ONC seafloor hydrophones also registered the low-frequency rumbles from this earthquake, along with the calls of humpback whales in the area. This recording is from a hydrophone on Barkley Upper Slope, positioned at a depth of 396 m. In this clip, sound has been sped up 250% to make the earthquake noise audible to the human ear. The squeaking noises prior to the main quake are the sped-up whale calls.
There is currently a lack of consensus over how to average local shipping noise levels to assess the impact of such noise on marine life. Using data collected between Dec. 2011 and Apr. 2012 from an Ocean Sonics low-frequency hydrophone deployed at the VENUS Eastern Strait of Georgia site, this publication...
POGO (Profiling OceanoGraphic Observatory) is alive and well! The vertical profiling system, installed at a depth of 396 m on Barkley Upper Slope is now sending its instrument float on regular journeys from seafloor to surface and back. And some interesting new data products are available for examining a host of water properties through the depth of the water column.
In addition to depth, temperature, and salinity, POGO measures chlorophyll, turbidity, oxygen, carbon dioxide, irradiance and light attenuation and currents. A...
The ocean has become a noisy place. Ships, motorboats, offshore construction projects, even aircraft can be heard from the seafloor, and the din can be deafening. Noise pollution is a problem for whales, dolphins and other marine animals that depend on sounds to communicate, hunt, find mates and navigate complex seafloor terrain.
Although underwater sound pollution is suspected to have many...
