Lisa Friedman

Mr. Swanson said that since Mr. Trump took office, the Interior Department had “improved scientific integrity by following the law, using the best available science and relying on the expertise of our professional career staff.”

Trump administration officials have noted that in almost all of these cases, the science was ultimately published.

But scientists said that came at a cost. Dr. Crusius was given informal approval in the summer of 2019 to publish research in the well-regarded journal Earth’s Future, which is published by the American Geophysical Union. Then, in September, after the paper had gone through a round of peer review, his employer, the U.S. Geological Survey, reversed course and opposed publication.

“I appealed this decision, and I was allowed to publish this as a private citizen,” he said.

Dr. Crusius said the research, on the environmental benefits and risks of storing carbon in trees, soil, ocean and wetlands to delay climate impacts, was important because climate change is a problem the government ultimately will need solid science to confront.

“We need all the help we can get, including from both federal and academic scientists,” he said.

The U.S.G.S. denied that the paper was not approved because it dealt with climate change.

Lawmakers and others who work with scientists said publication of the research did not diminish the hurdles thrown in the way, which served to signal that writing about politically disfavored topics comes at a personal price.

At least one case predates the Trump administration. Danny Cullenward, a Stanford Law School lecturer, said the Energy Department tried in 2015 to distance itself from his research, which showed the United States could not meet its Paris Agreement goals with the policies that President Barack Obama was pushing.

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