Lawmakers fight to stop the Trump administration’s dismantling of a $386M ocean observatory project

Bipartisan lawmakers are pressing the National Science Foundation to reverse a plan that would remove most of the Ocean Observatories Initiative, a $386 million ocean-monitoring network used for climate, marine and weather research.

The dispute escalated on June 15, when AP reported that senators and House members from both parties had sent letters demanding that NSF stop the dismantling plan. The lawmakers said the agency is moving too far, too fast, and they raised both legal and scientific objections.

NSF has said the project is not being canceled outright. In comments cited by AP, the agency said it is “descoping” the program to align with evolving scientific priorities and lifecycle management, and that it remains committed to ocean science.

What NSF plans to do

The Ocean Observatories Initiative is a National Science Foundation major research facility with more than 900 ocean sensors. According to the reporting, NSF has directed that most instruments be removed from sites off Oregon, Washington, Alaska, North Carolina and Greenland by 2027.

The Guardian first reported on May 21 that NSF had initiated the descoping process. By June 2, the outlet reported the administration was proceeding with a scaledown that would remove in-water infrastructure at multiple sites.

A June 3 NSF statement, cited by AP, said the decision was informed in part by a 2025 National Academies report on the future of ocean science. NSF’s media affairs head Mike England later told The Guardian the program was not being canceled entirely and described the change as a broader shift in priorities.

Why lawmakers are objecting

The congressional push is bipartisan. The lawmakers named in the reporting include Sen. Jeff Merkley, Sen. Lisa Murkowski, Reps. Zoe Lofgren and Jared Huffman, along with Democrats on the House Science, Space and Technology Committee and the House Natural Resources Committee.

They argue NSF acted illegally and failed to provide a required 30-day notice before decommissioning high-value assets. Their letters ask the agency to reverse course and preserve the system.

The criticism is not only political. It also centers on process. House Democrats involved in the effort say the agency’s move bypassed notice requirements that should have been triggered before decommissioning equipment of this scale and value.

Why the observatory matters

OOI has been used to track ocean circulation, marine ecosystems, climate change and extreme weather. The data have supported more than 500 scientific publications, according to the reporting.

Scientists warned that cutting the network could weaken long-term observations that satellites cannot fully replace, especially in the deep ocean. The Guardian reported that the plan would end real-time data streams at affected arrays during a phased recovery and removal process.

That has raised concern about the loss of long-term records that support forecasting, disaster preparedness and future research. The stakes extend beyond ocean science itself, because the network also feeds work on weather and climate systems.

The infrastructure is spread across multiple U.S. and North Atlantic sites, which is part of why researchers and lawmakers say the decision carries broad consequences. If the instruments come out as planned, the resulting gaps would be difficult to replace quickly.

How the fight developed

The current confrontation did not begin with the June 15 letters. The Guardian reported on May 21 that NSF had already started the descoping process, making the planned scale-back public before the latest congressional response.

On June 2, The Guardian reported that the administration was moving ahead with the reduction and that in-water infrastructure at multiple locations would be removed. The following day, NSF said in comments cited by AP that it was not abandoning ocean science, but rather reshaping the project.

By June 5, The Guardian was quoting scientists warning that the plan would leave the world “flying blind” in some respects because the observatory provides real-time ocean data from deep and coastal waters. The latest June 15 AP report then brought the congressional pressure into sharper focus.

What happens next

For now, the congressional letters are the strongest public challenge to NSF’s plan. Lawmakers are expected to keep pressing the agency and could seek legislation or appropriations language to block or delay the removal.

It remains unclear how much of the network will survive the descoping process or whether NSF will offer a fuller public response. Scientists and operators are also expected to provide more detail on which arrays, sensors and data streams would remain.

The fight now centers on whether NSF can proceed with a scaledown it says reflects scientific priorities, or whether Congress will force the agency to preserve a major ocean-observing system that lawmakers and researchers say is too important to lose.