What is Earth Deflection Force? Where is the greatest deflection force of the Earth s rotation

You're talking about geostrophic deflection forces, right?

Geostrophic deflection force, also known as Coriolis force, is a force that occurs from the rotation of the earth in the graticule of the earth as a frame of reference.

The force that acts on the moving air due to the rotation of the earth is called the geostrophic deflection force, or deflection force for short. It only arises when the object is moving relative to the ground (it does not actually exist), and can only change (horizontally) the direction of the object's motion, not the rate of the object's motion. The geostrophic deflection force can be decomposed into two components: the horizontal geostrophic deflection force and the vertical geostrophic deflection force.

Since the ground plane on the equator rotates around an axis parallel to the plane, the geostrophic deflection force generated by the horizontal motion of air relative to the ground plane is located in the plane perpendicular to the ground plane, so there is only a perpendicular geostrophic deflection force, but no horizontal geostrophic deflection force. Since the polar geoplane rotates around an axis perpendicular to the plane, the geostrophic deflection force generated by the horizontal motion of the air relative to the ground plane is located on the same horizontal plane perpendicular to the axis of rotation, so there is only a horizontal geostrophic deflection force and no vertical geostrophic deflection force. At each latitude between the equator and the polar regions, the earth plane rotates around an axis parallel to the earth's axis, and the axis has a certain angle of intersection with the horizontal plane, and there are both components that rotate parallel to the earth plane and components that rotate perpendicular to the earth plane, so there are both vertical and horizontal geostrophic deflection forces.

The reason is briefly described as follows: in order to maintain horizontal inertial motion of an object, the graticule generates relative acceleration due to the rotation of the earth.

There are conditions. The size of an object in a non-equatorial region that has a velocity component in the direction of horizontal motion for the ground. f=2mvωsinφ

m is the mass of the object.

f is the magnitude of the geostrophic deflection force.

v is the horizontal velocity component of the object.

is the angular velocity of the Earth's rotation.

sin is a sinusoidal function.

is the latitude at which the object is located.

Direction. Perpendicular to the direction of the horizontal component of the velocity of the object, the northern hemisphere to the right and the southern hemisphere to the left geographical significance. It has an impact on ocean currents, rivers, winds, and other things that have horizontal motion.

Geostrophic deflection force and life.

The geostrophic deflection force is actually the Coriolis force, or Co-Formula force for short.

This is not a force that actually exists and is produced due to the conversion to a non-inertial circular motion frame of reference.

It is better to use advanced mathematics for specific derivation and definition.

Or just look for physics at this university.

is the pole, the equator is the smallest and the two levels are the largest. The geostrophic deflection force is actually formed by inertia - for example, for an object moving in the north-south direction, because the angular velocity of the earth's rotation is constant, but the perimeter of the latitude line is changing, so the linear velocity is inconsistent, for example, the object moving south in the northern hemisphere deviates eastward due to entering the lower latitude with greater linear velocity (the deflection force of the east-west moving object is more complicated, so it is not considered for the time being). ）

So the magnitude of the geostrophic deflection force depends on the degree to which the circumference of the weft coil changes when the object passes at the same angle (i.e., distance) on the meridian line. What is clear is that the higher the latitude, the more parallel the ground is to the equator, the more obvious the change in the circumference of the latitude coil caused by the same north-south distance on the meridian, and the greater the geostrophic deflection force.

The following is the first experiment to prove the geostrophic deflection force - Introduction to Foucault's pendulum (excerpt from Encyclopedia) The pendulum is a very interesting device. Give the pendulum a proper starting role, and it will always move in a certain direction, or a certain plane. If the pendulum angle is less than 5 degrees, the pendulum can even be regarded as a harmonic oscillator that moves in one dimension.

Now, consider a simple scenario: what would happen if Foucault was placed at the North Pole? It is clear that the Earth is rotating – relative to distant stars. Similarly, due to inertia, the pendulum of the Foucault pendulum is invariant in the direction of motion (plane) with respect to distant stars.

As you can imagine, there are three distant stars that have determined a plane and the Foucault pendulum moves exactly within this plane. Due to inertia, the pendulum is still moving in that plane when the earth and the frame used to lift the pendulum rotates) So what happened? If you stand on the surface of the earth near the Foucault pendulum, you will obviously notice that the plane of the swing is slowly turning, and it is turning at about half the speed of the clock hand, that is, every hour the Foucault pendulum will turn 15 degrees clockwise.

Swing in the same plane, which is determined by distant stars, what if you put Foucault's pendulum on the equator? In that case, we won't be able to observe any rotation. Considering the motion of the pendulum as one-dimensional resonance (single pendulum), since its direction of motion is parallel to the Earth's axis, which is stationary relative to distant stars, we cannot observe the rotation of the Foucault pendulum relative to the ground.

Geostrophic deflection force refers to a force that deflects all objects that move horizontally on the earth due to the rotation of the earth.

The direction can be judged by hand: in the northern hemisphere of the Lee do, with the right hand. The hand is open, the palm is upward, the four fingers are together and perpendicular to the thumb, and the four fingers are pointing in the direction of the object's movement, then the direction of the thumb is the direction of the ground rotation deflection force; In the Southern Hemisphere, with the left hand, the hand is open, the palm is up, the four fingers are together and perpendicular to the thumb touching, and the four-finger laughing band points to the direction of the object's motion, then the direction of the thumb is the direction of the geostrophic deflection force.

Impact: It is one of the necessary conditions for the occurrence of typhoons; It adds technical difficulty to the pilot's pilot.

Geostrophic deflection force refers to the force perpendicular to the direction of motion of objects on the earth's surface due to the rotation of the earth. When an object moves relative to the earth's surface, it is affected by a force called the geostrophic deflection force and changes direction, but the geostrophic deflection force is not a real force, but an inertial force. Geostrophic deflection force is a force that cannot be ignored for aerospace and aviation, the geostrophic deflection force is most significant in the polar regions, and gradually weakens in the direction of the equator until it disappears at the equator, and the geostrophic deflection force is very small in daily life, which is negligible.

In practice, it is extremely inconvenient to describe the movement of sea water or atmosphere on Earth from the point of view of absolute space. It is much more convenient to describe it in terms of space that rotates synchronously with the Earth. Therefore, if the equation of motion of absolute space is rewritten into the equation of motion of the spatial coordinate system that moves synchronously with the earth.

The force exerted on an object per unit mass of this acceleration is called the Earth's rotational deflection force.

This deflection force is at right angles to the direction of the Earth's motion (90 to the right in the Northern Hemisphere).', in the Southern Hemisphere to the left into 90'), acting on the Earth. The 2mv sin is called the Coriolis parameter and is a function of latitude. When discussing small-scale motion, it can be thought of as an immutable constant.

Causes. Geostrophic deflection force is a force that causes a moving object on the earth's surface to experience a force perpendicular to the direction of its motion due to the rotation of the earth. The full name is the Earth's rotational deflection force. The geostrophic deflection force does not change the velocity (magnitude of velocity) of a moving object on the earth's surface, but it can change the direction of a moving object.

Geostrophic deflection forces have obvious effects on monsoon circulation, air mass movements, cyclone (typhoon) and anticyclone (cold air) migration paths, ocean currents and river movements, and many other natural phenomena.

Because except for the north and south poles, the angular velocity of each latitude is the same, when flying from north to south, the circle of the south is larger, that is, the longer the latitude line is to the south, so the linear velocity is large, so a small linear velocity in the north is slower than the linear velocity of the south, so it is biased to the right due to inertia. The same goes for the north, from the fast place to the slow place, the speed is "ahead", and the direction of progress is also deviated to the right.

There must be a sufficiently large deflection force for the rotation of the Earth. When the geostrophic deflection force of the equator is zero, the deflection force gradually increases to the poles, and the typhoon occurs at more than 5 latitudes away from the equator. As a result of the rotation of the Earth, a force is created that changes the direction of the flow of air, which is called the "Earth's rotation deflection force".

On a rotating Earth, the Earth's rotation makes it difficult for the surrounding air to flow directly into the depression, but instead rotates counterclockwise along the center of the depression (in the Northern Hemisphere).

First of all, gravity arises because of gravity, not the rotation of the earth. There is a gravitational attraction between two massive objects, which has nothing to do with their state of motion.

Second, the rotation of the Earth does produce a geostrophic deflection force, but this force is a component of the Earth's gravitational pull on an object, and the other component is what we know as gravity that is always perpendicular to the ground.

If the Earth stops rotating, then it is known that the geostrophic deflection force will disappear, but the gravitational force will not.