Answer:
Step-by-step explanation:
Polar vortex are the cyclones that develops at poles in winter season. They span around for 1000 square kilometers they are formed in uppee tropospheric region. Polar night jet streams are development having circular moment.
Rossby waves can disrupt the circulation around the polar vortex and polar vortex breaks and drives chilling artic air towards south .
That have happened in USA in 2014 whereby because of polar vortex chilling air there was a intense cold in that region