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The debate over global warming has created predictable adversaries, pitting environmentalists against industry and coal-state Democrats against coastal liberals. But it has also created tensions between two groups that might be expected to agree on the issue: climate scientists and meteorologists, especially those who serve as television weather forecasters.

Climatologists, who study weather patterns over time, almost universally endorse the view that the earth is warming and that humans have contributed to climate change. There is less of a consensus among meteorologists, who predict short-term weather patterns.

Joe Bastardi, for example, a senior forecaster and meteorologist with AccuWeather, maintains that it is more likely that the planet is cooling, and he distrusts the data put forward by climate scientists as evidence for rising global temperatures.

“There is a great deal of consternation among a lot of us over the readjustment of data that is going on and some of the portrayals that we are seeing,” Mr. Bastardi said in a video segment posted recently on AccuWeather’s Web site.

Such skepticism appears to be widespread among TV forecasters, about half of whom have a degree in meteorology. A study released on Monday by researchers at George Mason University and the University of Texas at Austin found that only about half of the 571 television weathercasters surveyed believed that global warming was occurring and fewer than a third believed that climate change was “caused mostly by human activities.”

More than a quarter of the weathercasters in the survey agreed with the statement “Global warming is a scam,” the researchers found.

The split between climate scientists and meteorologists is gaining attention in political and academic circles because polls show that public skepticism about global warming is increasing, and weather forecasters — especially those on television — dominate communications channels to the public. A study released this year by researchers at Yale and George Mason found that 56 percent of Americans trusted weathercasters to tell them about global warming far more than they trusted other news media or public figures like former Vice President Al Gore or Sarah Palin, the former vice-presidential candidate.

The George Mason-Texas survey found that about half of the weathercasters said they had discussed global warming on their broadcasts during chats with anchors, and nearly 90 percent said they had talked about climate change at live appearances at Kiwanis Club-type events.

Several well-known forecasters — including John Coleman in San Diego and Anthony Watts, a retired Chico, Calif., weatherman who now has a popular blog — have been vociferous in their critiques of global warming.

The dissent has been heightened by recent challenges to climate science, including the discovery of errors in the 2007 report by the United Nations’ Intergovernmental Panel on Climate Change and the unauthorized release of e-mail messages from a British climate research center last fall that skeptics say show that climate scientists had tried to suppress data.

“In a sense the question is who owns the atmosphere: the people who predict it every day or the people who predict it for the next 50 years?” said Bob Henson, a science writer for the University Corporation for Atmospheric Research, who trained as a meteorologist and has followed the divide between the two groups.

Mr. Henson added, “And the level of tension has really spiked in recent months.”

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