Floods, gales, big freeze - blame the jet stream
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Volatile weather conditions in northern Europe, the United States and Canada have been worsened by what meteorologists call the jet stream, fuelled partly by the temperature differential between the Arctic and the mid-latitudes. The observation could be as a result of the recent warming of the Arctic. Helen Brown, a forecaster at the Met Office in the UK, explains how the jet stream has contributed to recent turbulent weather.