In the December 15, 1977 issue of Nature, it was reported that atmospheric temperatures in the Northern Hemisphere had cooled about 1C.
“An international team of specialists has concluded from eight indexes of climate that there is no end in sight to the cooling trend of the last 30 years, at least in the Northern Hemisphere.”
The cooling shown for ATM 0-90 N was about 1C
New data on climatic trends | Nature
Almost all of this cooling was erased in Michael Mann’s hockey stick, but is present in Briffa’s reconstruction.
