Scientist at New York University have added another wrinkle to the contentious topic of climate change…
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Rapid warming along the Antarctic Peninsula and puzzling shifts in the distribution and extent of winter sea ice at the bottom of the world appear to have their roots in a natural climate swing centered in the tropical Atlantic, according to a new study by researchers at New York University.
The warming of the region is of concern because of its implications for sea-level rise, while the shifting and slight increase in winter sea ice has become a favorite talking-point among many of global warming’s political skeptics.
The climate swing the researchers discussed, known as the Atlantic Multidecadal Oscillation (AMO), shows up as a cycle of warmer, then colder-than-normal sea-surface temperatures. The cycle repeats itself once every 40 to 80 years or so, with cooler or warmer temperatures lasting for periods of 20 to 40 years or more.