Introduction: General Awareness and Concern
In the 1970s, there was increasing awareness that estimates of global temperatures showed cooling since 1945. Of those scientific papers considering climate trends over the 21st century, only 10% 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 climate change from greenhouse gases 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.
Currently there are some concerns about the possible regional cooling effects of a slowdown or shutdown of thermohaline circulation, which might be provoked by an increase of fresh water mixing into the North Atlantic due to glacial melting. The probability of this occurring is generally considered to be very low, and the IPCC notes, "even in models where the THC weakens, there is still a warming over Europe. For example, in all AOGCM integrations where the radiative forcing is increasing, the sign of the temperature change over north-west Europe is positive."
Read more about this topic: Global Cooling
Famous quotes containing the words general, awareness and/or concern:
“The esteem of good men is the reward of our worth, but the reputation of the world in general is the gift of our fate.”
—François, Duc De La Rochefoucauld (1613–1680)
“During the first formative centuries of its existence, Christianity was separated from and indeed antagonistic to the state, with which it only later became involved. From the lifetime of its founder, Islam was the state, and the identity of religion and government is indelibly stamped on the memories and awareness of the faithful from their own sacred writings, history, and experience.”
—Bernard Lewis, U.S. Middle Eastern specialist. Islam and the West, ch. 8, Oxford University Press (1993)
“Mr. [Christopher] Smart the poet was here yesterday.... This ingenious writer is one of the most unfortunate of men—he has been twice confined in a mad house.... How great a pity so clever, so ingenious a man should be reduced to such shocking circumstances. He is extremely grave, and has still great wildness in his manner, looks and voice—’tis impossible to see him and to think of his works, without feeling the utmost pity and concern for him.”
—Frances Burney (1752–1840)