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World temperatures highest in 1200 years Rhett A. Butler, mongabay.com February 10, 2006 World temperatures are higher than in any period over the last 1,200 years, according to a study published in the current issue of Science. "Our results show that, during the late 20th century, warming affected the entire northern hemisphere and that at no point in the past 1,000 years has the northern hemisphere experienced the same widespread warming," said Dr. Timothy Osborn, co-author of the study. Their research showed significant warmth in the Northern Hemisphere from 890-1170 A.D. follwed by colder periods from 1580-1850, the period known as the "little ice age". The scientists said the present warm phase is longest temperature anomaly since the 9th century.
Their study follws research published last November which found that atmospheric dioxide levels are presently at the highest in 650,000 years. Another study, released earlier this year by NASA, found that 2005 was the warmest year on record.
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