“From 1880 to about 1940 the world — particularly the Northern Hemisphere — went through a period of significant warming,” I heard from tall, quiet-spoken Dr. J. Murray Mitchell, Jr., of the National Oceanic and Atmospheric Administration (NOAA); he is one of this nation’s most respected climatologists. He went on: “But since about 1940, there has been a distinct drop in average global temperature. It’s fallen about half a degree Fahrenheit — even more in high latitudes of the Norther Hemisphere.”
England’s annual growing season shrank by nine of ten days between 1950 and 1966, Hubert Lamb has noted. In the northern tier of the U.S. Midwest, summer frosts again occasionally damage crops.
Sea ice has returned to Iceland’s coasts after more than forty years of virtual absence.
“During the last 20 to 30 years, world temperature has fallen, irregularly at first but more sharply over the last decade.” — U.S. National Science Board, 1974
Glaciers in Alaska and Scandinavia have slowed their recession; some in Switzerland have begun advancing again.
Source: National Geographic