The United States announced it will begin decommissioning the Ocean Observatories Initiative (OOI), a $370 million array of over 900 deep‑sea sensors, within the next year. the move follows recommendations from the Heritage Foundation’s Project 2025 and marks an early end to a system that was slated to run for 25 years after its 2016 commissioning. Scientists warn the loss will create a critical void in climate and ocean monitoring.

Heritage Foundation’s Project 2025 drives $48 million annual cut

According to the Heritage Foundation’s “Project 2025: Mandate for Leadership” roadmap,the OOI is labeled a source of “NOAA’s climate alarmism,” prompting the administration to target its $48 million yearly operating budget for elimination. The proposal aligns with other Trump‑era cuts that have slashed more than $1.1 billion from marine science programs, according to the report.

Geographic reach of the OOI:five key U.S. and Arctic sites

The OOI’s sensor arrays span the seafloor and water column off Oregon, Alaska, Washington, North Carolina, and the Irminger Sea between Greenland and Iceland. these locations were chosen to monitor critical processes such as the Atlantic Meridional Overturning Circulation, fisheries health, and coastal erosion, providing continuous real‑time data that has underpinned countless studies.

Cost of rebuilding: $370 million capital plus years of NSF effort

Project insiders say that recreating the OOI would require a fresh capital outlay of roughly $370 million and a multi‑year development effort by the National Science Foundation , should funding ever be secured. The current plan to dismaantle the network over a 15‑month period therefore represents an irreversible reduction in the nation’s observational capacity.

Who questions the shutdown? NOAA’s former chief scientist speaks out

Dr. Craig McLean, who served as acting chief scientist of NOAA during the first Trump administration, criticized the decision, calling it a “profound lack of understanding” of scientific infrastructure. He warned that eliminating the OOI erodes U.S. leadership in global science and leaves coastal commmunities vulnerable to oceanic changes, a sentiment echoed by marine meteorologist Jim Edson, who described the system as one of the world’s most advanced.

What data gaps will emerge? Uncertain impacts on climate modeling

With the OOI’s continuous record set to end, researchers fear a “unprecedented data gap” that could impair models of sea‑level rise, commercial fisheries, and even space‑related climate forecasting. The loss of instruments monitoring an active submarine volcano off Oregon, originally scheduled to run until 2028, highlights the abruptness of the cut.