Final answer:
The Coriolis effect causes winds in each hemisphere to blow in opposite directions, resulting in counterclockwise circulation in the Northern Hemisphere and clockwise circulation in the Southern Hemisphere. This phenomenon explains the extensive shear and turbulence at the boundaries between the hemispheres.
Step-by-step explanation:
The phenomenon described in the question is known as the Coriolis effect. The Coriolis force causes winds in each hemisphere to blow in opposite directions due to the rotation of the Earth. In the Northern Hemisphere, winds are deflected to the right, resulting in counterclockwise circulation around low-pressure zones. In the Southern Hemisphere, winds are deflected to the left, leading to clockwise circulation. These opposite wind patterns create extensive shear and turbulence at the boundaries between the two hemispheres.