ice age (Page 4)

A study of North Atlantic ice suggests that the brightening and dimming of the sun may cause a 1,500-year cycle of cooling and warming on parts of the Earth. Researchers have found that a very slight difference in the amount of solar energy reaching the Earth can have a powerful effect on the climate. As ice builds up in lands bordering the North Atlantic, the average temperature drops in Europe and North America.

Gerard C. Bond, a researcher at the Lamont-Doherty Earth Observatory of Columbia University in Palisades, New York, says, ?Whether the whole Earth is affected, we don?t know for sure yet, but it is certainly implied. The effect does extend from the high northern latitudes down, maybe even to the tropics.?
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