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Thursday, January 31, 2019

These ocean robots spent a year collecting data under antarctic ice

It may be difficult for scientists to study the Antarctic Areas, but Ocean Robots are here to help: Autonomous Sub Groups successfully collected data under Dotson Ice Shelf in West Antarctica.

On Wednesday, a press release from the University of Washington stated that to go back to their bases to travel under an ice sheet, measure the depth of the ice shelf, and share the comments, the first self-directed ocean Robots (also known as seaglers) were. Seagulls will help scientists determine how the behavior of ice sheets can affect global sea level changes.

Professor Craig Lee of UW ocean science said in a press release, "This is the first time that any modern, long-lasting platforms have made constant measurements under an ice shelf." "We made extensive measures inside the cavity. Glider Cavity was able to navigate on willpower to survey the interior, while the cavity floats to the ocean currents to reach the interior. "

Robot project, which Paul G. The funding was funded by the Allen Family Foundation, the purpose of which is to gather information on how hot water fountains interact with the bottom part of the snow. With this data, scientists can better understand the dynamics of the ice sheet in Antarctica and how they play a role in melting activity of the ocean.

Lee said in the press release, "Some snow sheets are finished in the big ice shelves, which float above the sea, and they work as a nuts." "If ice shelves collapse or become weak due to the melting of the sea, for example, the sheets of ice behind them can move towards the sea, thereby increasing the sea level."

A sketch shows how to track three self-driving seagulls and four drifting floats under the Antarctic ice shelf. (Photo Credit: Washington University)

On January 24, 2018, seglalgord devices were removed from a Korean icebreaker R / V Aron and the depth of the Dotson Ice Shelf was sent to cruise. What's good about the sea robot that they can work autonomously for more than a year without ship aid, which will help scientists avoid many visits to Antarctica.

Here's how the robot fleet was operated under the Dotsan Ice Shelf: First, three acoustic beacons were placed on seaflors to enable underwater navigation. After this, the three seagulls, which were developed in the UW, were sent to cruise under the ice shelf and to gather data to use the pre-programmed navigation system. Four UW-built EM-APEX floating bots were also deployed by the mission: they had gone above the ice cavities and were bobbed up and down to collect more information from time to time.

Almost six to eight weeks later, three out of the moving bots near the top of the droning ice bot were fired, while a flowing bot did not appear again near the neighboring crosson ice shelf until January 5. Two of the three Seagullers also came back, but the mission has not yet been completed: the other seagulls will start their second year specimen soon on the ice shelf.

Scientists will now study the data brought back by the sea robots to improve the ice sheet behavior model and determine whether hot seawater is blamed for melting.

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