This time we are looking on the crossword puzzle clue for: Cold period.
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Random information on the term “Cold period”:
Global cooling was a conjecture, especially during the 1970s, of imminent cooling of the Earth culminating in a period of extensive glaciation, due to the cooling effects of aerosols and orbital forcing. Some press reports in the 1970s speculated about continued cooling; these did not accurately reflect the scientific literature of the time, which was generally more concerned with warming from an enhanced greenhouse effect.
Although the global temperature series available at the time suggested that the temperature had decreased for several decades up to the mid-70s, as additional data became available through time, the global temperature series demonstrated significant increases over the next decades, which falsified the conjecture.
By the 1970s, scientists were becoming increasingly aware that estimates of global temperatures showed cooling since 1945, as well as the possibility of large scale warming due to emissions of greenhouse gases. In the scientific papers which considered climate trends of the 21st century, less than 10% were inclined towards future cooling, while most papers predicted future warming. The general public had little awareness of carbon dioxide’s effects on climate, but Science News in May 1959 forecast a 25% increase in atmospheric carbon dioxide in the 150 years from 1850 to 2000, with a consequent warming trend. The actual increase in this period was 29%. Paul R. Ehrlich mentioned global warming from greenhouse gases as a counterforce to the cooling effect of aerosols in 1968. By the time the idea of global cooling reached the public press in the mid-1970s temperatures had stopped falling, and there was concern in the climatological community about carbon dioxide’s warming effects. In response to such reports, the World Meteorological Organization issued a warning in June 1976 that “a very significant warming of global climate” was probable.