The evening of May 22, 2013 is fair and sunny. The seas are calm, and the atmosphere on board is cheerful. This afternoon, we finished the last tasks on the NEPTUNE Canada portion of the Ocean Networks Canada Installation and maintenance cruise. We are on the long transit back to Saanich Inlet to continue the last 2 days of work on the VENUS network. Thanks to the Tully crew and the ROV crew, along with all the cruise participants for making the operations a success!
Folger Pinnacle instrument platform, part of Ocean Networks Canada's Folger Passage site, is now back online, streaming data and video from 23 m below sea level in Folger Passage.
On June 26, we completed our summer expedition, Wiring the Abyss 2012 aboard the R/V Thomas G. Thompson (University of Washington). Despite the inevitable challenges we encounter when deploying deep sea instruments, overall the cruise was a success.
On June 11, NEPTUNE Canada reached the halfway point for Wiring the Abyss 2012, this summer’s installation and maintenance cruise. Part of the original crew who set sail on May 27 returned to dry land at Bamfield after a very busy two weeks. They were replaced by a new contingent of crew members, who will remain with the ship until cruise end on 26 June. If you have been following on our cruise page, you’ll know that the first two weeks were very busy indeed!
An intense windstorm left thousands of Vancouver Islanders out of power and forced BC Ferries to suspend service to the mainland on the 22nd. Wind gusts exceeding 110km/h were recorded in places, as a train of intense low pressure systems struck Vancouver Island's west coast one after another. Wave buoy data at the La Perouse Bank (located approximately 50km northwest of Folger Node, ISDM ID online data: C46206) showed extreme waves reaching as high as 18m on 22-23 January.
Acoustic Doppler Current Profilers (ADCPs) are instruments used in our subsea network and other oceanographic applications to measure the currents. We collect data from two types of ADCPs, manufactured by Nortek and RDI.
The Folger Pinnacle instrument platform was installed on August 23, 2010 and connected on February 2, 2011 by a combined team of Pelagic Technologies divers, the Bamfield Marine Sciences Centre (BMSC), and Ocean Networks Canada. Since then, a wealth of data has been gathered by instruments affixed to this 23m deep platform. However, in recent months, Dilumie Abeysirigunawardena, one of our data specialists, noticed a drop in the instruments’ data quality and sensitivity. Some stopped working altogether, while signals from others have gradually diminished. (See, for example, the drop-off in irradiance from our light sensor below – you’d normally expect June to be brighter than February!)
Our Folger Pinnacle instrument platform is now up and running after a team of divers plugged in the extension cable connecting it to Folger Passage node and the rest of the NEPTUNE Observatory last week. Glenn Hafey of Pelagic Technologies made the actual connection after he and his 4-man team dove 23m to the platform from the Bamfield Marine Science Centre’s 9.8m aluminum dive support boat, the Barkley Star.
