Folger Discussion
Here's the place to post your ideas, questions and comments about science projects in Folger Passage. (Just click Add Comment below.)
Breakout Session Attendees
- Amalis Riera (whales - hydrophones)
- John Ford (whales - hydrophones)
- Harald Wauk (whales - hydrophones)
- Michel Andre (hydroacoustics)
- Ron Schouten (DMAS)
- Darryl Biddouck (DMAS)
- Ann Gargett (turbulence)
- Yan Chen (DMAS)
- Ron Tanasichuk (euphausiid/fish productivity; Rapporteur)
- Sally Leys (sessile animal biology - absent)
- Rich Pawlowicz (physical oceanography - absent)
Discussion of Existing Experiments
Interactions/conflicts between instruments
Interactions/conflicts between instruments - Biosonics echo sounder and hydrophone; John and Rich have discussed; Rich will work with NEPTUNE next week to reduce power output of 38 kHz transducer; missed one duty cycle with day on and day off which is less desirable for John; move the hydrophone to 100 m away from the sonar; John's could stay on all the time but not get useful data when the Biosonics is operating; Michel's alogorithm can still extract data extract but this audio would not be amenable for public consumption; John is concerned that 38 Khz transducer may affect animal distributions; Michel suggested that Rich should investigate what the targets in his hydro-acoustic data are; Biosonics could be turned off for a period to develop a control for whales distributions to test how the Biosonics affects whale movements with inplications for live streaming, however this may be confounded by natural seasonal variations in distributions
Scheduling to minimize interference
DMAS: data formats, download/presentations needs
Live audio streaming from hydrophones; Michel will discuss streaming of audio from the Barkley Canyon Axis with Benoit; audio file downloading issues will be resolved soon
Access to Doppler data is frustrating; pre-screening function would be useful; DMAS is working on the issue
DMAS is working with Computing Science Department at UVIC about general issues with respect to camera control and defining pre-sets for the camera; DMAS is doing anticipatory work to deal with the video data
Streaming data: needs, formats, search tools, annotation
John wants to stream live audio to the web; DMAS would have to compress audio into MP3's; Michel says the technology exists; the crowd-sourcing methodology is developing but Michel's methodology may render crowd-sourcing obsolete; crowd-sourcing should still be retained because it will allow for human interaction; Michel says an alarm service is being introduced into their system to alert individuals to specific signals (eg. Killer whale calls)
Obstacles
No vertical profilers and no flourometers (transmissometers are not specific enough)
Changes in instrument configurations
Changes in instruments locations
Relocate hydrophones
Future Recommendations for Existing Experiments
Changes to instrument deployment/operation
Anne requests that Dopplers be on gimballed or adjustable mounts so that turbulence can be measured as well; also ultimately requests 5-beam Dopplers so that vertical velocity can be measured; turbulence crucial to biology and sediment resuspension
New instruments that would add to current experiment
Additional hydrophone array to provide directionality and range information
Add 3 component acoustic velocimeter to measure turbulence