Lawmakers Fight to Stop Dismantling of $386M Ocean Observatory Network as NSF Proceeds With Instrument Removal

A bipartisan group of US senators and two Democratic House committees have sent letters demanding the National Science Foundation reverse its plan to dismantle the Ocean Observatories Initiative, a network of more than 900 ocean sensors built at a cost of $386 million, with House lawmakers going further and accusing the agency of acting illegally by failing to comply with federal notification requirements. Scientists began pulling the first buoy from the Oregon coast on Tuesday, even as senators Jeff Merkley of Oregon and Lisa Murkowski of Alaska announced legislation to prohibit the NSF from spending funds on decommissioning until a thorough scientific review has been completed.

 

The Ocean Observatories Initiative and What Is Being Lost

 

The Ocean Observatories Initiative is a sprawling network of ocean sensors deployed across waters off Oregon, Washington, Alaska, North Carolina, and Greenland, tracking ocean circulation, marine ecosystems, climate change, and extreme weather over more than a decade of continuous operation. Built with $386 million in public investment, the network has produced data freely accessible to the public and has informed more than 500 scientific publications, with the project originally slated to continue for another 15 to 20 years. The NSF directed the removal of most of the system's instruments without prior warning to the scientific community and without scientific review, describing the decision as a descoping aligned with evolving scientific priorities and emerging technologies rather than a cancellation. Scientists, lawmakers, and ocean researchers have rejected that framing and characterised the move as an abrupt and scientifically unjustified termination of one of the most valuable ocean observation assets in the United States.

 

Congressional Response and Legal Challenges

 

The Senate letter, co-led by Merkley and Murkowski and signed by nine additional senators from both parties, urged the NSF to halt the dismantling and conduct a thorough review in consultation with the marine science community before any further action is taken. The senators highlighted the approaching El Niño as particularly poor timing for removing deep-water observation capacity, warning that coastal communities, fishermen, and emergency responders would be left without crucial information for monitoring the weather disruptions and marine heat waves associated with the event. The House letter from the Science, Space and Technology Committee and the Natural Resources Committee was sharper in tone, demanding the agency cease what it described as an expensive, destructive, and illegal action. Federal appropriations law requires the NSF to notify the House and Senate Appropriations Committees at least 30 days in advance of any planned decommissioning of agency-owned assets valued at more than $2.5 million, and the House lawmakers stated that no such notification had been transmitted. Merkley said he learned of the dismantling through news reports and that neither he nor colleagues appeared to have been consulted through any formal process.

 

Read more: Why the Ocean Is Salty

 

Broader Context of Climate Science Cuts

 

The ocean observatory dismantling forms part of a broader pattern of reductions to environmental and climate-related science under the Trump administration, which has moved to scale back research programmes, reduce staffing at NOAA and the Environmental Protection Agency, and ease emissions regulations. The NSF's proposed 2026 budget included a 55 percent cut to the agency, providing the fiscal context within which the decision to descope the Ocean Observatories Initiative was taken. The House letter characterised the decommissioning as particularly damaging from a resource perspective, noting that taxpayers are now paying for research vessels to retrieve hundreds of pieces of instrumentation across the ocean, replacing a decade of continuous monitoring investment with the cost of destroying the infrastructure that generated it. Merkley described the decision as supreme stupidity and a violation of the constitutional distribution of powers, arguing that Congress had authorised and funded the programme and that the executive branch lacked authority to shut it down unilaterally.

 

Implications for Ocean Science and Coastal Resilience

 

The loss of the Ocean Observatories Initiative would leave substantial gaps in the United States' capacity to monitor ocean conditions in near real time across some of the most scientifically and commercially important marine areas on the Atlantic and Pacific coasts. The network provides data that underpins weather forecasting, fisheries management, coastal hazard preparation, and climate research, and its continuous decade-long time series is a scientific asset that cannot be reconstructed once the infrastructure is removed. The timing of the El Niño concern raised by senators is not incidental, as the ability to monitor evolving Pacific conditions in real time directly affects the quality of forecasting available to coastal communities and the maritime industries that depend on accurate environmental information. For the broader ocean science community, the episode illustrates the vulnerability of long-term monitoring infrastructure to abrupt budget and policy shifts that can permanently destroy scientific datasets built through sustained public investment over many years.