In 1998, Michael Mann discovered something nobody knew before – earth had been cooling for 900 years and then suddenly began warming up out of control in the year 1910.
Climate Change 2001: The Scientific Basis
Academics later extended the graph to show that temperatures were the hottest in tens of thousands of years.
Scientists extend and straighten iconic climate “hockey stick” | Ars Technica
Mann observed that earth was burning up at a time when no one else was aware of it.
Briffa et al. series for IPCC figure
The authors of the 1995 IPCC Report were unaware of it.
The authors of the 1990 IPCC Report were unaware of it.
In 1989, Tom Karl and NOAA were unaware of it.
“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.”
07 Dec 1989, 44 – The Tyler Courier-Times at Newspapers.com
NCAR was unaware of it.
21 Jul 1974, 13 – The Des Moines Register at Newspapers.com
Science News was unaware of it.
Forty-two top American and European investigators were unaware of it.
THE ROLE OF NOAA’S CLIMATE PREDICTION CENTER IN THE DEVELOPMENT OF CLIMATE SERVICES
NASA was unaware of it.
U.S. Scientist Sees New Ice Age Coming
The National Academy of Sciences was unaware of it.
The press was unaware of it.
TIME Magazine Archive Article — Another Ice Age? — Jun. 24, 1974
March 2, 1975 – B-r-r-r-r: New Ice Age on way soon? | Chicago Tribune Archive
U.S. and Soviet Press Studies of a Colder Arctic – The New York Times
29 Jan 1974, 5 – The Guardian at Newspapers.com
The CIA and their affiliates posing as journalists were unaware of it.
10 May 1979, 7 – Calgary Herald at Newspapers.com
Sea ice was unaware of it.
U.S. and Soviet Press Studies of a Colder Arctic – The New York Times
Ice was unaware in 1923 that it was the coldest period of the last 10,000 years.
29 Dec 1923, Page 5 – at Newspapers.com
NOVEMBER, 1922. MONTHLY WEATHER REVIEW
Reports from fishermen, seal hunters, and explorers who sail the seas about Spitsbergen and the eastern Arctic, all point to a radical change in climatic conditions, and hitherto unheard-of high temperatures in that part of the earth’s surface.
Many old landmarks are so changed as to be unrecognizable. Where formerly great masses of ice were found, there are now often moraines, accumulations of earth and stones. At many points where glaciers formerly extended far into the sea they have entirely disappeared.
formerly the waters about Spitsbergen held an even summer temperature of about 3° Celsius; this year recorded temperatures up to 15°, and last winter the ocean did not freeze over even on the north coast of Spitsbergen.
Ice was also unaware that temperatures 5,000 years ago were much colder.
Less Ice In Arctic Ocean 6000-7000 Years Ago — ScienceDaily
Holocene Treeline History and Climate Change Across Northern Eurasia – ScienceDirect
