'Dolphin' Robots Join Tech Effort on Antarctica's Melt

 / Updated 
Image: Caltech Seaglider is released in the Weddell Sea off the Antarctic Peninsula
A Caltech Seaglider is released in the Weddell Sea off the Antarctic Peninsula in January 2012. The glider was left for two months to measure temperature, salinity and ocean currents.UEA / Caltech

Breaking News Emails

Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.

Dolphin-sized robots are giving clues to a thaw of Antarctica's ice in a sign of how technology is revolutionizing data collection in remote polar regions, scientists said Monday. An international study led by the California Institute of Technology used three yellow "gliders," about 6 feet, 6 inches (2 meters) long and each costing $240,000, to measure temperature and salinity in the depths of the Weddell Sea off Antarctica. The measurements showed how vast eddies drive heat into shallower waters, helping thaw coastal ice. The findings, in the journal Nature Geoscience, back up theories about how heat moves south.

One of the three gliders got lost, but Karen Heywood, a co-author of the study at England's University of East Anglia, said the technology still was cheaper than a 2007 trip that required a ship costing $30,000 a day, with many stops, to collect less data. Robot gliders can be left for months, diving and surfacing with tiny adjustments to buoyancy. About 3,600 free-drifting "Argo floats" have been deployed worldwide since 2000 to help monitor temperatures and salinity in the seas.

Image: A robotic glider is prepared for release into the Weddell Sea off Antarctica
Liz Creed of Kongsberg Inc., which builds the robotic Seaglider, and Andy Thompson of Caltech run tests before the release of the glider into the Weddell Sea in January 2012.UAE / Caltech

IN-DEPTH

SOCIAL

— Reuters

Breaking News Emails

Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.
MORE FROM news