NYT -Panel Sees Centuries of Warming Due to Humans
By ELISABETH ROSENTHAL and ANDREW C. REVKIN
Panel Says Humans ‘Very Likely’ Cause of Global Warming
By THE ASSOCIATED PRESS Filed at 6:34 a.m. ET
NYT - Panel Sees Centuries of Warming Due to Humans
By ELISABETH ROSENTHAL and ANDREW C. REVKIN PARIS, Feb. 2 – The world is already committed to centuries of warming, shifting weather patterns and rising seas from the atmospheric buildup of smokestack and tailpipe gases that trap heat, but warming can be substantially blunted with prompt action, an international network of climate experts said today.
In a report released here today, the group, the Intergovernmental Panel on Climate Change of the United Nations, in its fourth assessment since 1990 of the causes and consequences of climate change, for the first time expressed with near certainty – more than 90 percent confidence – that carbon dioxide and other heat-trapping greenhouse gases were the main drivers of warming since 1950.
In its last report, in 2001, the panel, consisting of hundreds of scientists and reviewers, put the confidence level at between 66 and 90 percent. Both reports are online at http://www.nytimes.com/2007/02/02/science/earth/www.ipcc.ch.
Should the concentration of carbon dioxide reach twice the pre-industrial average of 280 parts per million, the report said, the climate will likely warm some 3.5 to 8 degrees Fahrenheit, and there would be more than a one in 10 chance of much greater warming – a situation many earth scientists say poses an unacceptable risk .... full text