Word: warms
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Dates: during 1990-1999
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While those in the city business community are warm to the idea, more liberal city leaders seem skeptical...
Such jobs are not the routine summer fare for Harvard Law students. Traditionally, the future attorneys spend the warm months working someplace more like "The Firm"'s Bendini, Lambert, and Locke...
There is a growing understanding as well that ice ages are not uniformly icy, nor interglacial periods unchangingly warm. About 40,000 years ago, for example, right in the middle of the last Ice Age, the world warmed briefly, forcing glaciers to retreat. And while the current interglacial period has been stably temperate, the previous one, according to at least one study, was evidently interrupted by frigid spells lasting hundreds of years. If that period was more typical than the present one, humanity's invention of agriculture, and thus civilization, may have been possible only because of a highly unusual...
...years, an episode known as the Younger Dryas period. The periodic "spikes" of warmer weather that have interrupted ice ages and the cold weather that often came on suddenly in the last interglacial period are also impossible to explain with astronomy. And so is the astonishingly rapid changeover from warm to cold...
...this current, argue Broecker and Denton, that keeps the Arctic relatively warm and glacier free. When it stops running, an ice age -- or a cold spike -- begins. What causes a turnoff? An influx of fresh water might do it, by diluting the saltiness and density of the current, preventing it from sinking and heading back to the tropics. There is evidence that at just the time the Younger Dryas began, a huge North American lake (which no longer exists) began dumping Amazonian quantities of fresh water into the North Atlantic. The discharge stopped about 1,000 years later...