In the Southern Hemisphere, the Northwesterlies blowing along the 40°S latitudinal belt are called "Roaring Forties," while the Northwesterlies along 50°S latitudinal belt are called "Furious Fifties," and Northwesterlies along 60°S latitudinal belt are called "Shrieking Sixties." Why do these winds blow at high speeds in these higher latitudes in the Southern Hemisphere? (3 points)