On the frozen stretch of Alaska’s Beaufort Sea, NASA engineers are testing a fleet of robots designed to tackle a pressing scientific issue: the rate at which Antarctica’s ice is melting.
Importance of Melting Ice
Warmer air and water are causing ice to melt, and scientists need to determine how quickly this is happening to predict future sea level rise. If Antarctica’s ice melts completely, global sea levels could increase by up to 200 feet (60 meters), potentially flooding inhabited areas.
IceNode: The Mission to Assess Melting Ice
Understanding the rate at which Antarctica’s ice shelves—large, floating ice formations extending from the land into the ocean—are melting is crucial. However, these areas are extremely challenging to access. NASA’s Jet Propulsion Laboratory (JPL) has developed the IceNode project to measure the melting rates beneath these ice shelves. The IceNode robots are designed to reach the "grounding zone," where ice, land, and ocean converge, and where melting is likely occurring most rapidly. These robots reach the ice’s underside to measure water temperatures and melting rates.
Ian Fenty, JPL climate scientist and the lead for IceNode, notes, “We’ve been working on overcoming these technological and logistical hurdles for years. We believe we have found a solution. The objective is to obtain data directly from the ice-ocean melting interface beneath the ice shelf.”
How the Robots Function
The robots, approximately 8 feet long and 10 inches wide, operate without motors. They use ocean currents to drift, much like a boat in a river. Once in position beneath the ice, they attach themselves and begin collecting data on water and ice conditions. Built to endure harsh Antarctic environments, these robots can operate for up to a year, gathering data across different seasons before transmitting it to scientists via satellite.
Successful Arctic Trials
In March 2024, the IceNode team successfully tested their prototype robot in the icy waters of the Beaufort Sea, north of Alaska. This test, conducted at the U.S. Navy Arctic Submarine Laboratory’s Ice Camp, allowed the team to collect data under extreme conditions, with temperatures dropping to minus 50 degrees Fahrenheit (minus 45 Celsius).
The initial data has been promising, and engineers plan to refine the robots for future missions in both the Arctic and Antarctic. Paul Glick, JPL robotics engineer and IceNode’s principal investigator, expressed optimism about the progress. “We’re pleased with the advancements. The goal is to continue developing prototypes, test them further in the Arctic, and eventually deploy a full fleet beneath Antarctic ice shelves. This data is crucial for scientists, and every step forward is exciting.”
