Den arktiska oscillationen, AO

När AO har ett positivt värde ligger jetströmmen (en kraftig vind på hög höjd) ofta i ett nordligare läge  då det är allmänt lågtrycksbetonat vid nordpolen. 

När AO är negativ, ligger jetströmmen ofta sydligare till följd av att högtryck dominerar över nordpolen.

Hur pass stark eller svag den stratosfäriska polarvirveln är kan påverka vad vi får för väder under vintern

https://www.svt.se/vader/det-har-ar-den-stratosfariska-polarvirveln



 

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