The effect of rotation Why the vortex in the Northern Hemisphere and the rotation of the typhoon are

As for the direction of the water vortex, it is said that the northern hemisphere is counterclockwise and the southern hemisphere is just the opposite, due to the geostrophic deflection. Is this true?

Let's first look at what the geostrophic bias is: due to the rotation of the earth, there is a rotational bias in the motion of objects. Objects moving horizontally on the Earth, regardless of which direction they move, are deflected, to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

For example, suppose there is an object in the Northern Hemisphere at point a, and it moves north along the meridian towards point B, and there is an observer at point B, and if the Earth does not rotate, then this observer will see that the object has reached his position in the direction of motion; But the earth is a rotating sphere, then the rotation of point b through the earth is equivalent to moving from meridian 1 to meridian 2, because the meridians of the earth are not parallel, so the direction of point b at meridian 2 changes relative to the direction at meridian 1, forming an angle (you can look at the globe, you will find that the direction of the two meridians is angled) but the object still moves along the direction of the original meridian due to inertia, so when it moves to the destination, The observer at point B sees that the object is moving to his right.

Similarly, since the parallels are not flat on the plane, objects that move in the northern hemisphere will also be biased to the right; In the Southern Hemisphere, the situation is reversed.

It is only at the equator that there is no geostrophic deflection because the meridians and parallels are parallel in the plane.

Therefore, many means of transportation, such as airplanes and ships, must often adjust their course when sailing, otherwise they will deviate to the right side of the destination.

The influence of geostrophic deflection is very obvious, which is the main cause of atmospheric movement. Cyclones and anticyclones, which are important weather features on Earth, require geostrophic deflection to form. Geostrophic deflection is also one of the main reasons for the formation of storms, one of the main reasons for the formation of trade winds in different latitude zones, and one of the main reasons for the formation of monsoons.

Geostrophic deflection is also one of the main reasons for the formation of ocean currents. Ocean currents are affected by geostrophic deflection and deflection in the process of flow, gradually forming a circulation, so that the earth's seawater heat and components can be exchanged, and the balance of global heat and water is maintained. The circulation in the Northern Hemisphere is clockwise, and the circulation in the Southern Hemisphere is counterclockwise.

Therefore, geostrophic deflection only has an effect on water flow on a large scale.

However, for the water vortex, scientists have said that it has nothing to do with the geotropic bias, the geostrophic deflection is not able to affect the formation of water vortexes, and the movement direction and mode of existence of the water vortex on the earth are only related to the geomorphological characteristics; In the case of sewers, it has nothing to do with the structure and temperature of the sewers, but not with the rotation of the earth, so it is a fallacy that the direction of the water vortex in the northern and southern hemispheres is reversed, that is, whether in the southern or northern hemispheres, the direction of the water vortex may be clockwise or counterclockwise.

The vortex is not caused by the Coriolis force (geostrophic deflection force), the vortex is only related to the size of the hole in the flowing water.

Not all typhoons rotate counterclockwise. If you are in the Northern Hemisphere, you will usually see typhoons in the Northern Hemisphere in the weather forecast. Typhoons in the Northern Hemisphere rotate counterclockwise, while typhoons in the Southern Hemisphere rotate clockwise.

If the Earth does not rotate, then the wind will simply blow from the high pressure area to the low pressure area. Since the Earth rotates, when warm air rises, it is subjected to a "geostrophic deflection force" (technically also known as a "Coriolis force").

For example, if you try to draw a straight line on a rotating disk, you end up with a curve. Since the direction of the geostrophic deflection force is exactly opposite in the northern and southern hemispheres, the wind moves counterclockwise around the low pressure region in the northern hemisphere and clockwise around the low pressure region in the southern hemisphere.

In addition to influencing the direction of rotation of a typhoon, geostrophic deflection forces have also been found to be very interesting: the right rail of trains in northern hemisphere countries is always slightly more worn than the left rail.

The reason is that when the train is running, it will be affected by the geostrophic deflection force to the right, so the pressure on the right rail is a little greater than that on the left rail, so the wear is of course more severe.

You may not understand this kind of thing, but you will know it when you see it with your own eyes.

First of all, LZ is in the Northern Hemisphere, right? Haha, and then there was a sink when you got home, right? You know the sink for washing dishes, right?

Plug the drain and then store the water, and when you have a certain amount of water (such as 10cm deep, or a little more), you can open the drain, and then pay attention to whether the direction of the water flow at the drain is counterclockwise or clockwise. You get the idea. (The more water is stored, the more obvious the observation effect, if there can be a little colored impurity, you can observe the direction of water rotation more clearly).

The same goes for typhoons.

The reason for the above two is that the cause of the rotation of the earth is sometimes more understandable by observing it yourself than by reading the text. If LZ had had had a chance to go to the southern hemisphere, another experiment would have been observed.

Because typhoons belong to cyclonic systems, i.e., low-pressure systems. The air pressure in the center of the low-pressure system is low, the air pressure around is high, and the air is directed from high pressure to low pressure in the horizontal direction, that is, from the surrounding to the center. The wind in the Northern Hemisphere, influenced by a horizontal geostrophic deflection force (Coriolis force), deflects to the right, forming a cyclone that rotates counterclockwise.

Because it is a geostrophic deflection force, the north is against the south.

1.Counterclockwise.

2.From south to north.

Correct Answer: Counterclockwise.

On Earth, the movement of the air flow is affected by the geostrophic deflection force, which will cause the direction of the air flow to shift consistently, and it is possible to form a low pressure area within the Ru clan god, and when the scale is large enough, a typhoon will form.

Because the geostrophic deflection force in the northern and southern hemispheres is a fixed spike row, an interesting phenomenon will be formed: (1) typhoons in the northern hemisphere rotate counterclockwise; (2) The slag in the southern hemisphere rotates clockwise;

Rotate in a counterclockwise direction. A typhoon is a tropical depression vortex in which the central airflow of the depression flows from the surrounding area to the center of the depression. In the Northern Hemisphere, due to the coincidental influence of the geostrophic deflection force, the airflow from the surrounding area to the center of low pressure deviates to the right, forming a whirlpool rotating in a counterclockwise direction.

Causes of typhoon formation:

Typhoons originate in tropical seas, where temperatures are high and large amounts of seawater are evaporated into the air, creating a center of low pressure. As the air pressure changes and the earth moves itself, the incoming air also rotates, forming a whirlpool of air that rotates counterclockwise, which is a tropical cyclone. As long as the temperature does not drop, this tropical cyclone will become more and more powerful, and eventually a typhoon will form.

Steering Influencing Factors:

The dynamics that determine the movement of a typhoon can be divided into two types: internal and external. The internal force core of a typhoon is mainly caused by the geostrophic deflection force associated with the rotation, air flow convergence and upward motion of the typhoon itself. The magnitude of the typhoon's internal force is directly proportional to the radius of the typhoon, the convergence and upward motion of the air in the vortex, and the magnitude of the tangential wind, and inversely proportional to the latitude where the typhoon center is located.

Under the action of simple internal forces, the trajectory of the typhoon center is a complex cycloid composed of superimposed sine waves and cosine waves with different amplitudes and the same period. The external forces of a typhoon mainly include the pressure gradient force of the environment (mean airflow), the geostrophic deflection force, and the friction force.

Typhoons in the Northern Hemisphere are counterclockwise under the action of geostrophic deflection force, why is the geostrophic deflection force to the right.

Southern Hemisphere to the left.

The earth turns from west to east.

You can take a ball and put it in the water.

Or turn it with an umbrella (there is water on it).

Pay attention to the direction of rotation.

You can see the different directions of the movement of the water on the sphere in the northern and southern hemispheres.

Because the earth rotates, typhoons are affected by the geostrophic deflection force, so typhoons in the northern hemisphere rotate counterclockwise, while typhoons in the southern hemisphere rotate clockwise.

This is because of the relationship between the rotation of the earth. As a result, typhoons in the Northern Hemisphere will only rotate counterclockwise.

The geostrophic deflection is south, left, north, right. The wind at the center of the typhoon is upward, it is a cyclone, counterclockwise. The water flow in the center of the vortex drops, similar to an anticyclone, rotating clockwise.

The Northern Hemisphere cyclone map is as follows:

a b c d

Figure A is a diagram of a typhoon (cyclone). Counterclockwise.

Figure c is a diagram of the vortex and anticyclone. Clockwise.

Due to the geostrophic deflection force, the Northern Hemisphere shifts to the right and the Southern Hemisphere to the left, making the cyclone counterclockwise and the Southern Hemisphere clockwise.

Take a look at the diagram below to get an idea:

Northern Hemisphere: North (high latitude) at the top, south (low latitude) at the bottom, west on the left, and east on the right; The direction of the wind is the direction in which the wind is blowing;

The cyclone blows in the eastern part of the Northern Hemisphere (2 arrows) from the lower (low latitude and south latitude) to the upper (high latitude and northern latitude), so it is a southerly wind (southeast wind to be exact), coming from low latitude; In the same way, the western part of the Northern Hemisphere (1 arrow) blows from the upper (high latitude and latitude) to the lower (low latitude and south), so it is a northerly wind (northwest wind) and the air comes from the high latitude.

Because the cyclone is a low-pressure area.