Part 3/6:
In the northern hemisphere, the presence of extensive landmasses and complex topography influences atmospheric dynamics, leading to the generation of Rossby waves—large-scale planetary waves that significantly affect the vortex. These waves tend to destabilize and disrupt the Arctic vortex more frequently, causing it to migrate and weaken. Conversely, the southern hemisphere’s vortex remains relatively stable because of its more uniform, ocean-dominated landscape, which confines the vortex primarily over Antarctica with less frequent disruptions.