River deltas are known for their dynamic nature. Most of the rivers naturally carry silt that eventually enters the ocean and settles at the bottom, continuously changing the shape of the seabed. Seasonal events, such as freshets - when glaciers’ snowmelt enters the river stream - are the time when the seafloor at deltas can change rapidly causing events called “slope failures” or “subsea landslides”. Fraser River delta is one such location where subsea landslides occur regularly, in particular during the spring freshet season (May-June). Natural Resources Canada leads several research programs studying seafloor processes and conducts regular surveys of the delta area.
After several months of “silence”, our instruments in the Strait of Georgia are alive again, with data streaming into the database, and out to users via the website.
According to Paul Macoun, “it was a short and intense cruise aboard the Oceanic Surveyor”. A small team of two from Ocean Networks Canada, and the crew of the Remotely Operated Vehicle Oceanic Explorer reinstalled instrument platforms at the Central and Eastern nodes in the Strait, and recovered three experiments from Saanich Inlet.
Stacked in the image below are 48 plots generated from 16 sensors of the VENUS Ferry System installed on a BC Ferries M/V Queen of Alberni. The comprehensive system monitors oceanographic and atmospheric conditions along ferry transits between Nanaimo (Duke Point) and Vancouver (Tsawwassen).
Oceanographic parameters collected by the system include seawater temperature, salinity, density, dissolved oxygen, turbidity, and the relative concentration of chlorophyll.
Meteorological measurements focus on marine atmospheric boundary layer conditions and include air temperature, humidity, pressure, wind speed and direction, incoming solar radiation, and out-going irradiance.
The image shows a day of data collected on Jan 5th, 2013. For each...
The VENUS Ferry System is back online, collecting data from a number of surface and meteorological station sensors. After the scheduled maintenance the M/V Queen of Alberni (BC Ferries) is back on its route between Nanaimo and Vancouver (Duke Point – Tsawwassen). Browse our data plots gallery or access the data in the archive.
The orange reel holds over 5 km of extension cable on the deck of the “Georgia Transporter” powered barge after a successful recovery. This cable supplies power and a communication link from the East Node in the Strait of Georgia (175m) to an instrument platform near...
This image depicts the surface ocean currents in the Strait of Georgia, measured during a strong ebb tide. The currents, averaged over an hour, were measured using a CODAR (Coastal Ocean Dynamics Applications Radar) system. The VENUS CODAR system consists of two antennae, one at the Iona Wastewater Treatment plant, near Vancouver Airport, the other at the Westshore Coal Terminal, near the BC Ferries port at Tsawwassen. These are labelled in the image as “VION” and “VCOL”, respectively.
During the last 3 weeks, the VENUS seafloor camera feed was used in the Biological Oceanography (EOS/BIOL311) summer course at the University of Victoria. Observing live conditions at 300 m depth in the Strait of Georgia was a rather unique experience to the students learning about ocean processes and marine biology in the coastal environment. Every morning...