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Rocket scientists build robot probes to gauge melting below Antarctica ice shelf

Engineers who specialize in building NASA spacecraft to check out remote worlds are designing a fleet of undersea robotic probes to measure how rapidly environment modification is melting huge ice sheets around Antarctica and what that implies for rising sea levels.

A prototype of the submersible automobiles, under advancement by NASA's Jet Propulsion Lab near Los Angeles, was evaluated from a U.S. Navy laboratory camp in the Arctic, where it was released beneath the frozen Beaufort Sea north of Alaska in March.

These robotics are a platform to bring science instruments to the hardest-to-reach places on Earth, Paul Glick, a JPL Robotics engineer and principal investigator for the IceNode project, stated in a summary published on Thursday on NASA's site.

The probes are focused on providing more accurate data gauging the rate at which warming ocean water around Antarctica is melting the continent's coastal ice, enabling scientists to enhance computer models to forecast future water level rise.

The fate of the world's largest ice sheet is a significant focus of almost 1,500 academics and researchers who gathered today in southern Chile for the 11th Scientific Committee on Antarctica Research conference.

A JPL analysis released in 2022 discovered that thinning and falling apart away of Antarctica's ice rack had lowered its mass by some 12 trillion lots given that 1997, double previous price quotes.

If melted completely, according to NASA, the loss of the continent's ice rack would raise international sea levels by an estimated 200 feet (60 meters).

Ice shelves, drifting pieces of frozen freshwater extending miles from the land into the sea, take countless years to kind and imitate huge buttresses holding back glaciers that would otherwise slide off easily into the surrounding ocean.

Satellite images have shown the outer calving off into icebergs at a higher rate than nature can replenish rack growth.

At the very same time, increasing ocean temperature levels are deteriorating the racks from underneath, a phenomenon scientists hope to take a look at with higher precision with the submersible IceNode probes.

The round lorries, about 8 feet (2.4 meters) long and 10 inches (25 cm) in diameter, would be launched from boreholes in the ice or from vessels at sea.

Although equipped with no kind of propulsion, the robotic probes would drift in currents, using special software assistance, to reach grounding zones where the frozen freshwater rack meets the ocean saltwater and land. These cavities are impenetrable to even satellite signals.

The goal is getting information straight at the ice-ocean melting user interface, stated Ian Fenty, a JPL environment researcher.

Upon arrival at their targets, the submersibles would drop their ballast and float upwards to affix themselves to the underside of the ice rack by releasing three-pronged landing. gear derived from one end of the automobile.

The IceNodes would then constantly record data from. beneath the ice for up to a year, consisting of seasonal. variations, before releasing themselves to wander back to the. open seas and send readings by means of satellite.

Formerly, thinning of the ice shelf was documented by. satellite altimeters determining the altering height of the ice. from above.

Throughout the March field test, an IceNode prototype descended. 330 feet (100 meters) into the ocean to gather salinity,. temperature and circulation data. Previous tests were carried out in. California's Monterey Bay and listed below the frozen winter surface of. Lake Superior, off Michigan's upper peninsula.

Eventually, researchers believe 10 probes would be ideal to. gather data from a single ice shelf cavity, but we have more. development and testing to go before developing a timeline for. full-blown release, Glick said.

(source: Reuters)