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Globalwarming에 대해서...목차
Global Warming OverviewThe Evidence in Alaska
Global Cataclysmic Concerns
What We Can Do
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The Greatest Threat“Climate change is the most severe problem that we are facing today.”
Sir David King
Former Chief Scientist for the UK Government
Photo The Age, Melbourne. All rights reserved
Global Warming: The Greatest Threat 2006 Deborah L. Williams
Photo: Amanda Byrd/Canadian Ice Service
“There is no doubt in my mind that climate change is one of the greatest threats facing humanity today.”
Markku Niskala
Secretary-General of the Red Cross
January 2008
The Greatest hreat
Tony Weyiouanna, Sr. photo
“Global warming is a brutal and urgent reality...the greatest threat hanging over the future of mankind.”
Former French President Jacques Chirac
“A great nation like the United States has the duty to not obstruct the fight against global warming but, on the contrary, to head this struggle because what is at stake is the future of all humanity.”
French President Nicolas Sarkozy
Despite overall cooler summer temperatures, the 2008 minimum extent is only 390,000 square kilometers (150,000 square miles), or 9.4%, more than the record-setting 2007 minimum. The 2008 minimum extent is 15.0% less than the next-lowest minimum extent set in 2005 and 33.1% less than the average minimum extent from 1979 to 2000.
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n more dramatic decrease in 2008 compared to average conditions. Ice age is a good indicator of general ice thickness, with older ice thicker on average than younger ice. First-year ice generally ranges between about 3-5 feet thick, while multiyear ice averages about 8-10 feet; old ice that has survived several melt seasons can easily be 12-15 feet thick. High resolution image Credit: NSIDC, Courtesy S. Drobot, University of Colorado, Boulder
Figure 6 Time series of ice age showing the proportional composition of the total ice area covered by ice of different ages. Multiyear (2-5 year old and 6+ year old, green and blue colors) ice once covered over 50 percent of the Arctic, but in 2008 accounts for less than 30 percent. Old ice (in blue) once covered over 20 percent of the area of the Arctic, but now only covers about 6 percent. The