A fleet of solar-powered robot sailboats is setting off from Tasmania to undertake a groundbreaking five-year study in the Southern Ocean. This ambitious project aims to unlock critical insights into the ocean’s role in capturing carbon emissions that influence our climate.
- Four uncrewed sailboats will sail challenging Southern Ocean waters.
- Sensors onboard will track carbon absorption over multiple circumnavigations.
- Machine learning guides where and when data is collected to fill knowledge gaps.
What happened
This week, the first of four autonomous sailboats—known as uncrewed surface vehicles (USVs)—was launched from Hobart, Tasmania, to begin the Constraining Ocean Carbon with Optimized Observing (COCO2) project. The robots will navigate the cold, rough Southern Ocean, collecting continuous carbon data that has been hard to obtain using traditional methods. Every three months, a new vehicle will join the fleet, with each completing multiple Antarctica circumnavigations over the next five years.
These vessel deployments are powered by solar energy and carry advanced sensors capable of measuring the exchange of carbon between the ocean and atmosphere in real time. By returning periodically to Hobart for sensor upgrades and maintenance, the mission will maintain long-term, consistent observations vital for understanding the ocean’s carbon sink behavior.
Why it feels good
The Southern Ocean covers nearly one-third of the global ocean surface and plays a disproportionately large role in trapping carbon dioxide emissions, helping slow climate change. Yet its harsh environment has long limited direct scientific exploration. With these new robotic vessels, researchers now have a powerful, cost-effective tool to gather data from regions previously inaccessible or too dangerous for manned ships.
Beyond expanding knowledge, the effort strengthens international collaboration with partners from NOAA, Columbia University, CSIRO, and others, enabling shared scientific progress. Accurately quantifying the ocean's carbon uptake closes a significant knowledge gap, improving climate models and informing global policies aimed at curbing greenhouse gases.
What to enjoy or watch next
As the COCO2 project unfolds over the next five years, watch for regularly updated findings as the robot sailboats relay real-time carbon data from the Southern Ocean. This continuous information flow will help scientists identify critical areas where the ocean absorbs carbon more or less efficiently, revealing how climate change might alter this delicate balance.
The project also pioneers the use of machine learning to optimize data collection, directing the robots on where to focus their observations to maximize scientific impact. These innovations herald a new era in ocean monitoring with broad applications for climate research, conservation efforts, and policy decisions worldwide.