A small autonomous vessel has embarked on a treacherous 22,000km journey around Antarctica to collect crucial data on ocean carbon dioxide levels. The seven-metre craft, resembling a large kayak in bright orange, is expected to travel through some of the world's most inhospitable waters, propelled by powerful westerly winds and solar energy. This mission, led by CSIRO, aims to enhance our understanding of ocean carbon sinks and their role in climate regulation.
Mission Overview: Collecting Data in Extreme Conditions
The vessel, developed by US maritime company Saildrone, is designed to withstand massive waves, freezing temperatures, and ferocious winds. It will journey east from Hobart towards New Zealand, navigate the Drake Passage, pass South Africa, and return to Hobart. Dr Elizabeth Shadwick, a principal research scientist at CSIRO, hopes to recover the vessel in seven to nine months. The data collected will help scientists better understand the ocean's capacity to absorb carbon dioxide, a key factor in climate change.
Key Features of the Autonomous Vessel
- Heavy keel: Keeps the vessel upright in rough seas.
- Rudder: Allows for steering and course correction.
- Fixed solar sail: Harvests solar energy to power onboard sensors.
- Satellite communication: Enables remote monitoring and adjustments.
Why This Mission Matters for Climate Science
Oceans absorb about a quarter of the carbon dioxide emitted by human activities, slowing the pace of climate change. However, the efficiency of this sink varies, and the Southern Ocean plays a disproportionately large role. By collecting high-resolution data on carbon dioxide levels in the air and sea, this mission will fill critical gaps in our understanding of ocean carbon dynamics. This information is essential for improving climate models and informing policy decisions.
Comparison of Traditional vs. Autonomous Data Collection
| Aspect | Traditional Research Vessels | Autonomous Vessels (e.g., Saildrone) |
|---|---|---|
| Cost | High (crew, fuel, maintenance) | Lower (no crew, solar-powered) |
| Duration | Limited by supplies and crew fatigue | Months-long deployments |
| Coverage | Restricted to specific transects | Continuous, wide-area monitoring |
| Risk | Human safety concerns | No human risk |
Challenges and Expectations
The journey is not without risks. The vessel will face towering waves, icebergs, and unpredictable weather. However, its robust design and remote monitoring capabilities mitigate many dangers. Saildrone will track the vessel via satellite and can adjust its course if needed. The mission team is hopeful that the vessel will withstand the extreme conditions and return valuable data.
FAQ
What is the purpose of this Antarctic mission?
The mission aims to collect data on carbon dioxide levels in the ocean and atmosphere around Antarctica to better understand the role of ocean carbon sinks in climate regulation.

How long will the vessel be at sea?
The journey is expected to take seven to nine months, covering approximately 22,000 kilometres.
How is the vessel powered?
The vessel is propelled by wind and powered by solar energy, with a fixed solar sail and a heavy keel for stability.
This mission represents a significant step forward in autonomous ocean observation. As climate change accelerates, such innovative approaches will be vital for monitoring and mitigating its impacts.
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