Ocean-sampling robot gliders tracking animals, providing storm data

Sep 13, 2013
Ocean Tracking Network research assistant, Adam Comeau, checks glider instrumentation before glider deployment. Credit: Christena MacDonald, OTN/MEOPAR

Researchers from U.S. and Canadian institutions are teaming up for a coordinated launch of up to 14 autonomous ocean-monitoring gliders. The gliders will collect a unique and extensive set of oceanographic and animal-tracking data along the North American Eastern Seaboard. The mission represents the largest international use of coordinated autonomous sampling vehicles attempted to date.

Launched between Georgia and Nova Scotia, the will travel east to the continental shelf break and back during the month- to two-month-long mission. The multi-institution survey will serve as of large-scale marine coordination to monitor the oceanographic conditions that directly influence animal migrations and .

Rutgers University leads the mission to which the Dalhousie-based Ocean Tracking Network (OTN) is contributing two Slocum gliders to be launched from Yarmouth and Halifax, respectively. Members of the U.S. Integrated Ocean Observing System (IOOS) are also participating.

Slocum gliders—named for the first sailor to travel solo around the world, Nova Scotian Joshua Slocum—move by altering their density to ascend or descend in the water column. Wings on the glider convert vertical displacement into forward motion resulting in a saw-tooth dive pattern down to 500 metres below the surface. A series of sampling instruments collects, stores and transmits data back to researchers via satellite in near real-time.

Ocean Tracking Network ocean glider (sans wings) getting prepped before deployment on 10/09.

Eight of the 14 gliders are equipped with Vemco mobile transceivers—tracking devices that record the presence of acoustically tagged . The timing of the coordinated glider mission coincides with migration periods for many species and serves to inform poorly understood of species like blue sharks. Of special interest to OTN investigators are insights into the unanticipated absence of off the southern tip of Nova Scotia in 2013.

The mission will also collect important data on the shelf's thermal structure for forecasting major storm events. September to October is the peak differential period between air and sea temperatures—the phenomenon that powers hurricanes.

"We are hitting just the right moment to capture important data that will almost certainly impact our understanding of animal movements and major storms in Nova Scotia and the Atlantic coast," said Dr. Fred Whoriskey, OTN executive director. "This is a very exciting opportunity for scientists to serve the general public, and to make this information easily understandable and publicly accessible."

Explore further: Thousands of intense earthquakes rock Iceland

More information: Data from the missions will be available on the web at the OTN glider page (gliders.oceantrack.org) and the IOOS Glider Asset Map (www.ioos.noaa.gov/observing/ob… lider_asset_map.html).
More information is available from the Mid-Atlantic Regional Association for Coastal Ocean Observing Systems blog (maracoos.org/blogs/main/).

add to favorites email to friend print save as pdf

Related Stories

Underwater gliders may change how scientists track fish

Jun 22, 2010

Tracking fish across Alaska's vast continental shelves can present a challenge to any scientist studying Alaska's seas. Researchers at the University of Alaska Fairbanks have successfully tested a possible ...

Rusty stirs up double trouble surprise

Mar 06, 2013

(Phys.org) —As Tropical Cyclone Rusty crossed the Pilbara coast last week, the ocean's turbidity levels exceeded the maximum range of scientists' instruments.

University's website lets you keep track of sharks

Aug 07, 2013

One tiger shark, affectionately known as Harry Lindo, swam an unprecedented 27,000 miles in three years. A couple of others, a tiger and a shortfin mako, dove 3,000 feet deep. Others thrashed through the seas at up to 60 ...

Robot gliders roam seas

May 03, 2013

(Phys.org) —Once the robotic gliders scour the ocean searching for potential harm to sea life, the data is sent to David Caron, professor of biological sciences in USC Dornsife, and other marine biologists. ...

Recommended for you

NASA sees Tropical Storm Lowell's tough south side

9 hours ago

The south side of Tropical Storm Lowell appears to be its toughest side. That is, the side with the strongest thunderstorms, according to satellite imagery from NOAA's GOES-14 and NASA-NOAA's Suomi NPP satellites.

User comments : 0