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echosounder

Mar 3, 2014

New Findings Presented at Ocean Sciences 2014

A new batch of interesting talks and posters were presented at the February 2014 Ocean Sciences Meeting by scientists using Ocean Networks Canada data and facilities. These included work by scientists in a range of disciplines as well as several of our staff members. 

Marine Biology

Inter- and Intra-Annual Variability of Zooplankton Abundance in Saanich Inlet, British Columbia

This poster by researchers at the University of Washington, Institute of Ocean Sciences and the University of Victoria presents an innovative way to visualize echosounder data to the variability of zooplankton abundance and migration patterns.

Redistribution of the Epibenthic, Soft-Bottom Assemblage in Shifting Hypoxic Conditions

... Read more

conferences | posters | publications | education | ASL | sonar | echosounder | Arctic | profiler | biodiversity | benthic | mentoring | hypoxia | epibenthic | oxygen | QA | QC | tidal mixing | nutrient flux | tsunamis | zooplankton | heat flux

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Jun 3, 2013

Complex Nature of Zooplankton Migration

Zooplankton migration visualization.

A recent publication in Marine Ecology Progress (Marine Ecology Progress, 2013 V.480, pp 39-56) sheds more light on the...

Read more

zooplankton | saanich inlet | echosounder | chlorophyll | migration

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Apr 30, 2012

Calibrated Acoustic Backscatter Volume Sv Values

Calibrated acoustic backscatter volume Sv values.

After years of collecting, presenting, and delivering raw echo-sounder data, we have (finally) got around to confirming the calibration of our echo-sounder systems and can now produce calibrated backscatter volume values [Sv]. Shown here is the ZAP echo-sounder data from April 18, 2012 in Saanich Inlet.

The raw counts have now been converted into proper volume backscatter values [dB re 1/m],...

Read more

data | echosounder | acoustic | ZAP | saanich inlet | venus

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Oct 24, 2019

Mar 16, 2012

Storm Watching

19-23 January 2012:

 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.

 

...

Read more

Storm | wave height | adcp | data | Research | zooplankton | echosounder | folger passage

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Dec 12, 2011

Autonomous vs. Cabled: See the Difference?

An upward-looking echosounder was deployed in Saanich Inlet on 3 July 2011. The instrument was part of an “autonomous” (i.e., battery-powered, internally-recording) package of instruments that filled in for the usual cabled instruments while the Saanich communications node was out of the water for three months for a scheduled upgrade.

...

Read more

autonomous instruments | echosounder | realtime data

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Bubbles Rising From the Delta Sediments
Nov 7, 2011

ZAP Data from Saanich Inlet
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Nov 7, 2011

Bubbles Rising From the Delta Sediments

Bubbles Rising from the Delta Sediments.

Dynamic sediments and sediments with active biogeochemistry often generate a variety of chemical compounds, some of which will be gaseous. This inverted echo-sounder image from 30 October 2011 at the Delta Dynamics Laboratory in the Strait of Georgia at 108m water depth near the mouth of the Fraser River has captured numerous clouds of rising bubbles. Such bubbles have several...

Read more

bubbles | ddl | Sediments | echosounder | Fraser River Delta | strait of georgia | biogenic gas | tidal influences

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Apr 5, 2010

ZAP Data from Saanich Inlet

ZAP Data from Saanich Inlet.

The Zooplankton Acoustic Profiler (ZAP) data from Saanich Inlet reveals the diel migration of zooplankton, many individual fish, and even strange acoustic backscatter layers.

Read more

ZAP | Zooplankton Acoustic Profiler | plankton | migration | echosounder | saanich inlet

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Sep 14, 2009

Zooplankton Acoustic Profilers (ZAP) strip charts

 Strait of Georgia East Location ZAP strip plots

The Zooplankton Acoustic Profilers (ZAP) are 200 kHz inverted echosounders. They ping every 2 seconds and record the vertical and temporal variations in zooplankton and fish concentrations in the water column. Shown here is a strip-chart version of the data from the Eastern Strait of Georgia platform at 170 m water depth. This display is updated daily. A similar strip-chart is available for the Saanich Inlet ZAP data. Individual hourly plots are also available.


ZAP | Zooplankton Acoustic Profiler | echosounder

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New Findings Presented at Ocean Sciences 2014
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Calibrated Acoustic Backscatter Volume Sv Values
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Storm Watching
Mar 16, 2012

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