Changing Climate

At the 1989 AGU meeting, NOAA’s Tom Karl said most global warming occurred before 1919 and earth cooled from 1921 to 1979

“Analysis of warming since 1881 shows most of the increase in global temperature happened before 1919 — before the more recent sharp rise in the amount of carbon dioxide in the atmosphere, said Thomas Karl, of the National Oceanic and Atmospheric Administration’s National Climate Data Center in Asheville, N. C.

While global climate warmed overall since 1881, it actually cooled from 1921 to 1979, Karl said.

“In spite of all the well-publicized concern about global warming, you must understand that there is still considerable uncertainty among scientific experts about a number of critical factors which determine global warming,” NOAA administrator John Knauss said in a statement issued for the geophysics meeting.”