Geography of Senior One: What does the wind direction of cyclone mean? Is it the overall moving direction?

Clockwise is from east to west, called anticyclone.

Counterclockwise is from west to east, called cyclone.

(only in the northern hemisphere, the opposite is true in the southern hemisphere. But because there is no land in the southern hemisphere, this phenomenon (actually a typhoon) is relatively rare. )

In the northern hemisphere, the earth rotates from west to east (that is, from left to right, the arrow points to the right)

Imagine if the earth is still and the air is still. But if the earth rotates to the right, then the air in that position is equivalent to shifting to the left. It's similar to the principle of inertia. Just like a car suddenly goes forward, you will lean back.

Just use a chart to show it.

Draw a cross, the line facing north (above) represents the air or wind direction at rest, and draw a line at the intersection point where the upper left corner bends outward (the farther away from the original straight line facing north) is the wind direction in the northern hemisphere.

Why is it not a straight line pointing directly to the west but a curve deviating to the west? Because air doesn't go directly to the left (west). Because the linear velocity of each latitude is different. It doesn't matter if you don't understand this, just remember the picture above. . Like the car phenomenon in the picture above, why lean back instead of lying flat?

This curve is a cyclone from west to east, counterclockwise. Cyclones appear on the surface. An anticyclone appeared in the sky.

The southern hemisphere is the opposite.

In addition, ocean currents are also against the wind. Cyclones in the northern hemisphere are counterclockwise, but ocean currents are clockwise. Of course, the southern hemisphere is the opposite. But because there is little land in the southern hemisphere, many ocean currents flow in a straight line.