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Melting Sea Ice
An area twice the size of Texas has melted away since 1979 (over 20% decrease). (National Snow and Ice Data Center 2005)
2003
Ice 40% thinner. (Rothrock,D.A, et al. 1999)
Source ACIA, 20 Jennifer Allen Animations
Global Warming: The Greatest Threat © 2006 Deborah L. Williams
ARCTIC SEACE AREA
1979-2005
Ice only 6 – 9 feet thick at North Pole (NOAA FAQ 2007).
Arctic Sea Ice Extent (millions of sq. km.)
Northwest passage opened Aug 21, 2007
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Source: NSIDC, 2005
1978 1983 1988 1993 1998 2003 2005 Slide from: http://panda.unm.edu/Courses/Morrison/Astro 101.002 Spring10/lectures/Lecture%208%20earth.ppt
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