The South Australian Integrated Marine Observing System SAIMOS

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The South Australian Integrated Marine Observing
System (SAIMOS)
Ocean Gliders for SA Capabilities and
planProf. Chari Pattiaratchiedited presented
by Jim Mitchell
.
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ANFOG Australian National Facility for Ocean
Gliders
Based in WA
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Development Timeline

• 1989 The Slocum Mission appears in Oceanography
• 1990 Office of Naval Technology (ONT) awards Webb
  Research Corporation contract for development of
  Slocum prototype
• 1991 Tests of Slocum prototype and thermal engine
  in Wakulla Springs FL and Lake Seneca NY
• 1993 Autonomous Oceanographic Sampling Networks
  paper appears in Oceanography

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Development Timeline

• 1999 Autonomous Ocean Sampling Network (AOSN) I
  conducted in Monterey Bay, CA to make
  oceanographic surveys. A prototype Spray
  operates for 11 days. Three Seagliders were also
  deployed in the bay.
• 2000 Spray, Slocum, and Seaglider, have completed
  10 day missions
• 2002 Seaglider travels 1000 km off Washington
  Coast.

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Development Timeline

• 2003 August September. AOSN II conducted in
  Monterey Bay CA. Twelve Slocum and five Spray
  gliders are deployed during the 6 week
  experiment, to date the most gliders deployed for
  one project.
• 2004 Sea Gliders operate through a typhoon off
  east Asia
• 2005 Two Sea Gliders fly from Washington coast to
  Hawaii 6 month mission
• 2005 Gliders launched from US Submarine
• 2006 150 gliders in use

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Benefits

• cheaper than shipborne observations
• Operations in all weather
• Designed for launch, monitor, recover or launch,
  forget, recover missions
• Currently satellite telemetry data return from a
  single glider is nearly that originally
  envisioned for the entire 3000-float Argo fleet
  using ARGOS while being a factor of 200 less
  expensive.

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Basics of an Ocean Glider

• Related to ARGO floats but with wings
• Powered by batteries (C or D cells)
• Buoyancy engine pumping oil or water into and
  out of a bladder changes density of vehicle which
  causes glider to sink or float
• Wings provide forward momentum motion through
  the water is a saw tooth pattern
• Control via a rudder or movement of battery pack
  fore to aft and side to side

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Ocean Gliders Description

• Operation depth ratings 50, 200, 1000, 5000 m
• Mission duration 15 days 6 months
• Speed lt 1 kn
• Weight 50-75 kgs in air
• Monitored and programmed at surface from control
  stations located on your desktop.
• R/T communications at surface via radio link,
  Iridium, cell, Argos
• Deployed and recovered from small boats or docks
  by 1 or 2 persons
• Operations in all weather

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Glider Manufacturers

• 3 groups in US building vehicles
• Webb Research Slocum Glider, Thermal Glider
• UofW/APL Seaglider
• Scripps Institute - Spray Glider (now Bluefin)

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(No Transcript)
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Typical Glider saw tooth motion
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Seaglider UofW / APL
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Slocum Electric Glider
Manufactured by Webb Research, USA
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Slocum Electric Glider
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Slocum Electric Glider

• SENSORS
• CTD (conductivity, temperature, depth) - SeaBird
• Dissolved oxygen Aanderaa Optode
• Fluorescence Chlorophyll-a, CDOM (coloured
  dissolved organic matter), Phycoerythrin -
  Wetlabs
• Optical Backscatter turbidity through
  backscattered light at 470nm (blue), 530 nm
  (Green), 660nm (red).

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Investment plan
Glider Purchase 5 shallow (200m) and 5 deep
(1000m) (30) People 3 people glider
preparation Glider deployment and control
data provision (QC) (30) Glider
deployments Data transmission costs,
shipping (30) Schedule 2 shallow water
gliders to be delivered in June 2007 2 deep
water gliders to be delivered in November
2007 Others to come onboard in 2008.
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Glider cross-section Temperature
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Glider cross-section Salinity
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Glider cross-section Density
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SAIMOS gliders

• 1 Slocum 1 Seaglider
• Plus 1 of each shared between SA WA
• Arrival late 2007
• Plan is continuous circuits
• Slocum mouth of Spencer Gulf
• Seaglider SA shelf break

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Tentative Slocum circuitfor year 1(2
circuits/1 mo. Deployment)
.
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Tentative first year Seaglider circuit
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SAIMOS gliders

• Needs
• 1-3 year circuit plan
• Input from data users on important sites to
  include in the circuit
• Input on special sites for dedicated gliders
• Contact jim.mitchell_at_flinders.edu.au