Once again, is it hype or is it scientific reality?
A good candidate for the last previous opening of the Northwest Passage was the period 5,000-7,000 years ago, when the Earth's orbital variations brought more sunlight to the Arctic in summer than at present. Prior to that, the Passage was probably open during the last inter-glacial period, 120,000 years ago. Temperatures then were 2-3 degrees Centigrade higher than present-day temperatures, and sea levels were 4-6 meters higher.
Yes, the Northwest Passage is open for the first time European recorded history (Eskimos don't have calendars). But that is best case only 500 years to draw on - a lot of time if human intervention scales are at question, but not a lot of time in solar/earth orbital terms.
http://www.wunderground.com/blog/Jef...&tstamp=200710
Lest you think Dr. Masters is a Republican plant:
Jeffrey Masters, Ph.D.
Director of Meteorology
Jeff Masters grew up in suburban Detroit, and attended the University of Michigan, where he received his B.S. and M.S. degrees in Meteorology in 1982 and 1983, respectively. While working on his Masters degree, he participated in field programs studying acid rain in the Northeast U.S. and air pollution in the Detroit area.
Every train must have a Caboose - that's the part that comes clicking across the tracks at the brow of the hill, after the engine and forward cars are already traveling across the bottom of the next valley.

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