• Created by Unknown User (dwowens), last modified by Unknown User (tboesenk) on 13-Apr-10
Participants

Tony Wass
George Spence
Laurenz Thomsen
Mikkel Schau
Kaplana Rawat
Dimitri Mirinakis
Ross Chapman
Eric Guillemot
Reyna Jenkins

Hydrates Discussion

Hydrates Intro and background.

Hydrates found exclusively and evidence of thin layer found along the edge of the continental shelf. Temperature pressure and solubility effect hydrates.
Froze state is less conductive.
Bactrial mats and frozen hydrates trap methane. Hydrophone Acoustic analysis of bubbles can determine coating of bubbles.
Spatial distribution very important. Offers an outstanding natural laboratory including hydrocarbon leakage.

Existing experiments

Interactions and conflicts between instruments

None detected

Needs for scheduling of instruments to minimize interference

Establish criteria when to turn on intermittent instruments/hydrophones.

Data format , download or presentation needs from DMAS
  • Microbathymetry and video mosaics. Larger area "Wallyland" bathymetry (50 x 50 m)
  • Plotting utility presets showing (eg seismic activity, temp, methane, pressure, wave height) would be nice.
  • Streaming data - needs formats search tools annotation
  • Events should be flagged, when occurring
  • automatic Emails can be sent during/after events
  • add vectorplot diagram for flow direction and magnitude
  • add progressive vectorplot diagram for flow direction and magnitude
Streaming data- needs formats search tools annotations etc,

Plotting utility should correlate seismic activity and methane release overlap of two parameters
Event of sufficient magnitude across system should trigger intermittent sensors to be turned on.
What is sufficient criteria?

Obstacles to accomplish science

Groundfault not clear, when is it harmful for the JB and when only to the individual instrument
Microbathymetry data are needed (hopefully during May-cruise)
Videomosaick or high res. video of Wallyland needed

Changes in Instrument configuration
  • Sector Scanner Sonar.
  • CTD to be added and replace methane sensor.
  • Pressure Sensor.
  • Modify Temperature sensor to Millidegrees.
  • add heatflow sensors
Changes in Instrument locations

None requested. Present position is excellent.

Future Reccomendations

What changes are desired in terms of current instrument deployment or modes of operation.
  • Plotting utility should correlate seismic activity and methane release overlap of two parameters for example.
  • Event of sufficient magnitude across system should trigger intermittent sensors to be turned on.
    • What is sufficient criteria?
      • Example. Methane bubbles turn on seismic instruments or earthquake prompts instruments to watch for Methane bubbles.
What new instruments would add important dimensions to the current experiment
  • Sector scanner sonar
  • Intermittent hydrophones
  • Modify temperature sensor to millidegrees.
  • Pressure Sensor
  • AUV's with chirp sonar.
  • 889, Sector Scanning Sonar to be deployed
Potential collaboration with c.sc.
  • Scheduling of sonar/hydrophone
  • "Active" sensing for intermittent sensor.
  • Navigation/Localization for Wally
  • Data mining to find areas of interest in time series data.
  • Video analysis automation
Action Items
  • Get more groups to participate in Neptune (eg Canyon groups, microbiologists, closer collaborate with Benthic ecology group)
  • Begin discussion with Ocean Works re Ground fault (DONE).
  • No messages sent when NC instruments are switched off.
  • Plotting utility with Matlab routines.
  • Management of large scale data sets.
  • closer collaboration with robotics groups and computer scientists
  • specifications on new planned instruments must be submitted 1 month prior to deployment
  • start experiments