Maybe the scientists are among the majority of Republicans who do believe in climate change. Believing in climate change does not mean a person necessarily believes the solutions put forth by one party are the right ones.
"More Republicans Than You Think Support Action on Climate Change"
https://www.nytimes.com/2018/12/29/opinion/sunday/republicans-climate-change-polls.html
"A majority of Democrats and Republicans believe the United States should participate in the Paris climate accord and reduce greenhouse gas emissions regardless of what other countries do."
"In March, well before the most destructive wildfires in California history, the Yale Program on Climate Change Communication and the George Mason University Center for Climate Change Communication polled 1,067 registered voters on climate change. The study found that while they disagree on the cause, majorities in both parties agree that the world is experiencing global warming and call for government action to address it."
"The survey also found that majorities in both parties think the government should fund research into solar and wind energy, offer tax rebates to those buying energy-efficient vehicles and solar panels, and encourage schools to teach children about the causes and consequences of global warming, and potential solutions. A majority of Democrats and Republicans believe the United States should participate in the Paris climate accord and reduce greenhouse gas emissions regardless of what other countries do."
"A study conducted in June by Stanford, ABC News and Resources for the Future uncovered a similar trend. It found that 66 percent of Republicans believe the increase in temperature is “mostly or partly caused by humans.” Another poll, released last month by Monmouth University in New Jersey, found that most Republicans now support action on climate change."
"o be sure, not every poll shows the same thing. An NBC News/Wall Street Journal poll recently asked people if they believed climate change is “serious” and requires “immediate action.” Only around 15 percent of Republicans said yes compared with 71 percent of Democrats. It’s notable that the poll did not ask, as the Yale study did, for views on specific remedies — which is where the two parties seem to find more common ground."