The Trump administration's decision to dismantle the US Ocean Observatories Initiative (OOI) is a reckless move that will have far-reaching consequences for global climate science and marine ecosystems. This move, which has been met with alarm by scientists worldwide, highlights the critical role that ocean observation systems play in our understanding of the climate crisis and the health of our oceans. In my opinion, this decision is not just a setback for science, but a dangerous step backward in our ability to predict and prepare for extreme weather events, such as El Niño, and to monitor the health of our oceans. The OOI, run by the US National Science Foundation, is a vast network of seafloor systems, underwater gliders, and moored surface platforms that feeds critical data to researchers, policymakers, educators, and mariners worldwide. It has been instrumental in studying marine heatwaves, harmful algal blooms, subduction zone earthquakes, ocean acidification, and fisheries variability. The loss of this system would remove a major component of the Global Ocean Observing System (GOOS), a network of robotic floats, moored buoys, and research vessels that experts describe as the 'eyes and ears' of the ocean. The consequences of this loss are profound. Research published last month in Nature Climate Change showed that data losses in GOOS could degrade ocean heat estimates, which are fundamental to weather prediction, El Niño forecasting, and fisheries management. The loss of US observations would be worse than randomly losing 80% of all ocean data worldwide. Ocean heat content is the most robust indicator of climate change we have, and vertical temperature profiles that provide ocean heat content are among the simplest measurements we can make. Lose them, and we lose our ability to track not just ocean warming but the climate system as a whole. Forecasts would continue, but they would degrade, sometimes dangerously so. The economic costs would be felt within the United States itself, from agriculture to insurance to disaster response. This is particularly concerning in a year predicted to be an El Niño year, with 'supercharged' weather extremes. The most recent El Niño, which hit in 2023-2024, was one of the five strongest on record and contributed to 2024's record-breaking increase in global temperature. The European Union has responded by investing in a €92 million initiative called OceanEye, which will boost its own monitoring of the world's oceans. However, this move is not a direct response to the US decision, but a long-planned initiative. The US administration's move to dismantle the OOI is 'penny-wise, pound foolish'. The cost of the observation system is a fraction of the climate costs from hurricanes and storms that hit the US. The US suffered more than 400 climate and weather disasters where damages exceeded or reached $1 billion between 1980 and 2024, and in 2024 alone, the costs of such disasters amounted to $177 billion. The loss of this system is not just a setback for science, but a dangerous step backward in our ability to predict and prepare for extreme weather events, and to monitor the health of our oceans. We need international cooperation to get the best available observations to mitigate risks in our changing world. Without ocean observations, we are flying blind.
