Arctic data show recent global warming is NOT due to natural causes

Science of Global Warming, Climate Change:

Arctic data show recent global warming is NOT due to natural causes

Published:
Updated: September 3, 2010, 5:51 pm
Topics: Science of Global Warming, Climate Change The Contrarians? Short essay Significant Climate Papers News: Climate Change, Global Warming Latest News

Arctic sediments show that 20th century warming is unlike natural variation

PNAS paper indicates that changes since the middle of the 20th century are unprecedented

"The 20th century is the only period during the past 200 millennia in which aquatic indicators reflect increased warming, despite the declining effect of slow changes in the tilt of the Earth's axis which, under natural conditions, would lead to climatic cooling."