Saildrone Fleet Launches Historic Five-Year Mission to Map Antarctica's Carbon Cycle

On September 19, 2026, a groundbreaking initiative to understand the global climate system began as the first of four uncrewed Saildrone Explorer vehicles departed from Hobart, Tasmania, bound for the Southern Ocean. This deployment marks the start of a five-year research campaign led by NOAA, Columbia University, and Australia's CSIRO under the "Constraining Ocean Carbon with Optimized Observing" (COCO2) project. The mission aims to address a critical knowledge gap regarding how much carbon dioxide (CO2) the Southern Ocean absorbs, particularly during the harsh winter months when traditional ship-based research is impossible. The fleet will utilize AI-driven ocean-air models to navigate approximately 12,000-mile circumnavigations of Antarctica, repeatedly returning to port for refurbishment before redeployment. Each vehicle is equipped with robust sensors to measure wind speed, barometric pressure, solar radiation, humidity, air and sea surface temperatures, salinity, chlorophyll, and dissolved oxygen. Crucially, the drones will provide continuous, direct measurements of CO2 exchange between the atmosphere and the ocean. Adrienne Sutton, an oceanographer at NOAA's Pacific Marine Environmental Laboratory and a co-lead of the project, emphasized the significance of the mission. "The global ocean is Earth's largest carbon sink, and the Southern Ocean plays an outsized role," Sutton stated. "With COCO2 we are filling a critical knowledge gap by adding observations during winter — something we has not been able to do with traditional oceanographic tools." The scientific necessity for this autonomous approach stems from the unique nature of the Southern Ocean, which is confined not by continents but by the Antarctic Circumpolar Current. This current drives a massive exchange of heat and carbon. Previous data from a 2019 PMEL Saildrone mission revealed that under winter conditions, deep, CO2-enriched water can churn to the surface, causing the ocean to emit CO2 rather than absorb it. The current COCO2 mission, funded by Schmidt Sciences and involving researchers from the University of Washington and South Africa's Council for Scientific and Industrial Research, seeks to validate these findings with unprecedented coverage of the region's most violent storms. Elizabeth Shadwick, a scientist at CSIRO, highlighted the technological leap this mission represents. "Saildrones will give us unprecedented coverage of regions that we can't get to with research vessels or commercial ships in winter," Shadwick noted. "This autonomous AI-directed ocean tech that takes on the risk of sailing in Southern Ocean storms is truly game-changing." Data collected by the fleet will be routed to NOAA's PMEL and the World Meteorological Organization's Global Telecommunication System (GTS) for integration into global weather models, helping scientists develop more confident estimates of global carbon absorption. ### References 1. NOAA. (2026, October 13). Saildrone research fleet to circle Antarctica for 5 years. https://www.noaa.gov/news/saildrone-research-fleet-to-circle-antarctica-for-5-years 2. Saildrone, Inc. (2026). Saildrone research fleet to circle Antarctica for 5 years [Image credit]. 3. CSIRO. (2026). Saildrone research fleet to circle Antarctica for 5 years [Image credit]. #NexSouk #AIForGood #EthicalAI #ClimateScience #AutonomousOceanography