By Michael Bastasch
A study meant to debunk a claim made by Environmental Protection Agency (EPA) Administrator Scott Pruitt in his confirmation hearing ended up doing the opposite — it proved him right.
The study, published Thursday in the journal Nature, found that Pruitt’s claim of a “leveling off of warming” over the past two decades is unsupported by satellite-derived temperature data, which measures the lowest few miles of the atmosphere.
Researchers supposed debunking of Pruitt, however, centers on a selectively quoted line from his testimony, which cuts out the administrator’s reference to the global warming “hiatus.”
Scientists have been debating the “hiatus” in warming for years, trying to parse out its causes and, in some cases, if it’s due to bad measurements in surface temperature readings. But the “hiatus” is extremely apparent in satellite temperature readings, stretching for about two decades.“Mr. Pruitt claimed that ‘over the past two decades satellite data indicates there has been a leveling off of warming,’” reads the study, quoting Pruitt’s confirmation hearing testimony from January.
But Pruitt actually said: “over the past two decades satellite data indicates there has been a leveling off of warming, which some scientists refer to as the ‘hiatus.’”
Pruitt was clearly referring to the “hiatus,” or lack of significant warming, in the satellite temperature record that started in the late 1990s and continued until the recent El Nino began in 2015.
“This study seems to be an unwarranted kneejerk reaction to Pruitt’s ‘leveling off’ of warming comment,” Dr. Roy Spencer, a climate scientist who operates one of the satellite datasets relied upon by the study, told The Daily Caller News Foundation.
“But Pruitt’s comment in testimony wasn’t that precise, and it’s true that the previous warming became much weaker and approached zero over a period of approximately 20 years until the 2015-16 warm El Nino event,” Spencer said.
Pruitt has come under attack from environmentalists and some scientists for his comments on global warming. Most recently, opponents criticized Pruitt for saying that he didn’t believe carbon dioxide was the main driver of recent warming.
Major media outlets, including The Washington Post, picked up this new study’s results, criticizing Pruitt and his management at the EPA. WaPo reported, “Scientists just published an entire study refuting Scott Pruitt on climate change.”
Meteorologist Ryan Maue pointed out on Twitter that data presented in the study shows a slowdown in warming in the last 20 years. Maue also noted how authors used several studies on the “hiatus” in their citations, but refused to use the term in the study.
The study’s authors used climate models to show the warming trend in satellite data couldn’t be explained by natural warming, which excludes man-made greenhouse gases.