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How the Arctic Oscillation Can Ruin a Seasonal Forecast

24th April 2013 | Joel Gratz

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A positive Arctic Oscillation on the left creates a stronger whirlpool of air around the north pole which keeps the colder air locked up to the north. A negative Arctic Oscillation on the right features a weaker whirlpool of air and allows colder air to flow south into the U.S. and create conditions ripe for snow. (Credit: J. Wallace, University of Washington).

A positive Arctic Oscillation on the left creates a stronger whirlpool of air around the north pole which keeps the colder air locked up to the north. A negative Arctic Oscillation on the right features a weaker whirlpool of air and allows colder air to flow south into the U.S. and create conditions ripe for snow. (Credit: J. Wallace, University of Washington).

A positive Arctic Oscillation on the left creates a stronger whirlpool of air around the north pole which keeps the colder air locked up to the north. A negative Arctic Oscillation on the right features a weaker whirlpool of air and allows colder air to flow south into the U.S. and create conditions ripe for snow. (Credit: J. Wallace, University of Washington).

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