CLIMATE SCIENCE IN 1974 FROM USA REPORT

Here is a summary of an article written in a Report in 1974:

Annual average temperatures over the Northern Hemisphere increased rather dramatically from 1890 to 1940, but have been falling ever since. The total change (by1974) has averaged about 0.5 degrees Centigrade, with the greatest cooling in higher latitudes. Iceland's hay crop has dropped by 25% since the 1950's, while pack ice in waters around Iceland and Greenland ports is becoming the hazard to navigation it was in the 17th and 18th centuries.

From 1890 to 1940 man enjoyed the warmest climate the world had known for 5 or 6 centuries. Dr. Reid Bryson, Director of the University of Wisconsin's Institute for Environmental Studies, thinks that the relatively warm period from 1890 to 1940 was only a brief intermission in the Little Ice age, a perid of worldwide expansion of snow cover, mountain glacier growth, and Arctic pack ice which began in the 15th century and became pronounced by the 17th century. There were three major glacial advances in the Alps, Norway, Iceland and Alaska and elsewhere around 1650, 1750 and 1850 separated by slight withdrawals. Average annual temperatures in England and perhaps worldwide were 1 to 2 degrees Centigrade colder than they were before or since (as at 1974). In the USA average Midwestern temperatures in the 1850's were as much as 4 degrees C. colder than they are in 1974.  

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 NOAA & Global Cooling In The 1970s | NOT A LOT OF PEOPLE KNOW THAT