Equatorial regions is hotter and the air above expands, becomes less dense and rises. This produces a low pressure belt at this latitude. 1. ... 30 o N & S latitudes are high pressure belts.
Why is pressure low at the equator relative to pressure at 30 N or 30 S latitude?
The air that rises at the equator does not flow directly to the poles. Due to the rotation of the earth, there is a build up of air at about 30° north latitude. (The same phenomenon occurs in the Southern Hemisphere). ... The colliding air is forced upward and an area of low pressure is created near 60° north.
Why is there low pressure at 30 degrees from the equator?
Air rises at the equator , leading to low pressure and rainfall. When the air reaches the edge of the atmosphere, it cannot go any further and so it travels to the north and south. The air becomes colder and denser, and falls, creating high pressure and dry conditions at around 30° north and south of the equator.
What happens to air at 30 N and 30 S of the equator?
In the zone between about 30° N. and 30° S., the surface air flows toward the Equator and the flow aloft is poleward . A low-pressure area of calm, light variable winds near the equator is known to mariners as the doldrums.
Why does the air fall back to earth at 30 degrees north and 30 degrees south?
The air that rises at the solar equator descends near 30 degrees N or S. ... As the air mass strikes the ground in subtropical latitudes and spreads to the north and south, it draws moisture from the land , creating zones of arid climate centered at latitudes of about 30 degrees north and south of the equator.
Atmospheric pressure is dependent on two things, water content and temperature. As temperature goes up pressure goes up. Therefore as your latitude increases the pressure drops . This drop in pressure also results in a drop in the heights of the different levels of the atmosphere.
Is 30 Degrees North High or Low Pressure?
Polar regions are colder, and air above contracts, becomes denser, and subsides, producing a high pressure region at this latitude. C. 30 o N & S latitudes are high pressure belts. Many of the world’s deserts are situated at this latitude.
What causes air to move?
Air in the atmosphere moves around the world in a pattern called global atmospheric circulation. ... This pattern, called atmospheric circulation, is caused because the Sun heats the Earth more at the equator than at the poles . It’s also affected by the spin of the Earth. In the tropics, near the equator, warm air rises.
Why does air sink at 30 degrees latitude?
The air sink at 30 degree latitude as it is very cool enough at that time . Cooler air will have a higher density which will make the air to sink to the Earth surface create a high pressure area.
Why is 30 latitude dry?
With warm air rising above the equator and the cooled air falling to the north and south, two circular patterns of air movement are created around the equator. ... At 30 to 50 degrees north and south of the equator, this falling air makes dry air drier . It also turns the land below it into a desert.
Why does air crossing the equator turn right?
Answer: The air that rises at the equator does not flow directly to the poles. ... Because of the rotation of the earth and the coriolis force, air is deflected to the right in the Northern Hemisphere .
What causes water to rise near the equator?
Upwelling is a result of winds and the rotation of the Earth. The Earth rotates on its axis from west to east. ... The Coriolis effect also causes upwelling in the open ocean near the Equator. Trade winds at the Equator blow surface water both north and south, allowing upwelling of deeper water.
At which pressure belt S is air sinking?
At about 30 degrees north and 30 degrees south latitude , some of the cool air begins to sink. Cool, sinking air causes high pressure belts near 30 degrees latitude in both hemispheres. The cool air flows back to the equator where it warms and rises again. At the poles, cold air sinks and moves toward the equator.
What is the climate at 30 degrees latitude?
At 30 degrees latitude, the dry air creates deserts . Major deserts of the world, including the Sahara, Arabian, Gobi, Great Victoria, Kalahari, Atacama, and the Chihuahuan/Sonoran deserts occur around 30° N or 30° S.
What is 30 degrees north of the equator?
The horse latitudes are located at about 30 degrees north and south of the equator. It is common in this region of the subtropics for winds to diverge and either flow toward the poles (known as the prevailing westerlies) or toward the equator (known as the trade winds).
What happens to warm air when it cools?
As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.
