Science Foundation's Ocean Observatory Initiative (OOI). For Stage 1, a 800km fiber-optic cable will loop out from a shore station on Vancouver Island to the Juan de Fuca volcanic spreading ridge. Two seafloor nodes are planned, one to support studies of tectonic and hydrothermal activity on the Endeavour Segment of the Juan de Fuca Ridge, and the other for investigation of a broad range of processes in Barkley Canyon, on the continental slope of Vancouver Island. Each node will provide power and Ethernet communications to instruments that comprise multi-disciplinary community science experiments. These experiments were developed through a 2-year series of workshops and a final competition. Data from all instruments will be available on-line, through the NEPTUNE data management and archive system. Investigations at the Endeavour node will focus on links between seismic activity and hydrothermal emissions and their resulting impact on hydrothermal vent organisms and regional oceanic circulation and geochemical fluxes. This area provides a number of technical challenges, including the laying of the backbone cable over a volcanic terrain, and the placement of instruments and extension cables in areas of abundant high-temperature venting. Planned instruments include broad-band seismometers, acoustic Doppler current meters, video and digital still cameras and chemical sensors. Experiments at the Barkley Canyon site will emphasis the effects of water currents passing through the canyon, and seismic activity. Combined biological and physical oceanographic instruments will monitor the interaction between sediment transport along the axis of the canyon and the bioturbation activity of the fauna. A combined physical/biological experiment in the water column will monitor currents, upwelling and plankton productivity. Outcropping gas hydrates on the canyon wall will be studied using fixed cameras, acoustic sensors and heat flow probes, and a crawler vehicle equipped with a camera and sensors. Prior to deployment in 2007, all NEPTUNE instruments will go through a qualification process at dry and wet test bed facilities being established in collaboration with the VENUS cabled observatory project.
Barnes Chris
Bornhold B.
Juniper S.
Phibbs P.
Pirenne Benoit
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