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Robots to dive deep in CSIRO study of how Southern Ocean life captures carbon

By The Robot Report Staff | December 4, 2020

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Robots to dive deep in CSIRO study of how Southern Ocean life captures carbon

The RV Investigator. Source: CSIRO

Australian scientists this week announced this week that they will deploy a fleet of new, deep-diving ocean robots in the Southern Ocean in a major study of how marine life acts as a handbrake on global warming. The automated probes will search for “marine snow,” which is the name given to the shower of dead algae and carbon-rich organic particles that sinks from upper waters to the deep ocean.

Sailing today from Hobart, Australia, 20 researchers aboard Commonwealth Scientific and Industrial Research Organisation’s (CSIRO) RV Investigator hope to capture the most detailed picture yet of how marine life in the Southern Ocean captures and stores carbon from the atmosphere.

CSIRO voyage the first to combine sensors

This will be the first voyage of its kind to combine shipboard observations, deep-diving robots, automated ocean gliders, and satellite measurements, said Prof. Philip Boyd, voyage chief scientist. He is also a professor at the Institute for Marine and Antarctic Studies (IMAS) at the University of Tasmania.

“The microscopic algae in the ocean are responsible for removing carbon dioxide from the atmosphere as much as the forests on land are,” said Boyd. “When they die, these tiny carbon-rich particles fall slowly to the ocean floor like a scene from a snow globe.”

“We are excited about how this combination of new imaging sensors will allow us to get a larger and much clearer picture of how ocean life helps to store carbon,” he added. “It’s a bit like an astronomer who has only been able to study one star at a time suddenly being able to observe the galaxy in three dimensions.”


Understanding the carbon cycle

Boyd said the research would improve our understanding of a process scientists call the “carbon pump” because it is responsible for pumping large volumes of carbon from the atmosphere into the ocean.

“We are just beginning to understand how the biological carbon pump works, but we know it helps in the removal of about a quarter of all the carbon dioxide that humans emit by burning fossil fuels,” he said. “During the voyage, we will deploy a fleet of deep-diving robotic floats and gliders that use new bio-optical sensors to ‘photograph’ the density of the algae at different depths.”

“When they return to the ocean surface, these floats will immediately transmit their data back to us via satellite,” said Boyd. “It is a major step forward in our ability to measure carbon uptake by marine life.”

The Southern Ocean Large Areal Carbon Export (SOLACE) voyage is scheduled to depart at 8:00 a.m. on Friday, Dec. 4, 2020.

The project includes contributions from CSIRO, the University of Tasmania’s IMAS, the Australian National University, Curtin University, and the Australian Antarctic Program Partnership. This research is supported by a grant of sea time on RV Investigator from the CSIRO Marine National Facility.

Related content: The Robot Report Podcast: How two former Navy SEALs built robot subs for ocean exploration

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