(p. A10) Scientists have long labored to explain what appeared to be a slowdown in global warming that began at the start of this century as, at the same time, heat-trapping emissions of carbon dioxide were soaring. The slowdown, sometimes inaccurately described as a halt or hiatus, became a major talking point for people critical of climate science.
Now, new research suggests the whole thing may have been based on incorrect data.
When adjustments are made to compensate for recently discovered problems in the way global temperatures were measured, the slowdown largely disappears, the National Oceanic and Atmospheric Administration declared in a scientific paper published Thursday. And when the particularly warm temperatures of 2013 and 2014 are averaged in, the slowdown goes away entirely, the agency said.
. . .
The Cato Institute, a libertarian think tank in Washington that is critical of climate science, issued a statement condemning the changes and questioning the agency’s methodology.
“The main claim by the authors that they have uncovered a significant recent warming trend is dubious,” said the statement, attributed to three contrarian climate scientists: Richard S. Lindzen, Patrick J. Michaels and Paul C. Knappenberger.
However, Russell S. Vose, chief of the climate science division at NOAA’s Asheville center, pointed out in an interview that while the corrections do eliminate the recent warming slowdown, the overall effect of the agency’s adjustments has long been to raise the reported global temperatures in the late 19th and early 20th centuries by a substantial margin. That makes the temperature increase of the past century appear less severe than it does in the raw data.
“If you just wanted to release to the American public our uncorrected data set, it would say that the world has warmed up about 2.071 degrees Fahrenheit since 1880,” Dr. Vose said. “Our corrected data set says things have warmed up about 1.65 degrees Fahrenheit. Our corrections lower the rate of warming on a global scale.”
For the full story, see:
JUSTIN GILLIS. “Global Warming ‘Hiatus’ Challenged by NOAA Research.” The New York Times (Fri., JUNE 5, 2015): A10.
(Note: ellipsis added.)
(Note: the online version of the story has the date JUNE 4, 2015.)
The scientific article mentioned in the passages quoted above, is:
Karl, Thomas R., Anthony Arguez, Boyin Huang, Jay H. Lawrimore, James R. McMahon, Matthew J. Menne, Thomas C. Peterson, Russell S. Vose, and Zhang Huai-Min. “Possible Artifacts of Data Biases in the Recent Global Surface Warming Hiatus.” Science 348, no. 6242 (June 26, 2015): 1469-72.