Planned US budget cuts for 2026 have created uncertainty around the Argo programme, one of the world’s most crucial international ocean research collaborations.
The United States currently finances about half of the programme, which consists of around 4,000 autonomous floats monitoring ocean health worldwide.
If the cuts go ahead, other countries will need to step in to prevent a severe weakening of global ocean observation, according to researchers at Norway’s Institute of Marine Research.
Argo is described as “our best tool” for understanding what is happening beneath the ocean surface in a rapidly changing climate. The programme has delivered continuous data for 25 years. It has no real alternatives, especially in harsh, remote sea areas that are strategically important to countries such as Norway.
Why Argo matters
The oceans play a critical role in the Earth’s system. They produce around half of the oxygen we breathe, store vast amounts of CO₂, and regulate global temperatures through ocean currents.
“In other words: if the ocean struggles, we struggle,” the authors write.
Argo floats measure temperature, pressure and salinity down to 2,000 metres, with newer units reaching 6,000 metres. Data are sent via satellite in near real time and are freely available to scientists worldwide.
Heavy reliance on the data
Argo data underpin weather and climate models. The European Centre for Medium-Range Weather Forecasts uses them routinely, while Norway’s Meteorological Institute relies on the data daily.
In the US and Caribbean, Argo data are key for early warnings of tropical storms and tornadoes. More than 6,000 scientific papers have been based on Argo measurements.
Costs and Norway’s role
The programme costs about NOK 400 million per year, equal to roughly EUR 34 million. Each float lasts around five years and costs between NOK 300,000 and 1.5 million (about EUR 26,000–130,000).
Norway operates 30–40 floats through NorArgo in the Barents Sea, the Norwegian Sea, and the Greenland Sea. Funding is only secured until 2026.
The authors, Nils Gunnar Kvamstø and Kjell Arne Mork, argue that more stable and predictable financing is urgently needed.