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Fluctuating jet stream may be causing extreme weather events

Fluctuating jet stream may be causing extreme weather events

Researchers at the University of Arizona and the Swiss Federal Research Institute attempted to put recent Northern Hemisphere polar jet stream anomalies and their link to extreme weather events into a historical perspective by studying two tree-ring records from the British Isles and the northeastern Mediterranean.

There is a discussion in scientific circles over whether an increased variability of the jet stream is linked to According to research by a University of Arizona-led team , an increase in fluctuations in the North Atlantic jet stream since the 1960s coincide with more extreme weather events in Europe such as heat waves, droughts, wildfires, and flooding.Researchers at the University of Arizona and the Swiss Federal Research Institute attempted to put recent Northern Hemisphere polar jet stream anomalies and their link to extreme weather events into a historical perspective by studying two tree-ring records from the British Isles and the northeastern Mediterranean.

The polar jet flows over the middle to northern latitudes of North America, Europe, and Asia and their intervening oceans.When the North Atlantic Polar Jet is in the extreme northern position, the British Isles and western Europe have a summer heat wave while southeastern Europe has heavy rains and flooding, the researchers said.

What we're experiencing now in North America is part of the same jet stream system," Trouet said.Trouet adds that the extreme cold and snow in the North American Northeast and extreme warmth and dryness in California and the American Southwest are all related to the position of the North Pacific Polar Jet.There is a discussion in scientific circles over whether an increased variability of the jet stream is linked to man-made global warming and the faster warming of the Arctic compared to the tropics.

More about Jet stream, Europe, extreme weather events, Climate change, Dendrochronology Jet stream Europe extreme weather even...

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