Physics – Geophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmos11a1152b&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #OS11A-1152
Physics
Geophysics
[1964] Informatics / Real-Time And Responsive Information Delivery, [3050] Marine Geology And Geophysics / Ocean Observatories And Experiments, [4262] Oceanography: General / Ocean Observing Systems, [9355] Geographic Location / Pacific Ocean
Scientific paper
Through summer 2009, NEPTUNE Canada installed a regional cabled ocean observatory across the northern Juan de Fuca Plate, north-eastern Pacific. This provides continuous power and high bandwidth to collect integrated data on physical, chemical, geological, and biological gradients at temporal resolutions relevant to the dynamics of the earth-ocean system. As the data is freely and openly available through the Internet, this advance opens the ocean to the world. Building this $100M facility required integration of hardware, software, and people networks. Hardware includes: 800km powered fibre-optic backbone cable (installed 2007); development of Nodes and Junction Boxes; acquisition, development of Instruments including mobile platforms a) 400m Vertical Profiler (NGK Ocean) for accessing full upper slope water column, b) a Crawler (Jacobs University, Bremen) to investigate exposed hydrates. In parallel, software and hardware systems are acquiring, archiving, and delivering continuous real-time data. A web environment to combine this data access with analysis and visualization, collaborative tools, interoperability, and instrument control is in place and expanding. A network of scientists, engineers and technicians are contributing to the process in every phase. The currently installed experiments were planned through workshops and international proposal competitions. At inshore Folger Passage (Barkley Sound, west Vancouver Island), understanding controls on biological productivity will evaluate the effects of marine processes on invertebrates, fish and marine mammals. Experiments around Barkley Canyon will quantify changes in biological and chemical activity associated with nutrients and cross-shelf sediment transport at shelf/slope break and through the canyon. Along the mid-continental slope, exposed and shallowly buried hydrates allow monitoring of changes in their distribution, structure, and venting, and relationships to earthquakes, slope failures and plate motions. Circulation obviation retrofit kits (CORKs) at mid-plate ODP 1026-7 wells will monitor real-time changes in crustal temperature and pressure, in response to earthquakes, hydrothermal convection or plate strain. At Endeavour Ridge (instruments installed 2010), complex interactions among volcanic, tectonic, hydrothermal and biological processes will be quantified at western edge of Juan de Fuca plate. Across the network, high resolution seismic information will elucidate tectonic processes and earthquakes, and a tsunami system will determine open ocean tsunami amplitude, propagation direction, and speed. The infrastructure has capacity to expand and we invite participation in experiments, data analysis and technology development; for information and opportunities: http://www.neptunecanada.ca. NEPTUNE Canada will transform our understanding of biological, chemical, physical, and geological processes across an entire tectonic plate from the shelf to the deep sea (17-2700m). Real-time continuous monitoring, archiving, and long time series allow scientists to capture the temporal nature, characteristics, and linkages of these natural processes in ways never before possible.
Barnes Ronnie C.
Best Micheal
Bornhold B.
Johnson F.
Phibbs P.
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